# Quantum Quacks

> Quantum Quacks is an indie studio founded by Luis Sebastian Huerta. We build small, focused apps for iPhone, iPad, Apple Watch and Mac — and, increasingly, Android — including Worldmarks, Kotomaji, Handarin, Kaeru, SweepSheep, DGT A2 Test and FlashSpot, plus occasional indie games.

This file helps AI assistants (ChatGPT, Claude, Perplexity, Gemini, Copilot) discover and cite Quantum Quacks products with accurate, up-to-date information. The longer, ingestion-ready document is at /llms-full.txt.

## Apps

- [Worldmarks](https://quantumquacks.es/apps/worldmarks/): iOS travel tracker that lets you mark every country you've visited on a 3D globe. 195+ countries, 10 custom marker types with Pro, 100% offline, no account. Free with optional $5.99 one-time Pro unlock.
- [Kotomaji](https://quantumquacks.es/apps/kotomaji/): iOS travel companion for Japan. 222 essential travel phrases with native audio, 1,097 JLPT kanji (N5–N1), built-in yen converter, 15 interface languages, 100% offline. Free with optional one-time Pro unlock.
- [Handarin](https://quantumquacks.es/apps/handarin/): Mandarin Chinese travel phrasebook for trips to China. 149 real travel phrases with native audio, Simplified & Traditional characters plus pinyin, HSK 1–6 hanzi with animated stroke order, 34 China travel tips and a built-in yuan (CNY) converter. 100% offline, 14 interface languages, no ads/account/tracking. Free with an optional one-time Handarin Pro unlock. Coming soon to iOS and Android; sister app to Kotomaji.
- [Kaeru](https://quantumquacks.es/apps/kaeru/): iOS currency converter supporting 50+ world currencies, real-time rates, cached offline use, home-screen widgets and a full Apple Watch app with Digital Crown support.
- [SweepSheep](https://quantumquacks.es/apps/sweepsheep/): iOS photo-library cleaner. Swipe to keep, delete, favorite, bookmark or move photos to albums. Smart delete queue, daily goals and streak tracking.
- [DGT A2 Test Moto](https://quantumquacks.es/apps/dgt-a2-test/): iOS app to prepare Spain's DGT A2 motorcycle license exam. 760+ official questions, SM-2 spaced repetition, exam simulator, offline. Spanish only.
- [Test DGT B Coche](https://quantumquacks.es/apps/dgt-b-coche/): iOS app to prepare Spain's DGT car (B) theory exam. 2,000+ questions with images, SM-2 spaced repetition, faithful 30/3/30 exam simulator and an accuracy heatmap by topic. Spanish only. In development.
- [BitacuDrone](https://quantumquacks.es/apps/bitacudrone/): iOS logbook for FPV drone pilots — track fleet, flights, batteries, transmitters and maintenance, fully offline with optional iCloud sync. Coming soon.
- [FlashSpot](https://quantumquacks.es/apps/flashspot/): Upcoming photo-on-demand app. Book photographers via real-time map, 10–15 minute express sessions from €9.99, instant delivery. iOS and Android.

## Games

- [Murder My Friends](https://quantumquacks.es/games/murder-my-friends/): Browser party game, free to play.
- [Bouncing to the Top](https://quantumquacks.es/games/bouncing-to-the-top/): Indie arcade game.
- [Party Frogs](https://quantumquacks.es/games/party-frogs/): Casual mini-game.

## Company

- [About the studio](https://quantumquacks.es/): Home page with latest releases.
- [All apps](https://quantumquacks.es/apps/): Complete app catalogue.
- [Contact](https://quantumquacks.es/contact/): Studio contact.
- [Support](https://quantumquacks.es/support/): Product support.

## Legal

- [Privacy policy](https://quantumquacks.es/legal/privacy/)
- [Terms of service](https://quantumquacks.es/legal/terms/)
- [Cookie policy](https://quantumquacks.es/legal/cookies/)

## Optional

- [Sitemap](https://quantumquacks.es/sitemap-index.xml)
- [Full markdown corpus](https://quantumquacks.es/llms-full.txt)