# lvrpiz app studio

> Independent app studio by Álvaro García Pizarro (lvrpiz). Privacy-first iOS
> apps and web tools, originally built to solve my own problems and published
> in case they help someone else. Every app processes data locally on device:
> no accounts, no tracking, no servers, no analytics.

## Apps

- [Tweny](https://apps.apple.com/us/app/tweny/id6756274546): Protect your eyes with the 20-20-20 rule. Prevent fatigue and stay focused with customizable timers and Live Activities. Platform: iOS. Category: HealthApplication. Price: free.
- [Stress Tracker HRV](https://stressapp.lvrpiz.com): Stress tracking with Apple Watch HRV. Monitor your stress and improve your well-being. Platform: iOS. Category: HealthApplication. Price: free.
- [Lapis](https://apps.apple.com/us/app/ai-offline-llm-chat-lapis/id6754216427): Local AI offline & secure chat assistant. Ask anything, no internet needed. Platform: iOS. Category: ProductivityApplication. Price: free.

## Projects

- [lvrpiz Talk Assets](https://github.com/alvarogarciapiz/assets): Materials, presentations, and resources from my talks and public speaking engagements.
- [AWS Practice Portal](https://aws-p2.lvrpiz.com): Master AWS certifications with interactive practice scenarios and detailed explanations.
- [Sun Exposure: Time in Daylight](https://timeindaylight.lvrpiz.com): Monitor your sun exposure, boost mood, improve Vitamin D, and improve your well-being.
- [IntelliTweet](https://github.com/alvarogarciapiz/IntelliTweet): Intelligent Twitter automation with advanced scheduling and analytics.
- [CORS Visualizer](https://cors-visualized.lvrpiz.com): Interactive visualization tool for understanding and debugging CORS policies.
- [Subnet Calculator](https://apps.apple.com/us/app/subnet-calculator-192/id6748156871): Subnet and IP calculator for students and professionals. Fast, simple, and reliable.

## Pages

- [Home](https://apps.lvrpiz.com/): Full list of apps and projects.
- [Support](https://apps.lvrpiz.com/support): Contact form, response times, how to report bugs.
- [Privacy & Terms](https://apps.lvrpiz.com/privacy-and-terms): Data handling policy and terms of use.

## About

- Author: Álvaro García Pizarro — Cloud, DevOps and AI engineer based in Valladolid, Spain.
- Personal site: https://www.lvrpiz.com
- Newsletter (Spanish, weekly): https://www.blog.lvrpiz.com
- Contact: hello@lvrpiz.com
- Source: https://github.com/alvarogarciapiz

## Notes

- All apps are free and available on the Apple App Store.
- No app collects, stores or transmits personal data.
- Health data (Stress Tracker HRV, Sun Exposure) is read from Apple Health
  with explicit permission and never leaves the device.
- Last updated: 2026-08-25

## Privacy policy (full text)

No data collection: a strict no-data-collection policy applies to every
application. Personal information, usage patterns and interactions stay on the
device.

Local processing: all processing happens exclusively on the device. No user
information is collected, stored or transmitted to external servers. Data never
leaves the device unless the user explicitly shares it through standard iOS
system features.

Health data: apps such as Stress Tracker HRV and Sun Exposure read from Apple
Health only with explicit permission, and only to display the user's own
metrics inside the app. That data is never transmitted off the device, and
access can be revoked at any time from the iOS Settings app.

Third-party services: the applications integrate no third-party analytics,
tracking or advertising services. No cookies or trackers are used. Purchases
and downloads are handled by Apple under Apple's own privacy policy.

This website: sets no cookies and runs no analytics. Fonts are served from the
site's own domain rather than a third-party CDN.

Terms of use: apps distributed through the App Store are covered by Apple's
Standard End User License Agreement. They are provided as-is, without warranty
of any kind.

## Support (full text)

Response time: every message gets answered as soon as possible. This is a
one-person studio, so it may take a few days.

Bug reports: include device model, iOS version, and the steps to reproduce the
issue.

Feature requests: feedback shapes what gets built next.

Contact: hello@lvrpiz.com