Work

My apps & games studio

Boiled Eggs is home to my apps and games. The product catalogue lives on the studio website; TONKO stays here as a closer look at my work.

My independent studio

Boiled Eggs Studio

Boiled Eggs is where I build my own apps and games. From the idea and design to Android, backend and release, the studio is home to those products and their continued development.

Visit the studio hello@boiledeggs.studio

Android app Launching

TONKO

Money habits for kids, with parents in control. Jobs, three jars, savings goals and short lessons, wrapped in one Android app with a parent side behind a PIN and a calm kid side.

Kotlin
Android
NestJS
PostgreSQL
Next.js

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Product notes

Notes from building TONKO

All product notes

TONKO feature graphic with the Tonko mascot

Apps Sep 20, 2026 5 min read

Building TONKO: A Pocket-Money App Where Parents Approve Everything

TONKO is an Android app for kids' first money habits. Here is why it has no bank card, why prices are hidden from children, and how one app serves a parent, a child, and a shared phone.

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