# SynScan vs Proppo

The clearest difference is update cadence: Proppo at every 3 weeks against SynScan's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SynScan ships an update every 2 months, Proppo every 3 weeks. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | SynScan | Proppo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/synscan/id1243086631/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 46 MB | 47 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Astropower Technology Co. Ltd.](https://appshunter.io/developer/1787940478) | [Swippy Tech](https://appshunter.io/developer/1826324696) |

## What reviewers say

### SynScan

[App page](https://appshunter.io/ios/app/synscan/id1243086631)

Control motorized telescope mounts for celestial object tracking and exploration. Features include GOTO functionality, object catalogs, and gamepad navigation. Ideal for novice users with alt-azimuth mounts.

**Highlights:** Control telescope mount slew, align, GOTO, and track, Point and Track celestial objects, Support gamepad navigation, Browse and save celestial object catalogs, Third-party app integration (ASCOM, SkySafari, Stellarium), Emulator mount for testing

**Features:** macOS Compatibility

**In-app purchases:** none


### Proppo

[App page](https://appshunter.io/ios/app/proppo/id6754452967)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SynScan free?

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

### Is Proppo free?

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

### Do SynScan or Proppo have ads?

Neither SynScan nor Proppo shows ads.

### Which is updated more often, SynScan or Proppo?

SynScan ships an update every 2 months, and Proppo every 3 weeks. Most recently, SynScan was updated on June 1, 2026 and Proppo on September 9, 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.*