Brian Mena
All cases

Lucy, own project

Lucy

Your finances and your business in one place, even offline

The figures

DownloadsLucy 1 + Lucy 2
30,000+
Works offlineno internet dependency
100%
Support sinceTelegram group
2021

The problem

Many Cuban entrepreneurs still keep their books in paper notebooks, and apps built for other markets rely on a stable connection. On top of that, Lucy 1 left some users unable to recover their data when changing phones.

What I did

Lucy 2 was rebuilt from scratch with Expo and React Native, with local SQLite as the source of truth, so everything works offline. Supabase is optional and only used for the account, encrypted cloud backup and licensing. Backups are encrypted with AES-256-GCM and an importer brings over your Lucy 1 data.

The same, for your business

  • A clinic that shows up first when people search «dentist near me».
  • A garage that gets calls from Maps.
  • A law firm that comes up when someone asks an AI assistant.
Technical details

Tech stack

  • Expo
  • React Native
  • TypeScript
  • SQLite
  • Supabase

Features

  • For your business (Lucy Pro, with a 14-day free trial): see today's profit with no math, charge in seconds by searching or scanning, and track inventory and credit sales (fiado) with reminders
  • Your month at a glance, with CUP, USD, EUR and MLC and the exchange rate saved on every transaction
  • Debt reminders, for both what you are owed and what you owe
  • Works without internet, with an encrypted backup so you can change phones without losing anything
  • Free Excel export forever, plus an importer for your Lucy 1 data
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