# GPF Bubble Level — Bubble Level

> Bubble Level (iPhone/iPad app by Gian Paolo Fontani.)

- Source: https://appshunter.io/ios/app/gpf-bubble-level/id6759933601 (this page in markdown: same URL + `.md`)
- Developer: [Gian Paolo Fontani](https://appshunter.io/developer/1866631629)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 18.6 · 0 MB
- Languages: American English
- Released: 2026-03-03
- Data updated: 2026-05-14
- User reviews in markdown: https://appshunter.io/ios/app/gpf-bubble-level/id6759933601/reviews.md

## What is GPF Bubble Level?

GPF Bubble Level is a minimal, high-contrast spirit level app for iPhone, built around real-time accelerometer data.

It uses Core Motion to read device gravity and translates movement into a smooth on-screen bubble inside a circular level grid. The interface is intentionally clean: black background, white elements, Menlo typography, and a compact layout designed for quick visual alignment in everyday use.

Key features:
- Real-time level detection using accelerometer/device motion
- Smooth bubble movement with light filtering for stability
- Tilt angle readout in degrees
- Live X/Y gravity values for reference
- Dedicated Info screen with app icon, title, and version/build footer
- Custom monochrome app icon (white on black) consistent with the app style

Design goals:
- Fast glanceability
- No clutter
- Strong visual contrast for indoor/outdoor visibility
- Coherent monochrome identity across UI and iconography

Technical notes:
- SwiftUI-based UI
- CoreMotion integration via observable motion manager
- Motion privacy usage description configured
- Build/version shown directly from bundle metadata

This app is ideal for quick leveling checks on surfaces, shelves, frames, and small DIY tasks, with a focused UX that prioritizes readability and responsiveness.


## Version history (last 1 release)

### 1.0 — 2026-03-04

No release notes.

## More apps by Gian Paolo Fontani

- [Gian Paolo Fontani](https://appshunter.io/ios/app/gian-paolo-fontani/id6757398535)
- [GPF Weather System](https://appshunter.io/ios/app/gpf-weather-system/id6758885087)
- [GPF Network Console](https://appshunter.io/ios/app/gpf-network-console/id6759045565)
- [GPF Health Log](https://appshunter.io/ios/app/gpf-health-log/id6759050084)
- [GPF Registro Presenze](https://appshunter.io/ios/app/gpf-registro-presenze/id6759259886)
- [GPF Stop Smoking](https://appshunter.io/ios/app/gpf-stop-smoking/id6759336988)

All apps by Gian Paolo Fontani: https://appshunter.io/developer/1866631629

## Related topics

[gpf bubble level](https://appshunter.io/ios/topics/gpf-bubble-level)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-14.*