# Clinometer Bubble Level vs Opti Clinometer

The clearest difference is update cadence: Opti Clinometer at every 2 days against Clinometer Bubble Level's every 49 months. Clinometer Bubble Level's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Clinometer Bubble Level ships an update every 49 months, Opti Clinometer every 2 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Clinometer Bubble Level | Opti Clinometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (58 ratings)](https://appshunter.io/ios/app/clinometer-bubble-level/id1151262593/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 24 MB | 2 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [齐 陈](https://appshunter.io/developer/455625305) | [Burak Kizilobek](https://appshunter.io/developer/6788531231) |

## What reviewers say

### Clinometer Bubble Level

[App page](https://appshunter.io/ios/app/clinometer-bubble-level/id1151262593)

Measure angles and surface flatness with this easy-to-use tool. Ideal for home decoration, aligning pictures, and calculating slopes or pitches. Features calibration and a hold option for convenience.

**Highlights:** Angle measurement, Surface flatness measurement, Calibration, Hold option, Auto fade unused level, Number indicators for angles

**Features:** macOS Compatibility

**In-app purchases:** none


### Opti Clinometer

[App page](https://appshunter.io/ios/app/opti-clinometer/id6788531229)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Clinometer Bubble Level free?

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

### Is Opti Clinometer free?

Opti Clinometer is free to download, with no in-app purchases.

### Do Clinometer Bubble Level or Opti Clinometer have ads?

Neither Clinometer Bubble Level nor Opti Clinometer shows ads.

### Which is updated more often, Clinometer Bubble Level or Opti Clinometer?

Clinometer Bubble Level ships an update every 49 months, and Opti Clinometer every 2 days. Most recently, Clinometer Bubble Level was updated on October 24, 2026 and Opti Clinometer on October 19, 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.*