ledga/PROJECT_PLAN.md

Ledga — M-Pesa Spending Tracker

Overview

A native Android app that automatically tracks M-Pesa spending by reading SMS confirmations. Zero manual entry — install, grant SMS permission, done. Built for non-technical users with a clean, Canva-like UI.

Target users: Family members (all Android), non-technical Distribution: Direct APK install + in-app self-updates via GitHub Releases (no Play Store) Data model: Fully offline, local-only per device. No accounts, no server.

---

Tech Stack

Component	Technology
Language	Kotlin
UI Framework	Jetpack Compose + Material 3
Local Database	Room (SQLite)
Background SMS	BroadcastReceiver + WorkManager
DI	Hilt (dependency injection)
Settings Storage	Jetpack DataStore (Preferences)
Charts	Vico (Compose-native charting library)
Notifications	Android NotificationManager + AlarmManager
Backup	Google Drive API (auto), manual file export
Self-Update	GitHub Releases API
Min SDK	API 26 (Android 8.0)
Build	Gradle (Kotlin DSL)

---

Architecture

┌─────────────────────────────────────────────┐
│                    UI Layer                  │
│         Jetpack Compose + Material 3        │
│  ┌──────┐ ┌──────────┐ ┌──────┐ ┌────────┐ │
│  │ Home │ │Transactions│ │Trends│ │Settings│ │
│  └──────┘ └──────────┘ └──────┘ └────────┘ │
├─────────────────────────────────────────────┤
│               ViewModel Layer               │
│            StateFlow + Coroutines           │
├─────────────────────────────────────────────┤
│              Repository Layer               │
│     TransactionRepo │ CategoryRepo │        │
│     SettingsRepo    │ BackupRepo   │        │
├─────────────────────────────────────────────┤
│               Data Layer                    │
│  ┌──────┐  ┌───────────┐  ┌─────────────┐  │
│  │ Room │  │SMS Parser │  │Google Drive │  │
│  │  DB  │  │           │  │  Backup     │  │
│  └──────┘  └───────────┘  └─────────────┘  │
├─────────────────────────────────────────────┤
│            System Services                  │
│  SMS BroadcastReceiver │ WorkManager        │
│  NotificationManager   │ AlarmManager       │
└─────────────────────────────────────────────┘

---

SMS Parsing

Sender Filter

Only process SMS from sender: MPESA

Transaction Types & Patterns

1. Send Money

RK31B7X4ZQ Confirmed. Ksh500.00 sent to JOHN DOE 0712345678 on 21/3/26 at 1:30 PM. New M-PESA balance is Ksh1,200.00. Transaction cost, Ksh0.00.

→ Extract: code, amount, recipient name, recipient phone, date/time, balance, cost

2. Buy Goods (Till)

RK31B7X4ZQ Confirmed. Ksh1,200.00 paid to NAIVAS SUPERMARKET. on 21/3/26 at 2:15 PM.New M-PESA balance is Ksh3,500.00. Transaction cost, Ksh0.00.

→ Extract: code, amount, merchant name, date/time, balance, cost

3. Pay Bill

RK31B7X4ZQ Confirmed. Ksh2,500.00 paid to KPLC PREPAID. Account Number 12345678. on 21/3/26 at 3:00 PM. New M-PESA balance is Ksh1,000.00. Transaction cost, Ksh0.00.

→ Extract: code, amount, business name, account number, date/time, balance, cost

4. Withdraw (Agent)

RK31B7X4ZQ Confirmed.You have withdrawn Ksh1,000.00 from JAMES AGENT 543210 on 21/3/26 at 4:00 PM.New M-PESA balance is Ksh500.00. Transaction cost, Ksh28.00.

→ Extract: code, amount, agent name, agent number, date/time, balance, cost

5. Withdraw (ATM)

RK31B7X4ZQ Confirmed. You have withdrawn Ksh5,000.00 from an ATM on 21/3/26 at 4:30 PM. New M-PESA balance is Ksh2,000.00. Transaction cost, Ksh34.00.

→ Extract: code, amount, date/time, balance, cost → Note: No agent name/number — just "from an ATM"

6. Deposit

RK31B7X4ZQ Confirmed.You have deposited Ksh5,000.00 to your M-PESA account on 21/3/26 at 10:00 AM.New M-PESA balance is Ksh5,500.00.

→ Extract: code, amount, date/time, balance

7. Received Money

RK31B7X4ZQ Confirmed.You have received Ksh2,000.00 from JANE DOE 0798765432 on 21/3/26 at 11:00 AM.New M-PESA balance is Ksh7,500.00.

→ Extract: code, amount, sender name, sender phone, date/time, balance

8. Airtime Purchase (Self)

RK31B7X4ZQ Confirmed. Ksh100.00 of airtime purchased on 21/3/26 at 12:00 PM.New M-PESA balance is Ksh7,400.00. Transaction cost, Ksh0.00.

→ Extract: code, amount, date/time, balance, cost

9. Airtime Purchase (For Others)

RK31B7X4ZQ Confirmed. You bought Ksh100.00 of airtime for 0712345678 on 21/3/26 at 12:30 PM.New M-PESA balance is Ksh7,300.00. Transaction cost, Ksh0.00.

→ Extract: code, amount, recipient phone, date/time, balance, cost

10. M-Pesa Global (International Transfer)

RK31B7X4ZQ Confirmed. Ksh5,000.00 sent to JOHN DOE +44712345678 (United Kingdom) via M-PESA Global on 21/3/26 at 1:30 PM. New M-PESA balance is Ksh10,000.00. Transaction cost, Ksh150.00.

→ Extract: code, amount, recipient name, recipient phone (international), destination country, date/time, balance, cost

11. Fuliza (Borrow)

RK31B7X4ZQ Confirmed. Ksh500.00 sent to JOHN DOE 0712345678 on 21/3/26 at 1:30 PM. New M-PESA balance is Ksh0.00. Fuliza M-PESA amount is Ksh500.00. Fuliza M-PESA outstanding amount is Ksh500.00.

→ Extract: all standard fields + fuliza amount, fuliza outstanding

12. Fuliza Repayment

RK31B7X4ZQ Confirmed. You have paid Ksh200.00 to Fuliza M-PESA on 21/3/26 at 2:00 PM. Fuliza M-PESA outstanding amount is Ksh300.00.

→ Extract: code, amount, date/time, fuliza outstanding

13. Fuliza Reversal

RK31B7X4ZQ Confirmed. Fuliza M-PESA of Ksh500.00 has been reversed on 21/3/26 at 3:00 PM. Fuliza M-PESA outstanding amount is Ksh0.00.

→ Extract: code, amount, date/time, fuliza outstanding

14. Reversal

RK31B7X4ZQ Confirmed. Transaction RJ12345678 has been reversed. Your account balance is Ksh2,000.00.

→ Extract: code, reversed transaction code, balance

M-Shwari & KCB M-Pesa (Acknowledged, Not Parsed)

These services send SMS from the MPESA sender but are savings/loan products, not spending transactions:

• M-Shwari: Confirmed. Ksh1,000.00 transferred to M-Shwari account... / Ksh1,000.00 transferred from M-Shwari...
• KCB M-Pesa: Confirmed. Ksh2,000.00 transferred to KCB M-Pesa account... / loan disbursements

Strategy: Detect these by keywords ("M-Shwari", "KCB M-Pesa") and store with type MSHWARI or KCB_MPESA. Show them in the transaction list but don't count them as spending. They're internal transfers between M-Pesa wallet and savings/loan products.

Parser Strategy

• Regex-based pattern matching per transaction type
• Keyword detection: "sent to", "paid to", "withdrawn.*from.*AGENT" (agent), "withdrawn.*from an ATM" (ATM), "deposited", "received", "airtime purchased", "bought.*airtime for", "M-PESA Global", "reversed", "Fuliza M-PESA amount", "paid to Fuliza", "Fuliza M-PESA of", "M-Shwari", "KCB M-Pesa"
• Amount extraction: Ksh[\d,]+\.\d{2} pattern
• Date extraction: \d{1,2}/\d{1,2}/\d{2,4} at \d{1,2}:\d{2} [AP]M
• International phone detection: \+\d{7,15} pattern (for M-Pesa Global)
• Country extraction: text in parentheses after international phone number
• Fallback: store unparsed M-Pesa SMS with type UNKNOWN for later parsing improvements

---

Database Schema (Room)

transactions

Column	Type	Description
id	Long (PK, auto)	Primary key
transactionCode	String (unique)	M-Pesa transaction code
type	Enum	SEND, BUY_GOODS, PAY_BILL, WITHDRAW_AGENT, WITHDRAW_ATM, DEPOSIT, RECEIVED, AIRTIME_SELF, AIRTIME_OTHER, MPESA_GLOBAL, FULIZA, FULIZA_REPAYMENT, FULIZA_REVERSAL, MSHWARI, KCB_MPESA, REVERSAL, UNKNOWN
amount	Double	Transaction amount in Ksh
transactionCost	Double	M-Pesa fee
recipientName	String?	Name of recipient/merchant
recipientPhone	String?	Phone number (if person)
accountNumber	String?	Account number (paybill)
destinationCountry	String?	Country name for M-Pesa Global transfers
balance	Double	M-Pesa balance after transaction
direction	Enum	INFLOW, OUTFLOW (derived at parse time — simplifies totals/chart queries)
categoryId	Long? (FK)	Assigned category
fulizaAmount	Double?	Fuliza amount (if applicable)
fulizaOutstanding	Double?	Fuliza outstanding (if applicable)
rawSms	String	Original SMS text (for re-parsing)
timestamp	Long	Transaction timestamp (epoch ms)
createdAt	Long	Record creation time

categories

Column	Type	Description
id	Long (PK, auto)	Primary key
name	String	Category name
icon	String	Material icon name
color	String	Hex color code
isDefault	Boolean	System default vs user-created

budgets

Column	Type	Description
id	Long (PK, auto)	Primary key
categoryId	Long? (FK)	Null = overall budget
monthlyLimit	Double	Budget limit in Ksh
isActive	Boolean	Whether alerts are enabled

category_rules

Column	Type	Description
id	Long (PK, auto)	Primary key
categoryId	Long (FK)	Target category
matchType	Enum	RECIPIENT_NAME, PHONE, TILL, PAYBILL
matchValue	String	Value to match

Default Categories

Category	Icon	Color	Auto-match examples
Groceries	shopping_cart	#4CAF50	NAIVAS, QUICKMART, CARREFOUR
Transport	directions_car	#2196F3	Uber, Bolt, matatu paybills
Bills & Utilities	receipt	#FF9800	KPLC, NAIROBI WATER, DSTV
Airtime & Data	phone_android	#9C27B0	Airtime purchases
Food & Dining	restaurant	#E91E63	Restaurants, fast food
Send Money	person	#607D8B	Person-to-person transfers
Received	account_balance_wallet	#00BCD4	Money received
Withdrawal	atm	#795548	Agent withdrawals
Deposit	savings	#8BC34A	Cash deposits
Shopping	shopping_bag	#FF5722	General merchants
International	public	#3F51B5	M-Pesa Global transfers
Savings & Loans	account_balance	#009688	M-Shwari, KCB M-Pesa
Other	category	#9E9E9E	Uncategorized

---

Screens & UI

Design System

• Color palette: M-Pesa green (#4CAF50) as primary, warm neutrals, category-specific accent colors
• Typography: System font, scalable (Small/Medium/Large/Extra Large + System Default)
• Cards: Rounded corners (16dp), subtle elevation, clean spacing
• Animations: Smooth transitions between screens, animated chart loading
• Dark mode: Full dark theme, follows system by default with manual override

1. Home Dashboard

┌─────────────────────────────────┐
│  Good morning 👋                │
│                                 │
│  M-PESA Balance                 │
│  Ksh 12,500.00                  │
│  (from last transaction)        │
│                                 │
│  ┌─────────────────────────┐   │
│  │   March 2026            │   │
│  │   Spent: Ksh 45,200     │   │
│  │   ▼ 12% vs last month   │   │
│  │   Fees: Ksh 320         │   │
│  └─────────────────────────┘   │
│                                 │
│  [Today] [This Week] [Month]   │
│                                 │
│  ┌─────────────────────────┐   │
│  │    🍩 Donut Chart       │   │
│  │    Category Breakdown    │   │
│  └─────────────────────────┘   │
│                                 │
│  Recent Transactions            │
│  ┌─────────────────────────┐   │
│  │ 🛒 Naivas    -Ksh 1,200 │   │
│  │ 📱 Airtime     -Ksh 100 │   │
│  │ 💰 Received  +Ksh 5,000 │   │
│  └─────────────────────────┘   │
│                                 │
│  ┌────┐┌────┐┌────┐┌────┐     │
│  │Home││List││Stats││ ⚙️ │     │
│  └────┘└────┘└────┘└────┘     │
└─────────────────────────────────┘

Balance display: Shows the balance field from the most recent transaction. This is the last known M-Pesa balance — not a live query. Labeled "from last transaction" so users don't confuse it with a real-time check.

2. Transactions List

• Grouped by day with day totals
• Each item: category icon + recipient/merchant + amount (red spent, green received)
• Search bar at top
• Filter chips: All, Sent, Received, Bills, Goods, Withdraw
• Tap → transaction detail bottom sheet
• Long press → change category

3. Trends / Analytics

• Bar chart: daily spending for current month
• Line chart: monthly spending over time
• Top 5 recipients/merchants list
• Category comparison vs previous period
• Transaction fees summary — total fees paid this period (most people don't realize how much they spend on M-Pesa fees)
• Period selector: 7D / 30D / 90D / 1Y

4. Settings

Appearance
  ├── Theme: System / Light / Dark
  └── Font Size: System Default / Small / Medium / Large / Extra Large

Notifications
  ├── Daily Summary: ON/OFF + time picker
  ├── Weekly Summary: ON/OFF
  ├── Budget Alerts: ON/OFF
  └── Large Transaction Alert: ON/OFF + threshold (Ksh)

Budgets
  ├── Overall Monthly Budget: Ksh ___
  └── Per Category: [list of categories with limits]

Data
  ├── Import SMS History
  ├── Export Data (CSV/JSON)
  ├── Unparsed Messages (X) — view SMS that failed to parse
  └── Clear All Data (with confirmation)

Backup
  ├── Auto Backup: ON/OFF
  ├── Backup Frequency: Daily / Weekly
  ├── Google Account: shown
  ├── Last Backup: date
  ├── Back Up Now
  └── Restore from Backup

About
  ├── Version: 1.0.0
  ├── Check for Updates
  └── What's New

---

Notification System

Notification	Trigger	Default
Daily Summary	Scheduled (user picks time, default 8 PM)	ON
Weekly Summary	Every Sunday evening	ON
Budget Warning	80% of budget reached	ON
Budget Exceeded	100% of budget reached	ON
Large Transaction	Single transaction > threshold	OFF (default Ksh 5,000)

Implementation:

• WorkManager for periodic summary jobs
• Immediate check on each new transaction for budget/large amount alerts
• NotificationChannel: "Spending Summaries", "Budget Alerts"

---

Backup System

Google Drive Auto-Backup

• Uses Google Sign-In (already on every Android phone)
• Backs up Room database + settings to app-specific Google Drive folder
• No extra permissions needed (app data folder is automatic)
• Frequency: daily or weekly (user choice)
• On fresh install: detect existing backup → prompt restore

Manual Export/Import

• Export: generates a ZIP file containing:
  • transactions.csv — human-readable, can open in Excel
  • data.json — full database export for app restore
• Import: select ZIP file → restore all data
• Share via WhatsApp, Bluetooth, email, etc.

SMS Re-import (Fallback)

• Scan all existing SMS from "MPESA" sender
• Parse and import, skipping duplicates (by transaction code)
• Progress indicator during import

---

Self-Update System

Flow

1. App checks GitHub Releases API on launch (max once per day)
2. Compares current version with latest release tag
3. If newer version exists:
   • Shows non-intrusive banner: "Update available (v1.2.0)"
   • Tap → shows changelog (from release notes)
   • "Download & Install" button
4. Downloads APK to app cache
5. Triggers Android package installer intent
6. User confirms install (standard Android prompt)

GitHub Release Format

Tag: v1.0.0
Title: Version 1.0.0
Body: Changelog in markdown
Asset: ledga-v1.0.0.apk

Endpoint

GET https://api.github.com/repos/{owner}/{repo}/releases/latest

---

Auto-Categorization

Rule Engine (Priority Order)

1. User rules — if user manually categorized a merchant before, remember it
2. Category rules table — pattern matching on recipient name, till number, paybill
3. Transaction type fallback — airtime → Airtime, withdrawal → Withdrawal, etc.
4. Default — "Other" category

Pre-loaded Rules

Pattern	Match Type	Category
NAIVAS, QUICKMART, CARREFOUR, CLEANSHELF	Recipient	Groceries
KPLC, KENYA POWER	Recipient	Bills
888880 (KPLC Prepaid), 888888 (KPLC Postpaid)	Paybill	Bills
NAIROBI WATER, ELDORET WATER	Recipient	Bills
444400 (Nairobi Water)	Paybill	Bills
DSTV, GOTV, SHOWMAX	Recipient	Bills
UBER, BOLT, LITTLE	Recipient	Transport
JAVA, KFC, CHICKEN INN, PIZZA INN	Recipient	Food & Dining
(any self airtime)	Type	Airtime
(any airtime for others)	Type	Airtime
(any withdrawal)	Type	Withdrawal
(any deposit)	Type	Deposit
(any received)	Type	Received
(any send money)	Type	Send Money
(any M-Pesa Global)	Type	International
(any M-Shwari)	Type	Savings & Loans
(any KCB M-Pesa)	Type	Savings & Loans

Users can add/edit rules from the category settings.

---

Permissions Required

Permission	Purpose	When Requested
RECEIVE_SMS	Listen for new M-Pesa SMS in real-time	On first launch
READ_SMS	Import existing M-Pesa SMS history	When user taps "Import History"
POST_NOTIFICATIONS	Daily summaries, budget alerts	On first launch (Android 13+)
INTERNET	Google Drive backup, update checks	Automatic
REQUEST_INSTALL_PACKAGES	Self-update APK installation	When user taps "Install Update"

---

Project Structure

ledga/
├── app/
│   ├── src/
│   │   ├── main/
│   │   │   ├── java/com/ledga/app/
│   │   │   │   ├── MainActivity.kt
│   │   │   │   ├── LedgaApp.kt
│   │   │   │   ├── di/
│   │   │   │   │   ├── AppModule.kt
│   │   │   │   │   └── DatabaseModule.kt
│   │   │   │   ├── data/
│   │   │   │   │   ├── db/
│   │   │   │   │   │   ├── AppDatabase.kt
│   │   │   │   │   │   ├── Migrations.kt
│   │   │   │   │   │   ├── dao/
│   │   │   │   │   │   │   ├── TransactionDao.kt
│   │   │   │   │   │   │   ├── CategoryDao.kt
│   │   │   │   │   │   │   └── BudgetDao.kt
│   │   │   │   │   │   └── entity/
│   │   │   │   │   │       ├── Transaction.kt
│   │   │   │   │   │       ├── Category.kt
│   │   │   │   │   │       ├── Budget.kt
│   │   │   │   │   │       └── CategoryRule.kt
│   │   │   │   │   ├── repository/
│   │   │   │   │   │   ├── TransactionRepository.kt
│   │   │   │   │   │   ├── CategoryRepository.kt
│   │   │   │   │   │   └── SettingsRepository.kt
│   │   │   │   │   └── parser/
│   │   │   │   │       └── MpesaSmsParser.kt
│   │   │   │   ├── receiver/
│   │   │   │   │   └── SmsReceiver.kt
│   │   │   │   ├── worker/
│   │   │   │   │   ├── NotificationWorker.kt
│   │   │   │   │   ├── BackupWorker.kt
│   │   │   │   │   └── UpdateCheckWorker.kt
│   │   │   │   ├── ui/
│   │   │   │   │   ├── theme/
│   │   │   │   │   │   ├── Theme.kt
│   │   │   │   │   │   ├── Color.kt
│   │   │   │   │   │   └── Type.kt
│   │   │   │   │   ├── navigation/
│   │   │   │   │   │   └── AppNavigation.kt
│   │   │   │   │   ├── onboarding/
│   │   │   │   │   │   ├── OnboardingScreen.kt
│   │   │   │   │   │   └── OnboardingViewModel.kt
│   │   │   │   │   ├── home/
│   │   │   │   │   │   ├── HomeScreen.kt
│   │   │   │   │   │   └── HomeViewModel.kt
│   │   │   │   │   ├── transactions/
│   │   │   │   │   │   ├── TransactionsScreen.kt
│   │   │   │   │   │   ├── TransactionDetailSheet.kt
│   │   │   │   │   │   └── TransactionsViewModel.kt
│   │   │   │   │   ├── trends/
│   │   │   │   │   │   ├── TrendsScreen.kt
│   │   │   │   │   │   └── TrendsViewModel.kt
│   │   │   │   │   ├── settings/
│   │   │   │   │   │   ├── SettingsScreen.kt
│   │   │   │   │   │   ├── SettingsViewModel.kt
│   │   │   │   │   │   └── UnparsedSmsScreen.kt
│   │   │   │   │   └── components/
│   │   │   │   │       ├── TransactionCard.kt
│   │   │   │   │       ├── CategoryChip.kt
│   │   │   │   │       ├── SpendingChart.kt
│   │   │   │   │       └── BudgetProgressBar.kt
│   │   │   │   └── util/
│   │   │   │       ├── CurrencyFormatter.kt
│   │   │   │       └── DateUtils.kt
│   │   │   ├── res/
│   │   │   └── AndroidManifest.xml
│   │   └── test/
│   │       └── java/com/ledga/app/
│   │           └── parser/
│   │               └── MpesaSmsParserTest.kt
│   └── build.gradle.kts
├── build.gradle.kts
├── settings.gradle.kts
└── README.md

---

Build Phases

Phase 1 — Core (MVP)

• Project setup (Kotlin, Compose, Room, Hilt, Gradle)
• SMS parser — handle all M-Pesa transaction types (including M-Pesa Global, M-Shwari, KCB M-Pesa)
• SMS parser unit tests — real SMS samples for every transaction type
• Room database — transactions, categories, category rules, migrations setup
• SMS BroadcastReceiver — real-time capture
• SMS history import
• Onboarding flow — welcome screen, SMS permission with plain-language explanation, optional history import
• Home dashboard — current balance, spending total, fees total, donut chart, recent transactions
• Transactions list — grouped by day, search, filter
• Basic auto-categorization with default rules (name + paybill/till matching)
• Bottom navigation (Home, Transactions, Trends, Settings)
• Theme system (System/Light/Dark)

Phase 2 — Polish

• Trends screen — bar charts, line charts, top merchants, fees summary, period comparison
• Font size settings (System/Small/Medium/Large/Extra Large)
• Budget system — set limits, track progress bars
• Category management — add/edit/delete custom categories
• Transaction detail bottom sheet
• Long press to re-categorize
• Category rules editor
• Unparsed SMS viewer (Settings → Data)

Phase 3 — Notifications & Backup

• Daily spending summary notification
• Weekly summary notification
• Budget alert notifications
• Large transaction alerts
• Notification settings (toggles, time pickers)
• Google Drive auto-backup
• Google Drive restore on fresh install
• Manual export (CSV + JSON zip)
• Manual import

Phase 4 — Distribution

• APK signing setup — generate keystore, document secure storage
• GitHub Actions CI/CD — build release APK on push to main
• GitHub Releases self-update system
• Update check on launch
• Changelog display
• APK download + install flow
• App icon and splash screen
• Final UI polish and animations

---

App Name

Ledga — a play on "ledger". Short, unique, easy to say.

• Package name: com.ledga.app

---

Onboarding Flow

First launch experience for non-technical users. Only shown once — a hasCompletedOnboarding flag in DataStore skips it on subsequent launches.

┌─────────────────────────────────┐
│                                 │
│        Welcome to Ledga         │
│                                 │
│   Track your M-Pesa spending    │
│   automatically. No typing,    │
│   no manual entry.              │
│                                 │
│        [Get Started →]          │
│                                 │
└─────────────────────────────────┘
          ↓
┌─────────────────────────────────┐
│                                 │
│   Ledga reads your M-Pesa SMS  │
│   to track your spending.       │
│                                 │
│   Your messages never leave     │
│   your phone. Everything stays  │
│   private and offline.          │
│                                 │
│     [Allow SMS Access →]        │
│                                 │
└─────────────────────────────────┘
          ↓
┌─────────────────────────────────┐
│                                 │
│   Import your M-Pesa history?  │
│                                 │
│   We can scan your existing     │
│   M-Pesa messages to build     │
│   your spending history.        │
│                                 │
│   [Import History]              │
│   [Skip — start fresh]         │
│                                 │
│   ┌─────────────────────┐      │
│   │ ████████░░ 67%      │      │
│   │ Found 342 transactions│      │
│   └─────────────────────┘      │
│                                 │
└─────────────────────────────────┘
          ↓
┌─────────────────────────────────┐
│                                 │
│         You're all set!         │
│                                 │
│   Ledga will now track your     │
│   M-Pesa spending in the       │
│   background.                   │
│                                 │
│     [Go to Dashboard →]        │
│                                 │
└─────────────────────────────────┘

---

Testing Strategy

Unit Tests (Critical)

• SMS Parser — test every transaction type with real M-Pesa SMS samples
  • At least 3 variations per type (different amounts, names, edge cases)
  • Malformed messages (truncated SMS, missing fields)
  • Messages from non-M-Pesa senders (should be ignored)
  • Fuliza messages embedded in send/buy goods SMS
  • M-Pesa Global with various country formats
  • M-Shwari/KCB M-Pesa detection
  • Amount parsing edge cases: Ksh1.00, Ksh100,000.00
• Auto-categorization — rule matching priority, paybill matching, fallback behavior
• CurrencyFormatter — Ksh formatting, large numbers, zero amounts

Integration Tests

• Room database — DAO queries, migrations, duplicate transaction code handling
• SMS import — bulk parsing performance, duplicate skipping

Manual Testing

• Collect real M-Pesa SMS from family members (anonymized) as test fixtures
• Test on low-end Android devices (target audience likely has budget phones)

---

APK Signing & CI/CD

Keystore

• Generate a release keystore and store it securely
• CRITICAL: Back up the keystore — if lost, existing installs can never receive updates (Android requires consistent signing)
• Store keystore password and key alias in a secure location (not in the repo)

GitHub Actions

# .github/workflows/release.yml
# Triggered on push to main or manual dispatch
# Steps:
#   1. Checkout code
#   2. Set up JDK 17
#   3. Decode keystore from GitHub secret
#   4. Build release APK (assembleRelease)
#   5. Sign APK
#   6. Create GitHub Release with APK asset

GitHub Secrets Required

Secret	Purpose
KEYSTORE_BASE64	Base64-encoded release keystore
KEYSTORE_PASSWORD	Keystore password
KEY_ALIAS	Key alias name
KEY_PASSWORD	Key password

---

Database Migrations

Schema changes are inevitable as the app evolves. Room requires explicit migrations to preserve user data.

Strategy

• Never use fallbackToDestructiveMigration() — this destroys all user data on schema change
• Define all migrations in Migrations.kt as Migration(oldVersion, newVersion) objects
• Test every migration path with Room's MigrationTestHelper
• Keep a version history:

Version	Changes
1	Initial schema (transactions, categories, budgets, category_rules)

Example Migration Pattern

val MIGRATION_1_2 = object : Migration(1, 2) {
    override fun migrate(db: SupportSQLiteDatabase) {
        db.execSQL("ALTER TABLE transactions ADD COLUMN newField TEXT")
    }
}

---

Notes

• All data stays on device — no external server, no analytics, no tracking
• SMS parsing must be thoroughly tested with real M-Pesa SMS variations
• Fuliza messages have extra fields — parser must handle gracefully
• Fuliza has 3 distinct message types: borrow (Fuliza M-PESA amount), repayment (paid to Fuliza), and reversal — each has a different format
• Some M-Pesa SMS formats may vary slightly — keep raw SMS stored for re-parsing
• Transaction code uniqueness prevents duplicate imports
• Multi-SIM: some users have two M-Pesa lines — consider adding a simSlot or phoneNumber field on transactions (extracted from SMS subscription ID) if multi-line tracking is needed later
• Google Drive backup uses appDataFolder scope — backups are invisible to the user in Drive. This is by design (no extra permissions), but users should know they won't find the file browsing Drive manually
• The direction column (INFLOW/OUTFLOW) is set at parse time based on transaction type, avoiding repeated derivation in every query for totals and charts