# Level gauge vs Onehand Booknotes

The clearest difference is in-app purchases: Level gauge at none against Onehand Booknotes's 2. Level gauge also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). Onehand Booknotes's advantage is update cadence (weekly vs every 9 months). On price and ads there is nothing between them.

Both are free to download. Onehand Booknotes sells 2 in-app purchases, starting at $3.99 per month. Level gauge asks for nothing beyond the download.

Level gauge ships an update every 9 months, Onehand Booknotes weekly. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Level gauge | Onehand Booknotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/level-gauge/id558393386/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 93.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 16 MB | 5 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuki](https://appshunter.io/developer/558393529) | [Naoto Sato](https://appshunter.io/developer/1758094441) |

## What reviewers say

### Level gauge

[App page](https://appshunter.io/ios/app/level-gauge/id558393386)

This intuitive tool allows you to measure angles and levels in multiple orientations. It offers high precision with smooth movement and includes calibration and hold functions for stable readings. Customize its appearance while enjoying its powerful yet simple design.

**Highlights:** Measure horizontal, vertical, and flat angles, High precision measurements, Smooth and stable readings, Calibration function, Hold function, Customizable appearance

**Features:** Vision Pro support

**In-app purchases:** none


### Onehand Booknotes

[App page](https://appshunter.io/ios/app/onehand-booknotes/id6756857661)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly_Premium | $3.99 | per month |
| Yearly_Premium | $29.99 | per year |


## Frequently asked questions

### Is Level gauge free?

Level gauge is free to download, with no in-app purchases.

### Is Onehand Booknotes free?

Onehand Booknotes is free to download, with in-app purchases available.

### Do Level gauge or Onehand Booknotes have ads?

Both Level gauge and Onehand Booknotes show ads.

### Which is updated more often, Level gauge or Onehand Booknotes?

Level gauge ships an update every 9 months, and Onehand Booknotes weekly. Most recently, Level gauge was updated on September 29, 2026 and Onehand Booknotes on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*