12 apps · iPhone & iPad · Free

All apps by Sergei Lazarenko

Every app published on the App Store, grouped by what it helps you do. Open any app for a full guide: features, who it is for, how it works, FAQ and technical details.

Education & Learning

Learn chess, master road signs and pass the driving-theory exam with structured lessons and quizzes.

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Chess Learn and Play Interactive chess book with puzzles, lessons and games by world champions. Education & Learning Free · Pro upgrade ★ 5.0 iPhone

RoadWise: Road Signs & Parking Complete road-sign reference with quizzes and an odd/even parking helper. Education & Learning Free iPhone

PDD Tickets 2025: GAI Exam All official 2025 Russian driving-theory tickets with explanations and an exam simulator. Education & Learning Free iPhone

Productivity & Utilities

Small tools that save time: AI prompt libraries, keyboard personalization and smart calculators.

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AI Prompts Helper & Generator Thousands of curated prompts for ChatGPT, Claude and Gemini, with search, favorites and community ratings. Productivity & Utilities Free · Premium iPhone · iPad

Custom Keyboard Themes Personal iPhone keyboard with themes, stylish fonts, kaomoji and special symbols. Productivity & Utilities Free iPhone

BBQ | Meat Recipes & Calculator Calculate exactly how much meat, veg and sides to buy for any barbecue, then shop from an auto-generated list. Productivity & Utilities Free · Premium ★ 4.0 iPhone · iPad

Business & Invoicing

Invoices and estimates for contractors and small businesses, made on the job site in under a minute.

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Jobdoc: Estimate Invoice Maker Make a clean PDF invoice or estimate in under a minute, right on the job site and even offline. Business & Invoicing Free · Pro upgrade Coming soon iPhone · iPad

Personal Finance

Keep every cashback card and category at hand and always pay with the right one.

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All Cashback: Credit Cards See which of your bank cards gives the most cashback right now, with a Home Screen widget and monthly reminders. Personal Finance Free iPhone

Lifestyle & Wellbeing

Wallpapers that match your mood and a calm space for breathing, meditation and gratitude journaling.

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Wallpapers: Match Your Mood High-resolution iPhone wallpapers with realistic Lock Screen and Home Screen previews. Lifestyle & Wellbeing Free · Premium ★ 3.3 iPhone

Self-care: My Diary Journal Short guided meditations, 4-7-8 and box breathing, a gratitude journal and relaxing sleep sounds. Lifestyle & Wellbeing Free iPhone

Puzzle & Word Games

Offline brain teasers you can play anywhere: Hangman and 2048 with modern twists.

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Hangman: Guess Word Game Classic Hangman with a hand-drawn notebook look, themed categories and offline play in six languages. Puzzle & Word Games Free iPhone

2048 Logic Puzzle Match The classic 2048 puzzle with board sizes from 3×3 to 8×8, swipe or motion control, and offline play. Puzzle & Word Games Free iPhone