# Astro Kit vs Bubble Level + Compass

The clearest difference is review sentiment: Bubble Level + Compass at 90% against Astro Kit's 50%. Bubble Level + Compass also leads on rating (5.0 vs 4.6) and iOS requirement (12.0 vs 17.6). Astro Kit'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 4.6. Both are backed by a comparable volume of ratings — 50 and 34 respectively. Written reviews point the same way: 50% of Astro Kit's written reviews are positive against 90% of Bubble Level + Compass's.

Astro Kit ships an update every 3 months, Bubble Level + Compass every 4 months. The most recent releases landed on June 1, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Astro Kit | Bubble Level + Compass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (50 ratings)](https://appshunter.io/ios/app/astro-kit/id432175465/reviews) | **[5.0 (34 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass/id1374372463/reviews)** |
| Number of ratings | **50** | 34 |
| Positive reviews | 50.0% of reviews | **90.5% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 18 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jerome Diaz](https://appshunter.io/developer/334987620) | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) |

## What reviewers say

### Astro Kit

[App page](https://appshunter.io/ios/app/astro-kit/id432175465)

This utility app assists in telescope setup by providing essential information like GPS coordinates and universal time. It also includes a compass and calculates the local hour angle for Polaris. Designed for amateur astronomers, it simplifies the alignment process.

**Highlights:** GPS coordinates, Compass functionality, Universal time display, Polaris local hour angle computation, Telescope alignment assistance

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Astro Kit free?

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

### Is Bubble Level + Compass free?

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

### Which has better reviews, Astro Kit or Bubble Level + Compass?

Bubble Level + Compass is rated higher. Astro Kit averages 4.6 out of 5 from 50 ratings, while Bubble Level + Compass averages 5.0 from 34 ratings.

### Do Astro Kit or Bubble Level + Compass have ads?

Bubble Level + Compass shows ads; Astro Kit does not.

### Which is updated more often, Astro Kit or Bubble Level + Compass?

Astro Kit ships an update every 3 months, and Bubble Level + Compass every 4 months. Most recently, Astro Kit was updated on June 1, 2026 and Bubble Level + Compass on September 7, 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.*