ISD Go vs Week
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.
Week
Easily track the current week number with this utility app. It offers multiple ways to keep the information visible, including customizable home screen widgets, app icon badges, and notification reminders. Supports various calendar systems and date formats for personalized viewing.
- Customizable home screen widget
- App icon badge display
- Notification badge
- Weekly reminder for updates
- Choice of calendar system
- Configurable first day of the week
- Adjustable date format
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Always know the current week number at a glance. Week displays the current week number in a simple calendar and gives you several ways to keep it visible directly from your Home Screen: • Add a customizable widget • Display the week number on the app icon • Show it as a notification badge • Receive a weekly reminder to update the app icon Choose your preferred calendar system, the first day of the week, and the date format displayed in the widget. The app supports ISO 8601 and the Gregorian calendar. Week is simple, lightweight, and designed to give you the information you need without unnecessary features. The standard Apple Terms of Use (EULA) apply: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Week at 100% against ISD Go's 19%. ISD Go's advantage is price (Free vs $0.99) and device support (4 vs 2). On 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
ISD Go is free to download; Week costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ISD Go ships an update weekly, Week every 2 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | ISD Go | Week |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 1.8 (31 ratings) — better | — |
| Positive reviews | 18.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 31 — better | — |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 26 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳艾斯特创新科技有限公司 | Stephane DEFAYE |
Customer experience
ISD Go
Week
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
Week
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ISD Go
No in-app purchases
Week
No in-app purchases
