Contu · Personal finance · PWA

Envelope budgeting, on‑device

Savings goals, income split into envelopes and fast expense logging, private by default.

Role
Design + build, solo
Platform
Installable web app
Data
On-device first
Read
2 min
Open Contu

Results

  • Livecontu.persona93.com
  • Solodesigned and built end to end
  • Localby default; cloud sync is an option

The problem

Budgeting apps want an account, bank logins and your data on their servers. Envelope budgeters, often juggling currencies, just need goals, envelopes and fast logging.

Key decisions

  1. Contu welcome: choose your main currency, all on your device
    01

    Local-first, private by default

    Everything stays on the device unless you choose cloud sync, a paid plan with an account.

    Local first over cloud first, for financial and data privacy.

  2. Five envelopes with their percentage split and balances in COP and USD
    02

    Income splits into envelopes

    Each paycheck divides by percentage into envelopes, while banks and cards still hold the real money.

  3. Add-expense sheet converting 180,000 COP to about 46 USD
    03

    Two currencies, one budget

    Earn in dollars, spend in pesos: type a price in either and the app converts at a rate you can edit.

  4. Onboarding step three: how your income divides
    04

    Three steps to value

    Currency, goal, accounts. The last step shows exactly how your income will divide.

Contact

Want the full story?

keduarts@gmail.com