Bubble Level + Compass Pro vs MeMstar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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)
MeMstar
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MeMstar est un dispositif de pointage pour télescope ne nécessitant aucune transformation matériel. L'application MeMstar permet de vous connecter au boitier MeMstar. Il vous donne un accès à plus de 15 000 objets stellaires comprenant les planètes, le catalogue Messier, NGC et les étoiles nommées.
Screenshots
Verdict
The clearest difference is price: MeMstar at Free against Bubble Level + Compass Pro's $0.99. MeMstar also leads on update cadence (every 9 months vs every 17 months). Bubble Level + Compass Pro's advantage is iOS requirement (12.0 vs 14.0). 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
MeMstar 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 ships an update every 17 months, MeMstar every 9 months. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.
| Parameter | Bubble Level + Compass Pro | MeMstar |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (22 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 22 — better | — |
| Update frequency | Every 17 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 7 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Dimitrios Kechagias | Mickael Pannequin |
In-app purchases
Bubble Level + Compass Pro
No in-app purchases
MeMstar
No in-app purchases
Questions
Is Bubble Level + Compass Pro free?
Is MeMstar free?
Do Bubble Level + Compass Pro or MeMstar have ads?
Which is updated more often, Bubble Level + Compass Pro or MeMstar?
Other comparisons
