# Bubble Level + Compass Pro vs StellarMate

The clearest difference is review sentiment: Bubble Level + Compass Pro at 100% against StellarMate's 35%. Bubble Level + Compass Pro also leads on rating (5.0 vs 3.3) and iOS requirement (12.0 vs 15.1). StellarMate's advantage is price (Free vs $0.99) and update cadence (every 8 days vs every 17 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

StellarMate is free to download; Bubble Level + Compass Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bubble Level + Compass Pro holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 22 and 20 respectively. Written reviews point the same way: 100% of Bubble Level + Compass Pro's written reviews are positive against 35% of StellarMate's.

Bubble Level + Compass Pro ships an update every 17 months, StellarMate every 8 days. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Bubble Level + Compass Pro | StellarMate |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (22 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222/reviews)** | [3.3 (20 ratings)](https://appshunter.io/ios/app/stellarmate/id1252626058/reviews) |
| Number of ratings | **22** | 20 |
| Positive reviews | **100.0% of reviews** | 34.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 119 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [Ikarus Astronomy Company For Scientific Instruments & Tools](https://appshunter.io/developer/1252626057) |

## What reviewers say

### Bubble Level + Compass Pro

[App page](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222)

This utility app provides a precise spirit level and compass for your iPhone and Apple Watch. Get live readings on your wrist, even when your phone's screen is out of sight. Features include bullseye, horizontal, and vertical levels with 0.1-degree precision.

**Highlights:** Bullseye, horizontal, and vertical levels, 0.1-degree precision, True and magnetic heading, Apple Watch companion app, Gyro or accelerometer sensor mode, Red-light night mode

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### StellarMate

[App page](https://appshunter.io/ios/app/stellarmate/id1252626058)

Control your astrophotography equipment remotely. Capture images, stream video, and perform precise alignment. Automatically back up your photos to the cloud with rich metadata for easy searching.

**Highlights:** Remote equipment control, Image capture and video streaming, Polar alignment assistant, Cloud image backup, Metadata search and sorting, Software updates

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level + Compass Pro free?

Bubble Level + Compass Pro costs $0.99, with no in-app purchases.

### Is StellarMate free?

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

### Which has better reviews, Bubble Level + Compass Pro or StellarMate?

Bubble Level + Compass Pro is rated higher. Bubble Level + Compass Pro averages 5.0 out of 5 from 22 ratings, while StellarMate averages 3.3 from 20 ratings.

### Do Bubble Level + Compass Pro or StellarMate have ads?

Neither Bubble Level + Compass Pro nor StellarMate shows ads.

### Which is updated more often, Bubble Level + Compass Pro or StellarMate?

Bubble Level + Compass Pro ships an update every 17 months, and StellarMate every 8 days. Most recently, Bubble Level + Compass Pro was updated on September 10, 2026 and StellarMate on September 21, 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.*