# Paintingstack

> Software studio in Chile. Builds its own apps for iPhone, iPad, Mac, and Android. Enjoy the craft.

Paintingstack is a software studio founded by Gregorio Undurraga. The tagline, "Enjoy the craft," means what it says: every app is built with care, opinionated, private by default, and free of ads and dark patterns. Where an app is paid, it is a one-time purchase, never a subscription for a tool that runs on your own device.

## Apps

- [Kountrain](https://paintingstack.com/kountrain): Bodyweight exercise tracker for push-ups, squats, planks, pull-ups, lunges, and burpees. Set goals, build streaks, see progress. No account, works offline. iPhone, iPad, and Android.
- [Undertone](https://paintingstack.com/undertone): Color analysis for painters, photographers, and designers. Point your phone at anything and see the color structure underneath, the palette with proportions, color harmony, warm-cool temperature, and value structure. Runs on-device. iPhone and iPad.
- [Overgrid](https://paintingstack.com/overgrid): The grid method, digital. Overlay a precision grid on any reference photo to transfer proportions to canvas, panel, or paper, with custom colors, diagonals, and value studies. iPhone, iPad, Mac, and Android.
- [Trazu](https://paintingstack.com/trazu): A painting app with real paint physics. Brushes load, deplete, and mix wet color on the canvas across six mediums and nine paper textures, with value, temperature, and saturation views built into the canvas. Offline and private. iPhone and iPad.
- [Mintza](https://paintingstack.com/mintza): Practice speaking a new language in a real, open voice conversation with a bilingual AI teacher that talks back like a person and helps you in your own language when you get stuck. Fifteen languages. iPhone, iPad, and Mac.
- [Cleangarden](https://paintingstack.com/cleangarden): A Chrome extension that sorts any YouTube playlist by views, duration, date, or title, from a side panel that stays open while you browse. Free, no ads.

## Blog

The Paintingstack blog covers the craft behind the apps: color theory, painting technique, the grid method, bodyweight training, language learning, and composition. Written to be genuinely useful, not to sell. Published in English, Spanish, Italian, French, German, Portuguese, Japanese, and Korean.

- [Blog](https://paintingstack.com/blog)

## Links

- [Gregorio Undurraga](https://gregorioundurraga.com): Founder's personal site and painting gallery
- [GitHub](https://github.com/paintingstack)
- [LinkedIn](https://www.linkedin.com/company/paintingstack-studio/)
- [X / Twitter](https://x.com/paintingstack)
- [Instagram](https://www.instagram.com/paintingstack/)
- [TikTok](https://www.tiktok.com/@paintingstack)
- [YouTube](https://www.youtube.com/@paintingstack)

## Contact

- Email: hello@paintingstack.com