Good Night System vs Bubble Level + Compass Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Good Night System
This iOS companion app monitors your observatory while you sleep. It will alert you via your iPhone if any issues arise, ensuring peace of mind for astronomers. A free PC application is also available for download.
- Observatory monitoring
- Sleep-time alerts
- iPhone wake-up notifications
- Companion iOS app
- Free PC application available
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The iOS companion for our Good Night System. With this app, your observatory will be monitored while you sleep... at last, and should anything go wrong, your iPhone will wake you up. Before purchasing, please download and try the free app to check everything runs fine. Please visit our web site for details and to download the FREE Windows PC application
Bubble Level + Compass Pro
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.
- 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
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Bubble Level + Compass Pro combines a precise spirit level, compass, and Apple Watch companion app, so when your phone is placed somewhere hard to see its screen, you can still get live readings from your wrist. No more out-of-reach setups, and no more crouching. Features: • Bullseye level plus horizontal and vertical levels with 0.1 degree precision • Bubble level units: Angle (degrees) or Incline/Slope (%) • True and magnetic heading with direction text • Magnetic declination • Apple Watch companion app • Gyro or accelerometer sensor mode • Gyro calibration offset to compensate for camera bulge or uneven phone cases • Pitch/Roll/Yaw rotation rate readouts • Compass calibration status • Red-light night mode The tool is normally included in my astronomical app (Polar Scope Align Pro), but I decided to release it as a separate app because I could not find anything with the features I wanted on the app store. (A free ad-supported version is also available)
Screenshots
Verdict
The clearest difference is review sentiment: Bubble Level + Compass Pro at 100% against Good Night System's 50%. Bubble Level + Compass Pro also leads on rating (5.0 vs 3.7) and ratings volume (22 vs 3). Good Night System's advantage is price (Free vs $0.99) and update cadence (every 6 months vs every 17 months). On ads, in-app purchases and device support 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
Good Night System 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 3.7. That said, the two scores are not equally well evidenced: Bubble Level + Compass Pro has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of Good Night System's written reviews are positive against 100% of Bubble Level + Compass Pro's.
Good Night System ships an update every 6 months, Bubble Level + Compass Pro every 17 months. The most recent releases landed on September 25, 2026 and October 10, 2026 respectively.
| Parameter | Good Night System | Bubble Level + Compass Pro |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.7 (3 ratings) | 5.0 (22 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 22 — better |
| Update frequency | Every 6 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 19 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Lunatico Astronomia S. L. | Dimitrios Kechagias |
Customer experience
Good Night System
Bubble Level + Compass Pro
In-app purchases
Good Night System
No in-app purchases
Bubble Level + Compass Pro
No in-app purchases
Questions
Is Good Night System free?
Is Bubble Level + Compass Pro free?
Which has better reviews, Good Night System or Bubble Level + Compass Pro?
Do Good Night System or Bubble Level + Compass Pro have ads?
Which is updated more often, Good Night System or Bubble Level + Compass Pro?
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