# LevelMaster: Bubble Level — Bubble Level & Angle Meter

> Bubble Level & Angle Meter (iPhone/iPad app by Yuki Okawa.)

- Source: https://appshunter.io/ios/app/levelmaster-bubble-level/id6786262885 (this page in markdown: same URL + `.md`)
- Developer: [Yuki Okawa](https://appshunter.io/developer/1867195492)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 24 MB
- Languages: American English
- Released: 2026-07-07
- Data updated: 2026-07-24
- User reviews in markdown: https://appshunter.io/ios/app/levelmaster-bubble-level/id6786262885/reviews.md

## What is LevelMaster?

LevelMaster turns your phone into a precision spirit level and angle meter, using the built-in motion sensor — no extra hardware needed.

BUBBLE LEVEL
• Circular bubble level for flat surfaces — lay the phone on a table, shelf or countertop
• Bar bubble level for vertical surfaces — hold it against a wall, door frame or picture
• Automatically switches between flat and vertical modes as you move the device

ANGLE METER
• Large protractor-style gauge with a live degree readout
• "Set as 0°" lets you zero out any starting angle — handy for measuring a slope or a change in angle (e.g. a ramp or a roof)

LEVEL ALERT
• A confirming beep and a light vibration the instant the device becomes level
• Turn the beep or vibration off independently in Settings

CAMERA OVERLAY
• See a level line through the camera while you hang a shelf, a frame or a piece of art
• The line turns green the moment it's level

CALIBRATION
• Correct small sensor offsets against a known-level reference, per device

MADE FOR EVERYONE
• Light & dark themes with multiple accent colors
• English and Japanese
• Keep the screen on while measuring

PRIVACY FIRST
• Works fully offline. The camera is used only to overlay the level line — nothing is ever captured, saved, or sent anywhere. No account, no cloud, no tracking.

Great for DIY projects, hanging furniture after a move, and checking a boat or dock is level while fishing.

Note: readings are approximate and depend on your device's sensor. LevelMaster is intended for everyday DIY use, not for professional or regulatory measurements.

Free, supported by ads.


## Version history (last 2 releases)

### 1.0.1 — 2026-07-19

Fixed minor bugs.

### 1.0 — 2026-07-07

No release notes.

## More apps by Yuki Okawa

- [Bulk QR: QR Code Maker](https://appshunter.io/ios/app/bulk-qr-qr-code-maker/id6757633166)
- [Gratie - Gratitude Journal](https://appshunter.io/ios/app/gratie-gratitude-journal/id6784641065)
- [Leafy - Plant Care Reminder](https://appshunter.io/ios/app/leafy-plant-care-reminder/id6784672249)
- [Lull: Focus & Sleep Sounds](https://appshunter.io/ios/app/lull-focus-and-sleep-sounds/id6784733202)
- [Trailpack: Camp Checklist](https://appshunter.io/ios/app/trailpack-camp-checklist/id6784964041)
- [Sudoku Zen: Number Logic](https://appshunter.io/ios/app/sudoku-zen-number-logic/id6785088442)

All apps by Yuki Okawa: https://appshunter.io/developer/1867195492

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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 2026-07-24.*