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Vantage captures spending by listening to Android push notifications from your banking apps. No bank API, no screen scraping, no manual entry.

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How it works

The parser runs locally on your device — notification text never leaves your phone except when Haiku fallback is triggered, in which case only the raw text string is sent (never the full notification object or any metadata).

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Singapore

Package: com.dbs.sg.dbsmbanking Default currency: SGDSupported notification formats:
SGD 45.50 spent on Grab at 3:15 PM. Card ending 1234
Card ending 1234: SGD 150.00 at FairPrice
You spent SGD 32.00 at NTUC. DBS Visa ending 9012
You have made a transaction of SGD 42.50 at GRAB FOOD with card ending 1234
Regex patterns (simplified):
// Pattern 1: "SGD <amount> spent on <merchant>"
r'SGD\s*(?<amount>[\d,]+\.?\d*)\s+spent\s+(?:on\s+)?(?<merchant>.+?)(?:\s+at\s+[\d:]+|\.|\s+Card)'

// Pattern 2: "Card ending <last4>: SGD <amount> at <merchant>"
r'Card ending\s*(?<last4>\d{4}):\s*SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 3: "You spent SGD <amount> at <merchant>"
r'You\s+spent\s+SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 4: "transaction of SGD <amount> at <merchant> with card ending <last4>"
r'transaction\s+of\s+SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)\s+with\s+card\s+ending\s+(?<last4>\d{4})'
Packages: sg.com.hsbc.hsbcsingapore / com.hsbc.hsbcsg (legacy) Default currency: SGDSupported notification formats:
Purchase at SANKRANTI - BIOPOLIS on ** 8692 for SGD10.90
Payment of SGD 500.00 received
Card transaction: SGD 88.00 at Uniqlo
HSBC Card ending 7890: SGD 200.00 spent at Apple Store
You made a purchase of SGD 45.00 at Don Don Donki
Regex patterns (simplified):
// Pattern 1: "Purchase at <merchant> on **<last4> for SGD<amount>"
r'Purchase\s+at\s+(?<merchant>.+?)\s+on\s+\*+\s*(?<last4>\d{4})\s+for\s+SGD\s*(?<amount>[\d,]+\.?\d*)'

// Pattern 2: "Card transaction: SGD <amount> at <merchant>"
r'Card\s+transaction:\s+SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 3: "HSBC Card ending <last4>: SGD <amount> spent at <merchant>"
r'HSBC\s+Card\s+ending\s+(?<last4>\d{4}):\s*SGD\s*(?<amount>[\d,]+\.?\d*)\s+spent\s+at\s+(?<merchant>.+?)(?:\.|$)'
Packages: com.uob.mighty / com.uob.mighty.app Default currency: SGDSupported notification formats:
A transaction of SGD 12.00 was made with your UOB Card ending 0161 on 17/03/26 at FUSION HUB - SIMEI
UOB Card ending 5678: SGD 25.30 at Starbucks
SGD 150.00 spent on UOB Card ending 5678 at Courts
Transaction of SGD 33.50 at Daiso. UOB Card ending 5678
Regex patterns (simplified):
// Pattern 1: "transaction of SGD <amount> ... on <date> at <merchant>"
r'transaction\s+of\s+SGD\s*(?<amount>[\d,]+\.?\d*).*?at\s+(?<merchant>[A-Z].+?)(?:\s*-\s*\w+)?(?:\.|$)'

// Pattern 2: "UOB Card ending <last4>: SGD <amount> at <merchant>"
r'UOB\s+Card\s+ending\s+(?<last4>\d{4}):\s*SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 3: "SGD <amount> spent on UOB Card ending <last4> at <merchant>"
r'SGD\s*(?<amount>[\d,]+\.?\d*)\s+spent\s+on\s+UOB\s+Card\s+ending\s+(?<last4>\d{4})\s+at\s+(?<merchant>.+?)(?:\.|$)'
Packages: com.citibank.mobile.sg / com.citibank.mobile.sgipb (IPB) Default currency: SGDSupported notification formats:
There was a charge of SGD2.16 on your Card ending 3990 by ShopBack Polar Puffs Singapore SGP on 19/03/26 17:20
Transaction alert: SGD 120.00 at Cold Storage
Citi Card ending 4321: SGD 89.90 charged at Guardian
SGD 55.00 was charged to your Citi card at Watsons
Regex patterns (simplified):
// Pattern 1: "charge of SGD<amount> on your Card ending <last4> by <merchant>"
r'charge\s+of\s+SGD\s*(?<amount>[\d,]+\.?\d*)\s+on\s+your\s+Card\s+ending\s+(?<last4>\d{4})\s+by\s+(?<merchant>.+?)(?:\s+on\s+\d|\.|$)'

// Pattern 2: "Transaction alert: SGD <amount> at <merchant>"
r'Transaction\s+alert:\s+SGD\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 3: "Citi Card ending <last4>: SGD <amount> charged at <merchant>"
r'Citi\s+Card\s+ending\s+(?<last4>\d{4}):\s*SGD\s*(?<amount>[\d,]+\.?\d*)\s+charged\s+at\s+(?<merchant>.+?)(?:\.|$)'
Package: com.google.android.apps.walletnfcrel Default currency: SGDCaptures tap-to-pay NFC transactions. The merchant name comes from the notification title; the amount and card are in the body.
Title: Starbucks
Body:  $10.90 with Visa ··8692

Title: NTUC FairPrice
Body:  SGD 43.20 with Mastercard ··1234

// Body pattern (amount + card suffix)
r'(?:SGD\s*|\$)(?<amount>[\d,]+\.?\d*)\s+with\s+(?:Visa|Mastercard|Amex)\s+··(?<last4>\d{4})'
// merchant = notification title
Google Wallet notifications don’t include the merchant in the body — the parser reads both title and text fields from the notification object.
Package: com.futu.moomoo Default currency: USD Transaction types: trade_buy, trade_sellCaptures US equity and options trades:
Order filled: Buy 5 AAPL at $185.20
Bought 10 TSLA @ $240.50. Order ID: 12345
Your Buy order for 3 MSFT has been filled at $380.00

// Pattern 1: "Order filled: <side> <qty> <ticker> at $<price>"
r'Order\s+filled:\s+(?<side>Buy|Sell)\s+(?<qty>\d+)\s+(?<ticker>[A-Z]+)\s+at\s+\$(?<price>[\d.]+)'

// Pattern 2: "Bought/Sold <qty> <ticker> @ $<price>"
r'(?<side>Bought|Sold)\s+(?<qty>\d+)\s+(?<ticker>[A-Z]+)\s+@\s+\$(?<price>[\d.]+)'
Moomoo trades are saved with transactionType: trade_buy or trade_sell and excluded from spend analytics (they appear in the portfolio module instead).

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India

Package: com.citi.citimobile Default currency: INRSupported notification formats:
INR 2,500.00 debited from your Citi Card ending 1234 at Amazon
Your Citi Card ending 1234 has been charged INR 850 at Swiggy
Transaction of INR 1,200 at Zomato on your Citi Card

// Pattern 1: "INR <amount> debited from your Citi Card ending <last4> at <merchant>"
r'INR\s*(?<amount>[\d,]+\.?\d*)\s+debited\s+from\s+your\s+Citi\s+Card\s+ending\s+(?<last4>\d{4})\s+at\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 2: "Citi Card ending <last4> has been charged INR <amount> at <merchant>"
r'Citi\s+Card\s+ending\s+(?<last4>\d{4})\s+has\s+been\s+charged\s+INR\s*(?<amount>[\d,]+\.?\d*)\s+at\s+(?<merchant>.+?)(?:\.|$)'
Package: com.axis.mobile Default currency: INR Supported amount formats: INR, Rs, Rs., ₹Supported notification formats:
INR 2,500 debited from A/c XX1234 to Amazon
Rs 1,200.50 spent at Flipkart on Axis Card ending 9876
Axis Bank: ₹500 paid to Zomato via UPI

// Pattern 1: "INR <amount> debited from A/c <acc> to <merchant>"
r'INR\s*(?<amount>[\d,]+\.?\d*)\s+debited\s+from\s+A\/c\s+[A-Z\d]+\s+to\s+(?<merchant>.+?)(?:\.|$)'

// Pattern 2: "Rs <amount> spent at <merchant>"
r'Rs\.?\s*(?<amount>[\d,]+\.?\d*)\s+spent\s+at\s+(?<merchant>.+?)(?:\s+on\s+Axis|\.|$)'

// Pattern 3: "₹<amount> paid to <merchant> via UPI"
r'₹\s*(?<amount>[\d,]+\.?\d*)\s+paid\s+to\s+(?<merchant>.+?)\s+via\s+UPI'
Package: com.phonepe.app Default currency: INRSupported notification formats:
Paid ₹450 to Swiggy via UPI
₹1,200 sent to Rahul Kumar. UPI Ref: 123456
Payment of ₹350.00 to BigBasket successful

// Pattern 1: "Paid ₹<amount> to <merchant> via UPI"
r'Paid\s+₹\s*(?<amount>[\d,]+\.?\d*)\s+to\s+(?<merchant>.+?)\s+via\s+UPI'

// Pattern 2: "₹<amount> sent to <name>"
r'₹\s*(?<amount>[\d,]+\.?\d*)\s+sent\s+to\s+(?<merchant>.+?)(?:\.\s+UPI|\.|$)'

// Pattern 3: "Payment of ₹<amount> to <merchant> successful"
r'Payment\s+of\s+₹\s*(?<amount>[\d,]+\.?\d*)\s+to\s+(?<merchant>.+?)\s+successful'
Package: com.zerodha.kite Default currency: INR Transaction types: trade_buy, trade_sellCaptures NSE/BSE equity and F&O trades:
Order executed: Buy 10 RELIANCE at ₹2,450.00
Buy order for 5 TCS executed at ₹3,500
Trade: Sold 20 INFY @ ₹1,800.50

// Pattern 1: "Order executed: <side> <qty> <ticker> at ₹<price>"
r'Order\s+executed:\s+(?<side>Buy|Sell)\s+(?<qty>\d+)\s+(?<ticker>[A-Z]+)\s+at\s+₹\s*(?<price>[\d,]+\.?\d*)'

// Pattern 2: "<side> order for <qty> <ticker> executed at ₹<price>"
r'(?<side>Buy|Sell)\s+order\s+for\s+(?<qty>\d+)\s+(?<ticker>[A-Z]+)\s+executed\s+at\s+₹\s*(?<price>[\d,]+\.?\d*)'

// Pattern 3: "Trade: Sold/Bought <qty> <ticker> @ ₹<price>"
r'Trade:\s+(?<side>Sold|Bought)\s+(?<qty>\d+)\s+(?<ticker>[A-Z]+)\s+@\s+₹\s*(?<price>[\d,]+\.?\d*)'

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ParsedTransaction fields

Every successful parse produces a ParsedTransaction object: 
ParsedTransaction({
  required double amount,         // e.g. 45.50
  required String currency,       // 'SGD', 'INR', 'USD'
  String? merchant,               // 'Grab', 'Starbucks' (null for trades)
  String? ticker,                 // 'AAPL', 'RELIANCE' (trades only)
  int? quantity,                  // shares/units (trades only)
  String? cardLast4,              // '1234'
  required String transactionType,// 'debit', 'credit', 'trade_buy', 'trade_sell'
  required String source,         // package name
  required DateTime timestamp,
})
Trades (trade_buy, trade_sell) are excluded from the Spend Hub and routed to the Portfolio module.

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Claude Haiku fallback

When no regex matches, the raw notification text is sent to Claude Haiku with this prompt: 
Extract transaction details from this bank notification.
Return JSON: {"amount": float, "currency": "SGD"|"INR"|"USD",
              "merchant": string|null, "type": "debit"|"credit"}

Notification: "<raw text>"
Haiku is accurate for novel notification formats and costs < $0.001 per parse. Successful Haiku parses are logged to help identify patterns worth adding to the regex library.

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Adding a new bank

Want your bank supported? Here’s how: Step 1 — Find the package name: 
# Enable developer options on Android, then:
adb logcat | grep "Notification posted"
# Look for the packageName field when a notification arrives
Step 2 — Add BankingAppPattern to notification_parser.dart: 
'com.yourbank.app': BankingAppPattern(
  packageName: 'com.yourbank.app',
  bankName: 'Your Bank',
  region: 'SG',
  defaultCurrency: 'SGD',
  patterns: [
    RegExp(
      r'Amount:\s*SGD\s*(?<amount>[\d,]+\.?\d*)\s*at\s*(?<merchant>.+?)(?:\.|$)',
      caseSensitive: false,
    ),
  ],
),
Step 3 — Add the package name to BANKING_PACKAGES in VantageNotificationListener.kt. Step 4 — Open a PR with example notification strings (anonymised) in the description. Full guide: CONTRIBUTING.md → Adding a New Banking App