Free Link vs ISD Go
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Free Link
This utility tool is designed for users of Wuxi Frsky Electronic Co., Ltd. products. It provides essential functionality for managing and interacting with compatible devices. The application is free to download and use.
- Device management
- Tool software
- Compatible with Wuxi Frsky products
- Free to use
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A tool software applied to Wuxi Frsky Electronic Co., Ltd
ISD Go
Control and manage wireless smart devices with a user-friendly interface. Connect and operate devices via Bluetooth, and receive automatic firmware updates when new versions are available.
- Connect BLE smart devices
- Wireless device operation
- Automatic firmware detection
- Firmware upgrades
- User-friendly interface
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ISD GO is an APP specially used to connect Aster wireless smart devices, so as to provide users with a more convenient and user-friendly user interface to operate Aster's smart devices. We have added the following features in ISD GO: 1. Bind Esther BLE (Bluetooth Low Energy) smart device Users can bind Aster Bluetooth smart devices with their mobile phones, so that they can wirelessly access and operate the devices through their mobile phones. 2. Firmware upgrade When a new device firmware is released on the official website of Esther, ISD GO will automatically detect it, so as to realize the firmware upgrade of the smart device.
Screenshots
Verdict
The clearest difference is rating: ISD Go at 1.8 against Free Link's 1.3. ISD Go also leads on update cadence (weekly vs every 5 weeks) and review sentiment (19% vs 0%). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
ISD Go holds the better App Store score, 1.8 against 1.3. That said, the two scores are not equally well evidenced: ISD Go has 31 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Free Link's written reviews are positive against 19% of ISD Go's.
Free Link ships an update every 5 weeks, ISD Go weekly. The most recent releases landed on September 30, 2026 and October 24, 2026 respectively.
| Parameter | Free Link | ISD Go |
|---|---|---|
| Price | Free | Free |
| Rating | 1.3 (3 ratings) | 1.8 (31 ratings) — better |
| Positive reviews | 0.0% of reviews | 18.5% of reviews — better |
| Number of ratings | 3 | 31 — better |
| Update frequency | Every 5 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 50 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | FrSky Electronic Co ., Ltd. | 深圳艾斯特创新科技有限公司 |
Customer experience
Free Link
ISD Go
Bugs and requests
Free Link
Not enough reviews yet to summarise bugs or requests.
ISD Go
Reported bugs
56 issues- App crashes during updates
- Device not recognized by app
- Abnormal network connection for firmware server
- App not updated for current iOS
- Bluetooth not reconnecting
Show 51 moreShow fewer
- Inaccurate current readings
- Device disconnected during update
- No device detected
- App corrupts N series chargers
- Batteries showing incorrect discharge status
- Unable to bind to FD-200
- Bluetooth will not connect
- Computer doesn't recognize charger
- App fails to download firmware
- Drag brake not engaging
- ESC not staying connected via Bluetooth
- Timeout messages
- CM1620: inaccurate battery/power display, cut-off info
- A8 Air not seen via USB or Bluetooth
- Unstable firmware update connection
- FD200: impossible to discharge below 3.0V, limited current options, preset conflicts
- N16 recognized as N8
- App shows 'Waiting for device'
- Bluetooth drops all the time
- Does not work on iOS 16.5
- Shows wrong device (N8 instead of 16N)
- Firmware version mismatch
- K4 locked on 'UPDATE' screen
- FD-200 disconnects during discharge
- FD-200 keeps discharging regardless of parameters
- App disconnects and won't reconnect
- FD200 Bluetooth disconnects all the time
- CM1620: unstable Bluetooth, incorrect charge level display
- App does not stay connected via Bluetooth
- ESC70: times out, loses connection, resets to factory settings
- FD-200 drops Bluetooth signal
- Bluetooth dropping constantly
- App loses connection to FD200
- H605 Air error code
- New version doesn't work with H605
- App crashes constantly
- App does not remember cut off voltage
- App loses binding to device
- Fails to connect to FD-200
- Difficulty re-establishing BT connection
- K4 won't connect
- Cannot connect to FD-200
- Bluetooth connection problem
- App doesn't find FD-200
- Bluetooth connection with iPad not working
- Cannot connect with iPad or Android
- H605 Air overvolts battery packs
- Incapable of balance charge
- Font size too big on iPhone SE
- Cell voltage not displayed correctly after update
- Manual calibration doesn't work
Requested features
13 requests- Update app for current iOS
- Fix firmware update issues
- Improve Bluetooth connection stability
- Allow discharging to lower voltages (e.g., 0.0V)
- Increase discharge current options
Show 8 moreShow fewer
- Fix preset conflicts
- Improve drag brake settings
- Add dark mode
- Add balance charge option
- Improve font size for smaller screens
- Allow landscape mode on iPad
- Add charge volume in %
- Add alarm for charged battery
In-app purchases
Free Link
No in-app purchases
ISD Go
No in-app purchases
