# Libella -水平器・勾配計- — 寸勾配・目標角・音声ガイド

> 寸勾配・目標角・音声ガイド (iPhone/iPad app by Yuya Kato.)

- Source: https://appshunter.io/ios/app/libella/id6826148030 (this page in markdown: same URL + `.md`)
- Developer: [Yuya Kato](https://appshunter.io/developer/6816311417)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Japanese
- Released: 2026-10-30
- Data updated: 2026-11-06

## What is Libella?

Libella is a spirit level and inclinometer that pairs a smoothly moving bubble with clear readouts and an error estimate.Its screen stays minimal and calm, while the tools you need for photography, installation, and DIY are right at hand.

- THE BASIC LEVEL (FREE)
• Lay it flat for a round bubble level; stand it on an edge for a tube level. It switches automatically
• The bubble moves like liquid, overshooting slightly before it settles
• Straight ±90° scales show left/right and front/back tilt, so you can read the angle even when the bubble is pinned
• An estimated error, based on how much the value is fluctuating, tells you when the reading is stable
• ZERO sets the current position as your reference; HOLD freezes the value
• Tap the large number for a big readout you can read from across the room
• Degrees, %, mm/m, and radians
• The whole screen rotates to match how you hold the phone

- LIBELLA PRO (7-DAY FREE TRIAL, ONE-TIME PURCHASE)
• Voice guidance tells you which side to raise: "Raise the left side a little", "Level"
• Sound and haptic guidance that speeds up as you get closer to level
• Auto-hold: the value is held once the phone is still. Place it somewhere high, take it down, then read it
• Per-placement calibration: use a reference level or a 180° flip test to remove errors caused by cases and camera bumps. Face-down calibration records automatically when you place the phone
• Target angle: treat a roof pitch or ramp angle as "level". Set it by turning the dial on the tube; it snaps to common angles
• Japanese sun pitch and 1/n ratio
• Rotation lock: measure steep angles up to ±180° without switching modes

- GREAT FOR
• Leveling cameras, tripods, shooting tables, and light stands
• Installing shelves, furniture, appliances, and picture frames
• Setting up gallery and store displays
• Turntables, aquariums, 3D printer beds, and leveling a camper

- PRICING
• No ads
• The basic level is free forever
• Try Pro free for 7 days. You are never charged automatically when the trial ends
• Pro is a one-time purchase that works on every device signed in with the same Apple ID

- ABOUT ACCURACY
Libella measures tilt with the iPhone's accelerometer. Calibration reduces error, but some error may remain depending on the model, placement, and case. For work that demands high precision, such as construction or inspection, use a dedicated level or measuring instrument.
Use "Verify Accuracy" in the app to compare Libella against your own reference level.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Libella Pro | $2.99 | one-time |
| 7日間無料トライアル | Free | one-time |


## Is Libella safe?

Not enough ratings yet to assess Libella.

## Is Libella legit?

Libella -水平器・勾配計- appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Libella is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-11-03

• Updated the App Store description and screenshots. No changes to the app itself.

Tip: Tap the large number for a big readout you can read from across the room.

### 1.0 — 2026-10-30

No release notes.

## More apps by Yuya Kato

- [My Little Invader](https://appshunter.io/ios/app/my-little-invader/id6816311415)
- [My Fair Jelly](https://appshunter.io/ios/app/my-fair-jelly/id6819178234)
- [Bota-Log](https://appshunter.io/ios/app/bota-log/id6821462601)

All apps by Yuya Kato: https://appshunter.io/developer/6816311417

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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 2026-11-06.*