TripTally: Smart Bill & Expense Splitter
Offline-First Travel Bill Splitter with Zero-Pennies-Lost Precision
Built Different from Traditional Apps
Never Stalled by Poor Signal
Built offline-first with an internal SQLite database. Add expenses in remote mountains, on flights, or during road trips without an internet connection.
Zero-Pennies-Lost Guarantee
Uses the mathematical Hamilton-Hare Largest-Remainder Method to distribute rounding remainders deterministically — your group balances always match the bill to the exact cent or paisa.
Your Data Belongs to You
No third-party servers tracking your purchases. Backups go straight to your own hidden Google Drive folder (appDataFolder).
How It Works in 3 Simple Steps
Create a Trip
Pick a name, emoji, currency (₹, $, €, £, ¥, etc.), and invite travel companions or friends.
Log Expenses On The Go
Add bills, choose equal, itemized, or custom splits, and let TripTally calculate shares in real time.
Settle Up with 1 Tap
View simplified payment instructions and share the final debt balance straight to WhatsApp or Telegram.
About TripTally
Most expense splitters require mandatory accounts, spam you with subscription paywalls, or lock basic features like receipts and PDF exports behind subscriptions. TripTally is built differently from the ground up.
Built offline-first with an internal SQLite (Drift) database, you can log group expenses atop remote mountain peaks, on international flights, or during road trips without an internet connection.
Using the mathematical Hamilton-Hare Largest-Remainder Method, rounding remainders are distributed deterministically so group balances match your real-world receipt to the exact cent or paisa. When the trip ends, a greedy creditor/debtor graph engine collapses dozens of messy cross-debts down to at most N-1 simple payments with one-tap WhatsApp sharing.
Key Highlights & Capabilities
Hamilton-Hare Exact Splitter
Zero pennies lost using mathematical remainder distribution across all group members.
Greedy Debt Minimization
Collapses tangled cross-debts into the fewest possible payments (at most N-1).
Itemized Restaurant Bills
Add dishes, drinks, tax, and tips with proportional food allocation.
100% Offline SQLite Architecture
Log expenses with zero signal anywhere on earth, backed by on-device SQLite (Drift).
Private Google Drive Backup
Encrypted snapshots stored in your personal Google Drive appDataFolder with zero tracking servers.
Portable .triptally File Sharing
Share whole trips as portable files for instant import on friends' devices.
Explore Everything Inside TripTally
🍕 Advanced Bill Splitting Modes
Split evenly among all or selected members with a single tap.
Type exact custom amounts for each person with instant balance checking.
Split by custom % with real-time 100% total validation.
Perfect for families and couples (e.g., 2 adults + 1 child = 2:2:1 ratio).
Add dishes, drinks, and quantities. Assign individual items or share starters among subsets of friends.
Enter tax/tips as a percentage or fixed amount; TripTally allocates them proportionally to each person’s food total or splits them equally.
Supports multiple members paying parts of a single bill effortlessly.
⚡ Debt Simplification Engine ("Settle Up")
Greedy creditor/debtor algorithm reduces dozens of entangled debts down to the fewest possible payments (at most N-1 payments).
Toggle instantly to see direct, unsimplified person-to-person debts.
One-tap shareable summary to paste into your travel WhatsApp or Telegram group.
Mark debts as paid and maintain an unalterable payment audit trail.
📊 Budgets & Spending Alerts
Set an overall spending cap for the entire trip.
Set dedicated budgets for Food, Transport, Accommodation, Activities, and Shopping.
Prevents category budgets from exceeding the total trip budget.
Color-coded progress bars (Green → Amber → Red) that warn you before you overspend.
📈 Visual Analytics
Interactive donut/pie chart of your spending by category.
Bar chart showing expenditure day-by-day across your entire itinerary.
Total trip cost, average daily burn rate, and top contributor breakdowns.
📄 Professional Exports & Sharing
Clean, branded PDF reports containing trip summaries, itemized expenses, category splits, and final settlement balances.
One-tap CSV export compatible with Microsoft Excel, Google Sheets, and Numbers.
Export your trip as a compressed, portable .triptally file. Friends can import it directly into their own TripTally app to inspect the full trip offline!
☁️ Private Google Drive Cloud Sync
Stores data inside the user's private Google Drive appDataFolder — TripTally never touches other Drive files.
Silently syncs whenever trips or expenses are created or updated.
Create timestamped rollback checkpoints before making major changes.
Cleanly Replace existing data or intelligently Merge missing trips without duplicate IDs.
Frequently Asked Questions
Is TripTally really free?
Yes! TripTally is 100% free with no hidden subscriptions, no feature paywalls, and no ads.
Do I need an internet connection to use TripTally?
Not at all. TripTally is fully offline. Internet is only used if you choose to connect your Google Drive for cloud backup.
How does the Google Drive backup work?
When connected, TripTally uploads an encrypted JSON snapshot directly to your personal Google Drive hidden app folder (appDataFolder). It uses your free Google storage and is completely private.
Can my friends import my trip data?
Yes. You can export a .triptally file and send it via WhatsApp, Telegram, or AirDrop. When your friend taps the file, it opens TripTally and imports the entire trip with all expenses, splits, and settlements.