TauxLive
Freemium mobile app targeting African markets where official exchange rates and street rates diverge. Converts between 31 currencies (15 African: XAF, XOF, NGN, RWF, KES, GHS, ZAR, ETB, EGP, MAD…) with a toggle between official and parallel/black market rates. Includes a transfer fee comparator for MTN MoMo, Airtel Money, Western Union, and Wise, offline-first SQLite cache, push-notification rate alerts via Supabase Edge Function cron, 7/30/365-day history charts, and a built-in calculator. Available in 5 languages: FR, EN, AR, SW, PT.
My Role
Founder, full-stack mobile developer
Year
2026
Timeline
Architecture, rate data pipeline, parallel market toggle, fee comparator, alerts cron, store submission
Currency converter
Official and parallel rates, transfer fees, and alerts in one app.
Converter
Rate toggle
Fee comparator
Alerts
31
Currencies
15
African
5
Languages
The Need
Generic currency apps only show official rates. In most African markets the real transactional rate is the parallel one, and comparing mobile money transfer fees requires checking each provider manually.
The Solution
A single app that exposes both official and parallel rates with a one-tap toggle, compares transfer fees across Mobile Money providers, and sends personalized rate alerts even when the app is closed.
Impact
v1.0.1 live on iOS App Store (approved 11 Sept 2026). Android Alpha closed on Google Play. Freemium model: AdMob + RevenueCat subscriptions (Premium $4.99/yr, Premium+ $9.99/yr).
Key Features
- Official vs parallel market rate toggle
- 31 currencies (15 African) with real-time updates
- Mobile Money transfer fee comparator (MoMo, Airtel, WU, Wise)
- Push-notification rate alerts via Supabase Edge Function cron
- Offline-first with SQLite cache
- 7/30/365-day history charts (Victory Native)
- Built-in calculator, 5-language support
Technical Choices
- Parallel rates as a first-class feature — that is the differentiation, not an afterthought.
- SQLite cache makes the app useful in low-connectivity zones before data refreshes.
- Supabase Edge Function cron delivers alerts server-side so the app doesn't need to stay open.
- RevenueCat centralizes subscription state across iOS and Android for the future dual-store release.
Future Updates
- Launch Android on Google Play (move out of closed Alpha)
- Add more African parallel rate sources
- Add portfolio tracker for multi-currency savings
Screenshots
