# Bubble Level + Compass vs iOptron Commander (iOS)

The clearest difference is review sentiment: Bubble Level + Compass at 90% against iOptron Commander (iOS)'s 6%. Bubble Level + Compass also leads on rating (5.0 vs 1.9) and iOS requirement (12.0 vs 18.6). iOptron Commander (iOS)'s advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence 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.

Bubble Level + Compass holds the better App Store score, 5.0 against 1.9. Both are backed by a comparable volume of ratings — 34 and 14 respectively. Written reviews point the same way: 90% of Bubble Level + Compass's written reviews are positive against 6% of iOptron Commander (iOS)'s.

Bubble Level + Compass ships an update every 4 months, iOptron Commander (iOS) every 6 months. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Bubble Level + Compass | iOptron Commander (iOS) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (34 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass/id1374372463/reviews)** | [1.9 (14 ratings)](https://appshunter.io/ios/app/ioptron-commander-ios/id1626958667/reviews) |
| Number of ratings | **34** | 14 |
| Positive reviews | **90.5% of reviews** | 6.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 24 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [成城 徐](https://appshunter.io/developer/564078964) |

## What reviewers say

### Bubble Level + Compass

[App page](https://appshunter.io/ios/app/bubble-level-plus-compass/id1374372463)

This utility app provides a precise bubble level for horizontal, vertical, and surface angle measurements, along with a true-north compass. It offers advanced calibration options and works on iOS devices. A Pro version is available for additional features.

**Highlights:** Horizontal and vertical level measurements, Surface angle readings, True north compass, Advanced calibration, Magnetic declination reading, Accelerometer/Gyro switch

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### iOptron Commander (iOS)

[App page](https://appshunter.io/ios/app/ioptron-commander-ios/id1626958667)

Control your iOptron telescope mount remotely using your iOS device. This utility allows for basic functions like slewing to celestial objects, syncing time and location, and managing compatible mount series.

**Highlights:** Remote telescope mount control, Slew to stars and deepsky objects, Sync time and site from iOS, Supports HEM, HAE, HAZ, CEM, GEM series mounts, Basic control functions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level + Compass free?

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

### Is iOptron Commander (iOS) free?

iOptron Commander (iOS) is free to download, with no in-app purchases.

### Which has better reviews, Bubble Level + Compass or iOptron Commander (iOS)?

Bubble Level + Compass is rated higher. Bubble Level + Compass averages 5.0 out of 5 from 34 ratings, while iOptron Commander (iOS) averages 1.9 from 14 ratings.

### Do Bubble Level + Compass or iOptron Commander (iOS) have ads?

Bubble Level + Compass shows ads; iOptron Commander (iOS) does not.

### Which is updated more often, Bubble Level + Compass or iOptron Commander (iOS)?

Bubble Level + Compass ships an update every 4 months, and iOptron Commander (iOS) every 6 months. Most recently, Bubble Level + Compass was updated on October 5, 2026 and iOptron Commander (iOS) on October 2, 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.*