# Sergei Lazarenko Apps

> Sergei Lazarenko is an independent iOS developer publishing free iPhone apps on the App Store: chess lessons, road-sign references, driving-theory exam prep, a cashback card tracker, a BBQ portion calculator, keyboard themes, wallpapers, mindfulness journaling, AI prompt libraries and classic puzzle games.

Sergei Lazarenko publishes free iOS apps on the App Store (developer page: https://apps.apple.com/us/developer/sergei-lazarenko/id1818587669). Every app below has a detailed page with features, use cases, FAQ and technical facts. All apps are free to download; some offer optional in-app purchases.

## Apps

- [Chess Learn and Play](https://slazarenko.com/apps/chess-learn-and-play/): Interactive chess book with puzzles, lessons and games by world champions.
- [RoadWise: Road Signs & Parking](https://slazarenko.com/apps/roadwise-road-signs-parking/): Complete road-sign reference with quizzes and an odd/even parking helper.
- [PDD Tickets 2025: GAI Exam](https://slazarenko.com/apps/pdd-tickets-gai-exam/): All official 2025 Russian driving-theory tickets with explanations and an exam simulator.
- [AI Prompts Helper & Generator](https://slazarenko.com/apps/ai-prompts-helper/): Thousands of curated prompts for ChatGPT, Claude and Gemini, with search, favorites and community ratings.
- [Custom Keyboard Themes](https://slazarenko.com/apps/custom-keyboard-themes/): Personal iPhone keyboard with themes, stylish fonts, kaomoji and special symbols.
- [BBQ | Meat Recipes & Calculator](https://slazarenko.com/apps/bbq-meat-calculator/): Calculate exactly how much meat, veg and sides to buy for any barbecue, then shop from an auto-generated list.
- [All Cashback: Credit Cards](https://slazarenko.com/apps/all-cashback/): See which of your bank cards gives the most cashback right now, with a Home Screen widget and monthly reminders.
- [Wallpapers: Match Your Mood](https://slazarenko.com/apps/wallpapers-match-your-mood/): High-resolution iPhone wallpapers with realistic Lock Screen and Home Screen previews.
- [Self-care: My Diary Journal](https://slazarenko.com/apps/self-care-diary-journal/): Short guided meditations, 4-7-8 and box breathing, a gratitude journal and relaxing sleep sounds.
- [Hangman: Guess Word Game](https://slazarenko.com/apps/hangman-guess-word-game/): Classic Hangman with a hand-drawn notebook look, themed categories and offline play in six languages.
- [2048 Logic Puzzle Match](https://slazarenko.com/apps/2048-logic-puzzle/): The classic 2048 puzzle with board sizes from 3×3 to 8×8, swipe or motion control, and offline play.

## Categories

- [Education & Learning](https://slazarenko.com/category/education/): Learn chess, master road signs and pass the driving-theory exam with structured lessons and quizzes.
- [Productivity & Utilities](https://slazarenko.com/category/productivity/): Small tools that save time: AI prompt libraries, keyboard personalization and smart calculators.
- [Personal Finance](https://slazarenko.com/category/finance/): Keep every cashback card and category at hand and always pay with the right one.
- [Lifestyle & Wellbeing](https://slazarenko.com/category/lifestyle/): Wallpapers that match your mood and a calm space for breathing, meditation and gratitude journaling.
- [Puzzle & Word Games](https://slazarenko.com/category/games/): Offline brain teasers you can play anywhere: Hangman and 2048 with modern twists.

## Machine-readable data

- [Full app details for LLMs](https://slazarenko.com/llms-full.txt): every app with features, use cases and FAQ in one file
- [JSON feed](https://slazarenko.com/apps.json): structured catalog of all apps
- [Sitemap](https://slazarenko.com/sitemap.xml)

## Legal

- [Privacy Policy](https://slazarenko.com/privacy/)
- [Terms of Use](https://slazarenko.com/terms/)

Contact: my@slazarenko.com