# Bubble Level + Compass Pro vs SynScan Pro

The clearest difference is review sentiment: Bubble Level + Compass Pro at 100% against SynScan Pro's 22%. Bubble Level + Compass Pro also leads on rating (5.0 vs 2.6) and iOS requirement (12.0 vs 14.0). SynScan Pro's advantage is price (Free vs $0.99) and update cadence (every 2 months vs every 17 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

SynScan Pro 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 2.6. Both are backed by a comparable volume of ratings — 22 and 51 respectively. Written reviews point the same way: 100% of Bubble Level + Compass Pro's written reviews are positive against 22% of SynScan Pro's.

Bubble Level + Compass Pro ships an update every 17 months, SynScan Pro every 2 months. The most recent releases landed on September 10, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Bubble Level + Compass Pro | SynScan Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (22 ratings)](https://appshunter.io/ios/app/bubble-level-plus-compass-pro/id988590222/reviews)** | [2.6 (51 ratings)](https://appshunter.io/ios/app/synscan-pro/id1302270121/reviews) |
| Number of ratings | 22 | **51** |
| Positive reviews | **100.0% of reviews** | 21.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 7 MB | 46 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dimitrios Kechagias](https://appshunter.io/developer/970157964) | [Astropower Technology Co. Ltd.](https://appshunter.io/developer/1787940478) |

## 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


### SynScan Pro

[App page](https://appshunter.io/ios/app/synscan-pro/id1302270121)

Control motorized telescope mounts for celestial observation and astrophotography. Features include precise slewing, alignment, GOTO, and tracking of stars, planets, and deep-sky objects. Supports advanced functions like polar alignment and camera triggering.

**Highlights:** Control telescope mount (slew, align, GOTO, track), Point and Track celestial objects, Gamepad navigation support, Catalog of celestial objects, Third-party app integration (ASCOM, SkySafari), Polar alignment (with or without polar scope), Camera shutter release control

**Features:** macOS Compatibility

**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 SynScan Pro free?

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

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

Bubble Level + Compass Pro is rated higher. Bubble Level + Compass Pro averages 5.0 out of 5 from 22 ratings, while SynScan Pro averages 2.6 from 51 ratings.

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

Neither Bubble Level + Compass Pro nor SynScan Pro shows ads.

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

Bubble Level + Compass Pro ships an update every 17 months, and SynScan Pro every 2 months. Most recently, Bubble Level + Compass Pro was updated on September 10, 2026 and SynScan Pro on July 4, 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.*