Focused apps. Ninety days. One system.

I'm Evgeny — I build focused, useful apps for iPhone, iPad and Mac, and I write about how.

Browse the apps How I build them

Live

on the App Store

Q1 2026

built in ninety days

30+

languages per app

EXAM PREP

Study for a real licence.

Patente Nautica

Italy's boating licence — 1,470 official questions in 29 languages, offline, synced via iCloud.

Exam prep iPhone · iPad · Mac

Italy's driving-licence theory test, question by question.

The UK construction-site health, safety and environment test.

CCSE 2026 Study Guide

Spain's constitutional and cultural knowledge test for citizenship.

Fischerprüfung Bayern 2026

The Bavarian fishing-licence exam.

Citizenship Test Germany 2026

The Einbürgerungstest, with the current official question set.

French Civic Exam Quiz 2026

France's civic knowledge exam for residency and citizenship.

UTILITIES

Small tools that do one job.

Track energy use and cost, offline, on every device.

eXpense — Money Tracker

Expenses without a subscription or an account.

Interval Timer — Focus & HIIT

Focus sessions and interval training, one timer.

Tempus Time — Work Hours Log

Log working hours and export them, nothing else.

Four more are built and in review. All apps on the App Store →

HOW I BUILD

The system behind the speed.

Shipping that fast wasn't speed for its own sake — it was a system. Using Claude Code as the primary development tool: 45-minute focused sessions (94% success rate across 297 tracked sessions), structured context saves that give the model persistent memory between sessions, one shared Swift package behind every app for analytics, crash reporting and monetisation, and pre-flight checklists that cut App Store rejections in half.

922 commits in 3 months. I build the apps and the system that builds them.

The workflow on GitHub

SUPPORT

Something not working?

Write to [email protected] with the app name and your device. I reply within a day. Each app's privacy policy is linked from its App Store page.