# SynScan Pro — Motorized telescope mount

> Motorized telescope mount control for astrophotography and celestial observation. (iPhone/iPad app by Astropower Technology Co. Ltd..)

- Source: https://appshunter.io/ios/app/synscan-pro/id1302270121 (this page in markdown: same URL + `.md`)
- Developer: [Astropower Technology Co. Ltd.](https://appshunter.io/developer/1787940478)
- Category: Utilities
- Price: Free
- Rating: 2.60/5 from 51 App Store ratings · 93 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 46 MB
- Languages: American English
- Released: 2017-10-28
- Data updated: 2026-07-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/synscan-pro/id1302270121/reviews.md

## What is SynScan Pro?

Use the SynScan app to control Sky-Watcher telescope mounts via Wi-Fi or Bluetooth LE. Mounts without built-in Wi-Fi can be supported via a SynScan Wi-Fi adapter.

This is the Pro version of the SynScan app and contains features suited for expert users using equatorial mounts.

Features
- Control telescope mount to slew, align, GOTO and track.
- Point And Track: track celestial objects (including the Sun and planets) without aligning.
- Support gamepad navigation.
- Browse a catalog of stars, comets, and deep sky objects. Or, save your own objects.
- Provide access to mount for use by third-party apps, including ASCOM clients, SkySafari, Luminos, Stellarium Mobile Plus, Stellarium Desktop or customer-developed apps. Also set up mount alignment for Luminos, Skysafari.
- Support access to the mount and the SynScan app from any platform that supports TCP/UDP connections.
- Provide emulator mount for testing and practicing.
- Track fast-moving earth satellites by working with the PreviSat app on Windows PC or the Lumios app on iOS devices.
- Perform polar alignment with or without a polar scope.
- Control shutter release (SNAP) port to trigger an attached camera. (Requires mount with SNAP port and adapter cable that matches camera.)
- Use ASCOM to perform autoguiding on mounts that do not have autoguider (ST-4) port.
- Other mount controls: auto home, PPEC, park.

## Key features

- 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

## Recent user reviews (10 of 93)

All indexed reviews: https://appshunter.io/ios/app/synscan-pro/id1302270121/reviews.md

### 1/5 — Help

*2026-03-02, version 2.5.15*

How do i connect it because I’ve tried many times and its not working. I have the sky watcher 200p

### 1/5 — iOS 26で誤動作

*2025-10-31, version 2.5.15*

EQ5で使っています。
アライメントが上手く行きません。全然明後日の方向に向いたり、赤経軸のモーターが回り続ける不具合が有ります。望遠鏡販売店で確認頂きました。結果アプリの問題になりました。アライメントができないのは、困りものです。

### 1/5 — Functional, but barely

*2025-09-27, version 2.5.15*

Don’t use this for actual stargazing. Use if for alignment only, and get a proper astronomy app, one that can connect to your telescope and drive everything from there.

The alignment process is extraordinarily painful. If you breathe wrong, the button to say “Yes, absolutely, I’ve aligned with the star I selected” doesn’t respond when you touch it. To work around this problem, press the circle i “ⓘ” button to view information about the star, then the “back” button, then the “Yes, absolutely, I’ve aligned with the star I selected” button. Of course, if you’re not careful, you’ll end up pressing “back” one time too many and you’ll have to start the alignment process all over again.

The rest of the app is confusing at best and is all but useless for actual stargazing.

### 5/5 — .

*2025-09-18, version 2.5.15*

Добавьте мкс

### 4/5 — Polar Scope

*2025-08-27, version 2.5.15*

This App needs a Polar Scope Alignment a Wifi connection like Ioptron Use with their App Polar Scope Alignment it would help Skywatcher

### 1/5 — Useless for astrophoto

*2025-02-03, version 2.5.15*

If you close the app or disconnect from the wifi while taking pictures the sequence stops. Can’t connect with SkySafari or Stellarium.

### 3/5 — Why is this app not working properly?

*2025-01-19, version 2.5.2*

I live in the Southern Hemisphere and when I open this app it appears that I’m in the Northern hemisphere. Therefore I’m unable to use my skywatcher telescope at all. Please update app for the iPhone 12. Thank you.

### 2/5 — Needs to be reinstalled every session

*2024-12-27, version 2.5.2*

When it works it works fine, but for some reason if you try to use the app a second time after you finished a first session, it will just not work at all, you go to the star alignment and it will go to a completely wrong area and possible hurt your equipment by trying to make it go below the horizon. I’ve tried the reset alignment button and it just doesn’t do anything

So if you got it to work once but not again, I would try to reinstall the app

Also the design of the app is very weird, you’d imagine ‘polar scope’ (a critical piece of alignment) would be in alignment but it’s in  : Utility, Advanced, Polar Scope ?
And of course the aforementioned issue where it fails to completely reset alignment

### 3/5 — Bon app mais des choses a travailler

*2024-12-26, version 2.5.2*

J’utilise cette app avec mon iPad faute de mieux pour le moment. C’est une bonne app pour utiliser son telescope mais des choses sont à amélioré. Le retournement de merdien ne fonctionne pas par exemple, pas de fonction de binning et une compatibilité limitée avec des apn comme le SonyA7S par exemple. Mais pour débuter sans se prendre la tête et sortir des jolie images ça reste largement potable ! J’aimerai aussi un peu plus de personnalisation des menu pour accéder plus rapidement au chose que j’utilise souvent comme le viseur polaire etc. Mais voila un ensemble mitiger, mais qui fait l’affaire pour débuter. J’ai quand meme hate de trouver un autre système

### 2/5 — iPhone16で接続不安定に

*2024-12-11, version 2.5.2*

iPhone12から16に変更したところ、Wi-Fiで繋がってもアプリ内での接続が上手くいかない事が多くなってます。
一旦アプリを終了・再起動させたり、Wi-Fiの切断・接続を何度か繰り返すと回復する事があるのですが、成功率は高くありません。また
また、スリープからの解除時や少し離れてWi-Fi切断・接続した場合でも起こる事があります。
古いバージョンのAndroid機では起こらないので、iPhone版のみの現象かと思われます。

## Frequently asked questions about SynScan Pro

### What does the SynScan Pro app do?

The SynScan Pro app allows you to control motorized telescope mounts, enabling precise slewing, alignment, GOTO functionality, and tracking of celestial objects. It is designed for expert users, particularly those with equatorial mounts, and offers advanced features for astrophotography and observation.

### What are the key features of SynScan Pro?

Key features include controlling mount movements, a 'Point and Track' function for unaligned object tracking, gamepad navigation, a celestial object catalog, integration with third-party astronomy apps like SkySafari and Stellarium, and the ability to perform polar alignment. It also supports camera shutter release and autoguiding.

### How much does SynScan Pro cost?

Based on the provided information, SynScan Pro is a paid application. There are no mentions of in-app purchases or advertisements, indicating a one-time purchase model for the app itself.

### What devices is SynScan Pro compatible with?

The app is designed to control Sky-Watcher telescope mounts via Wi-Fi or Bluetooth LE. Mounts without built-in Wi-Fi can be supported using a SynScan Wi-Fi adapter. It also integrates with various platforms and third-party apps that support TCP/UDP connections.

### Who is the target audience for SynScan Pro?

This app is intended for amateur astronomers and astrophotographers who use motorized telescope mounts, especially those utilizing equatorial mounts. It caters to users who require advanced control and features for detailed celestial observation and capturing images of the night sky.

## Version history (last 5 releases)

### 2.5.15 — 2025-01-26

• PM Sharing: changed broadcast interval from every 60 sec to every 3 sec. Make more robust.
• Connect popup: fix problem with multiple popup (connect, choose mode, restore from park) not showing in right order
• AZ tracking: not use trail points to track when aux encoder is enabled
• Fix ASCOM server not responding due to receiving zero length UDP packet.
• Tonight's best page: not reset tab or search text when leaving
• Fix crash when going to polar alignment page while disconnected but have EQ mount alignment
• Alignment routine: fix centering UI incorrectly closing when centering failed
• SynScan App protocol server: add support for getting mount axis: 'telescope.Action("AxisCoordinatesGet", "")' -> degree string eg "45.0,15.0". No need to update "SynScan App" ASCOM driver.
• Camera exposure group: ensure to keep screen awake

### 2.5.2 — 2024-08-11

• Auto home: support AZ-EQ mount that has home index.
• Newer mount AZ tracking: make it less likely to fail when using Bluetooth LE

### 2.4.31 — 2024-06-11

• Fix problem introduced in 2.4.27, where connection fails with mounts that don't support setting guide speed.

### 2.4.29 — 2024-05-20

• Updated user manual/ help page
• AutoHome: fix crash when communication error occurred
• PAE: ignore samples that cause conflict (leading to eg AZ tracking hang). When two samples conflict, the more recent one is kept.

### 2.4.27 — 2024-04-24

• Fix problem where after hibernate, data is immediately removed
• Advanced page: guide rate, dual encoder. Fix sync issue.
• Alignment compensation: fix data not saved if using default alignment but with non-default NP/CH
• Speed adjustment resolution ppm: update

## Apps similar to SynScan Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [StellarMate](https://appshunter.io/ios/app/stellarmate/id1252626058) | 3.3 (20) | Free | Utilities |
| [Polar Scope Align Pro Watch](https://appshunter.io/ios/app/polar-scope-align-pro-watch/id986082042) | 4.9 (48) | $4.99 | Utilities |
| [iOptron Commander (iOS)](https://appshunter.io/ios/app/ioptron-commander-ios/id1626958667) | 2.0 (10) | Free | Utilities |
| [SynScan Photo](https://appshunter.io/ios/app/synscan-photo/id1475652739) | 2.0 (2) | Free | Utilities |
| [Polar Scope Align Pro](https://appshunter.io/ios/app/polar-scope-align-pro/id970161373) | 4.9 (290) | $3.99 | Utilities |
| [Polar Scope Align](https://appshunter.io/ios/app/polar-scope-align/id970157965) | 4.7 (164) | Free | Utilities |

## More apps by Astropower Technology Co. Ltd.

- [Star Adventurer Console](https://appshunter.io/ios/app/star-adventurer-console/id1080398995)
- [Skymemo App](https://appshunter.io/ios/app/skymemo-app/id1160534455)
- [SynScan](https://appshunter.io/ios/app/synscan/id1243086631)
- [Tracker Console](https://appshunter.io/ios/app/tracker-console/id1458656064)

All apps by Astropower Technology Co. Ltd.: https://appshunter.io/developer/1787940478

## Related topics

[sky watcher](https://appshunter.io/ios/topics/sky-watcher) · [apogee connect](https://appshunter.io/ios/topics/apogee-connect)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*