INDIGO A1 vs SynLink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
INDIGO A1
This versatile graphical interface allows for multiplatform control of INDIGO servers, enhancing astronomical software management. It offers comprehensive features for image capture, guiding, mount operation, and plate solving, with advanced scripting and real-time monitoring.
- Multiplatform INDIGO server control
- Image capture and stacking
- Advanced guiding functionalities
- Telescope mount and accessory control
- Plate solving for precise targeting
- Scripting and automation
- Macro photography mode
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INDIGO A1 brings your astrophotography equipment together in one native app for Mac, iPad and iPhone. From finding and framing a target to focusing, guiding and capturing a sequence, keep your imaging session under control from a single workspace. Use the built-in INDIGO server on your Mac to control connected equipment, or connect to an external INDIGO server such as INDIGO Sky on a Raspberry Pi or an observatory computer. On iPad and iPhone, connect to your server to control equipment, inspect images and follow your session. CAPTURE AND FOCUS Control compatible astronomy cameras, focusers and filter wheels. Set up exposure batches, run autofocus and inspect image previews with stretching, debayering, histograms and star measurements. Use FWHM, HFD and Peak maps to evaluate image quality across the frame. GUIDE AND DITHER Calibrate and run autoguiding, monitor tracking with live graphs and coordinate dithering with image capture. FIND AND FRAME YOUR TARGET Explore the sky map and search built-in catalogues, SIMBAD and JPL HORIZONS. Control slewing, tracking and parking. With a compatible plate solver, use image solving, precise GoTo, star alignment and polar alignment to get your setup ready for imaging. AUTOMATE YOUR SESSION Build imaging sequences on Mac and iPad, then run and monitor them from your connected device. Coordinate focusing, guiding, capture and mount operations, with conditions based on time, solar altitude and target altitude. For advanced workflows, edit JavaScript scripts on Mac. MAKE THE WORKSPACE YOURS Create custom dashboards with equipment controls, image previews and status graphs. Save equipment configurations and restore them for your next session. Access raw device properties whenever you need detailed control or troubleshooting. CONTROL YOUR ACCESSORIES Manage compatible power boxes, dew controllers, flat panels, dust covers and weather sensors alongside your imaging equipment. Supported setups can also include domes and field rotators. WORKS WITH INDIGO SKY Connect INDIGO A1 to INDIGO Sky running on a Raspberry Pi attached to your telescope. Control your cameras, mount, focuser, filter wheel and accessories over the network, inspect incoming images and monitor imaging sequences from your Mac, iPad or iPhone. INDIGO agents run on the server, so an imaging sequence can continue even if the app disconnects; reconnect later to check progress and retrieve images. On Mac, you can also use the built-in INDIGO server to control equipment connected directly to your computer. TRY THE COMPLETE WORKFLOW Try all features free for 14 days. Permanently unlock Imager, Guider, Mount and Dashboard features individually through in-app purchases. INDIGO A1 requires compatible astronomical equipment and drivers. Available controls depend on your hardware and INDIGO server. Plate solving requires a compatible solver and the appropriate index files. Requires iOS/iPadOS 17 or later.
SynLink
This professional controller facilitates astrophotography by offering broad compatibility with major camera brands and astronomical equipment. Its design emphasizes simplicity, restraint, and modernity for an intuitive user experience.
- Broad camera compatibility (Fujifilm, Canon, Nikon, Sony)
- Supports astronomical cameras
- Controls equatorial mounts
- Manages filter wheels and focusers
- Modern and simple interface
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It offers seamless compatibility with most mainstream cameras, including Fujifilm, Canon, Nikon, and Sony, as well as the majority of astronomical cameras, equatorial mounts, filter wheels, focusers, rotators, and flat panel devices on the market. SynLink is being developed by following the design philosophy of simplicity, restraint, and modernity.
Screenshots
Verdict
The clearest difference is rating: SynLink at 4.3 against INDIGO A1's 3.4. SynLink also leads on in-app purchases (none vs 9) and iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and ads 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
Both are free to download. INDIGO A1 sells 9 one-off in-app purchases. SynLink asks for nothing beyond the download.
SynLink holds the better App Store score, 4.3 against 3.4. Both are backed by a comparable volume of ratings — 5 and 3 respectively.
INDIGO A1 ships an update every 2 weeks, SynLink fortnightly. Both last shipped on October 30, 2026.
| Parameter | INDIGO A1 | SynLink |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (5 ratings) | 4.3 (3 ratings) — better |
| Positive reviews | 58.3% of reviews | — |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 221 MB |
| Age rating | 4+ | 4+ |
| Developer | CloudMakers, s. r. o. | Suzhou UMa Technology Co., Ltd |
Customer experience
INDIGO A1
SynLink
In-app purchases
INDIGO A1
- Dashboard features upgradeFree
- All features 14-day trialFree
- Imager features upgradeFree
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- Guider features upgradeFree
- Mount control features upgradeFree
- Dashboard features$19.99
- Guiding features$24.99
- Imaging features$24.99
- Mount control features$24.99
SynLink
No in-app purchases








