Comparison

SynScan vs Touch

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SynScan

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
Read full description

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 version of the SynScan app is suited for novice users using alt-azimuth 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.

About

Touch

Control your astrophotography sessions remotely from your mobile device or Mac. Manage imaging, focus, guiding, and polar alignment. This open-source tool enhances your workflow without ads or in-app purchases.

Highlights
  • Remote imaging session launch
  • Focus control
  • Guiding performance monitoring
  • Three Point Polar Alignment
  • Connected device control
  • Open source
Features
Read full description

Touch-N-Stars brings the core features of the popular astrophotography software N.I.N.A. right to your phone, tablet, or Apple Silicon Mac. Start imaging sessions, adjust focus, monitor guiding, or perform a Three Point Polar Alignment – all from the palm of your hand. Key Features: - Launch imaging sessions and control focus remotely - Monitor guiding performance in real time - Perform Three Point Polar Alignment (requires N.I.N.A. v2.2.2.0+) - Control all connected devices such as the dome or flat panel - 100% open source. No ads. No in-app purchases. Requirements: - A running N.I.N.A. instance on your imaging PC - Advanced API Plugin enabled (Port 1888, API v2) - Touch'N'Stars Plugin Touch-N-Stars is a companion tool – not a full replacement for the desktop experience. Enhance your astrophotography workflow and stay flexible – wherever you are.

Screenshots

SynScan3 screens
Touch4 screens

Verdict

The call

The clearest difference is review sentiment: Touch at 75% against SynScan's 22%. Touch also leads on rating (4.7 vs 3.3) and update cadence (fortnightly vs every 2 months). SynScan's advantage is iOS requirement (14.0 vs 16.6). On price, ratings volume, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Touch holds the better App Store score, 4.7 against 3.3. Both are backed by a comparable volume of ratings — 8 and 7 respectively. Written reviews point the same way: 22% of SynScan's written reviews are positive against 75% of Touch's.

UpkeepUpdate frequency

SynScan ships an update every 2 months, Touch fortnightly. The most recent releases landed on September 16, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
SynScan versus Touch: the parameters behind the verdict, then further details
ParameterSynScanTouch
PriceFreeFree
Rating3.3 (8 ratings)4.7 (7 ratings) — better
Positive reviews22.2% of reviews75.0% of reviews — better
Number of ratings8 — better7
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.6
Further details — not scored
Size46 MB41 MB
Age rating4+4+
DeveloperAstropower Technology Co. Ltd.Johannes Maier

Customer experience

SynScan

All ratings8 ratings
Positive37.5%
Neutral37.5%
Negative25.0%
Written reviews18 reviews
Positive22.2%
Neutral16.7%
Negative61.1%

Touch

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

In-app purchases

None

SynScan

No in-app purchases

None

Touch

No in-app purchases

Questions

Is SynScan free?
SynScan is free to download, with no in-app purchases.
Is Touch free?
Touch is free to download, with no in-app purchases.
Which has better reviews, SynScan or Touch?
Touch is rated higher. SynScan averages 3.3 out of 5 from 8 ratings, while Touch averages 4.7 from 7 ratings.
Do SynScan or Touch have ads?
Neither SynScan nor Touch shows ads.
Which is updated more often, SynScan or Touch?
SynScan ships an update every 2 months, and Touch fortnightly. Most recently, SynScan was updated on September 16, 2026 and Touch on October 13, 2026.

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