A mobile app for tracking mutual fund investments (SIPs) without creating any account or sharing personal data. All calculations, data storage, and rendering happen locally on your device. The app connects to public APIs only to fetch mutual fund price data (NAV). Once cached, the app works fully offline. No server, no user account, no login screen. You install the app and it works.
A look inside how the app is built: the decisions, trade-offs, and engineering that makes it work.
No server, no account, no tracking. Three-layer architecture with strict separation of concerns.
No server, no login, no account. All data stays on device. Uninstall = zero traces.
3-layer strict architecture: Pages → Hooks → Services. Pages never call APIs directly.
5 self-contained feature modules (dashboard, funds, portfolio, tools, settings).
Biometric lock, hardware-backed security, and smart caching that never shows a spinner twice
Biometric auth with PIN fallback. Auto-locks on background, app switcher blur for privacy.
3 caching layers: MMKV (raw data), Zustand (user data), React Query (API dedup). Golden rule: cache exists → show instantly.
Portfolio computations cached in MMKV, loaded synchronously before first render.
Interactive NAV charts with touch gestures, plus three fully offline financial calculators
Custom SVG chart with pinch-zoom, pan, long-press crosshair. Toggle bar/line view. All from cached NAV data.
SIP Calculator, Goal Planner, Lumpsum Calculator — all offline with real-time slider updates. Share as image.
Comparison mode: two fund charts overlaid with synchronized zoom. Winner highlighted per period.
Full data portability with JSON export/import, PDF reports, and हिन्दी/English i18n
Export portfolio as structured JSON (SIPs, watchlist, goals, settings). PDF report with XIRR and fund breakdown.
Import validates schema, checks codes, partial import on errors — valid entries go through.
Full हिन्दी + English. Auto-detects system language. Locale-aware formatting: लाख/करोड़ or K/M/B.
Open the app and start tracking. No email, no password, no OTP. All data stays on your phone. Uninstall and every trace vanishes.
Lock the app with your fingerprint or face. Auto-locks when you leave. PIN fallback if biometrics don't work.
Add your mutual fund SIPs and see their value instantly. The app calculates XIRR, total invested, and returns for each SIP and your whole portfolio.
Custom charts that support pinch to zoom, pan, and long press to see NAV on any date. Switch between 1M to 5Y views. Toggle bar or line chart.
All fund data is cached on your phone. Search 37,000+ funds instantly with no internet. Filter by category and sort by name or NAV.
Pick two funds and compare them. See NAV, returns, fund house, and expense ratio side by side. The better value is highlighted in green.
Three calculators that work offline. SIP calculator with annual step up. Goal planner tells you how much to save each month. Share results as an image.
Once data is loaded, it shows instantly on your next visit. No loading spinners, no waiting. Refresh happens silently in the background.
Export your portfolio as a JSON file. Share it over email or WhatsApp. Import on another phone to restore everything.
Generate a PDF of your portfolio with current value, XIRR, and fund wise breakdown. Share or save it from the share sheet.
Take a screenshot of your portfolio or chart. The app adds a clean header and opens the share sheet. Share on WhatsApp or save to your gallery.
Full Hindi (हिन्दी) and English support. Switch languages anytime in settings. All text, labels, and errors are translated. Auto detects your system language on first launch.