Astro Kit vs Bubble Level + Compass
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Astro Kit
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.
- GPS coordinates
- Compass functionality
- Universal time display
- Polaris local hour angle computation
- Telescope alignment assistance
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Astro Kit is intended to provide useful informations while setting up a telescope. - gps coordinates - compass - universal time - compute polaris local hour angle
Bubble Level + Compass
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.
- Horizontal and vertical level measurements
- Surface angle readings
- True north compass
- Advanced calibration
- Magnetic declination reading
- Accelerometer/Gyro switch
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Bubble Level + Compass combines a bubble level and a compass, with advanced controls for users who want more than the basics. Use it to check horizontal/vertical/surface angles, or get compass direction relative to either true or magnetic north. For users who work with physical compasses, magnetic declination is also provided to convert magnetic readings to true north readings. The level includes gyroscope calibration, which is especially useful on phones with a raised camera bump or an uneven back/case. No nagging popups or interruptions. The free version only includes a small banner ad at the bottom. Features • Bullseye level plus horizontal and vertical levels with 0.1 degree precision. • Compass with true north and magnetic north. • Magnetic declination display for converting magnetic readings to true north readings. • Gyroscope calibration for phones that do not rest perfectly flat. • Gyro or accelerometer sensor mode. • Clean interface with no popup interruptions. If you enjoy the app, leaving a review would help. An ad-free Pro version is also available, with more features including Apple Watch support, night mode, slope/inclination %, and pitch, yaw, and roll rotation rate.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Astro Kit | Bubble Level + Compass |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (50 ratings) | 5.0 (34 ratings) — better |
| Positive reviews | 50.0% of reviews | 90.5% of reviews — better |
| Number of ratings | 50 — better | 34 |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Jerome Diaz | Dimitrios Kechagias |
Customer experience
Astro Kit
Bubble Level + Compass
In-app purchases
Astro Kit
No in-app purchases
Bubble Level + Compass
No in-app purchases
Questions
Is Astro Kit free?
Is Bubble Level + Compass free?
Which has better reviews, Astro Kit or Bubble Level + Compass?
Do Astro Kit or Bubble Level + Compass have ads?
Which is updated more often, Astro Kit or Bubble Level + Compass?
Other comparisons
