ISD Go vs Duration Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Duration Tracker
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Duration Tracker helps you understand how much time you are truly investing in your work. Simply tap Record to mark the start time, and tap Stop when you finish. The app automatically calculates and displays the duration between the two timestamps, giving you a clear view of how long each session lasts. You can split your work into multiple sessions and track them separately. When needed, select multiple sessions to instantly see the total time spent across all selected activities. With a clean and straightforward interface, Duration Tracker makes it easy to stay aware of your time and focus on what matters most.
Screenshots
Verdict
The clearest difference is device support: ISD Go at 4 against Duration Tracker's 1. ISD Go also leads on iOS requirement (11.0 vs 26.0). On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.
| Parameter | ISD Go | Duration Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (30 ratings) — better | — |
| Positive reviews | 18.5% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 26 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳艾斯特创新科技有限公司 | Myung Geun Choi |
Bugs and 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
Duration Tracker
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ISD Go
No in-app purchases
Duration Tracker
No in-app purchases
