# ISD Go vs TATTU

The clearest difference is rating: ISD Go at 1.8 against TATTU's 1.0. ISD Go also leads on update cadence (weekly vs every 2 months) and ratings volume (31 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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 1.0. That said, the two scores are not equally well evidenced: ISD Go has 31 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 19% of ISD Go's written reviews are positive against 0% of TATTU's.

ISD Go ships an update weekly, TATTU every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | ISD Go | TATTU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (31 ratings)](https://appshunter.io/ios/app/isd-go/id1447072980/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/tattu/id6476337515/reviews) |
| Number of ratings | **31** | 1 |
| Positive reviews | **18.5% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free | Free |
| Size | 26 MB | 4 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳艾斯特创新科技有限公司](https://appshunter.io/developer/1405370693) | [Shenzhen Grepow Battery Co.Ltd.](https://appshunter.io/developer/1714028930) |

## What reviewers say

### ISD Go

[App page](https://appshunter.io/ios/app/isd-go/id1447072980)

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.

**Highlights:** Connect BLE smart devices, Wireless device operation, Automatic firmware detection, Firmware upgrades, User-friendly interface

**In-app purchases:** none

**What reviewers like**

- 👍 Easy firmware updates (sometimes)
- 👍 Practical app interface
- 👍 Works for some users
- 👍 Good hardware functionality (without app)

**What reviewers complain about**

- 🐛 Frequent connection drops (Bluetooth)
- 🐛 Firmware update failures
- 🐛 Device not detected
- 🐛 App crashes
- 🐛 Inaccurate readings/settings

**Reported bugs**

- App crashes during updates
- Device not recognized by app
- Abnormal network connection for firmware server
- App not updated for current iOS
- Bluetooth not reconnecting

**Requested features**

- 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


### TATTU

[App page](https://appshunter.io/ios/app/tattu/id6476337515)

This utility app provides battery management system (BMS) functions for smart batteries. It allows users to monitor and control battery parameters. Designed for efficient battery operation and maintenance.

**Highlights:** Battery Management System (BMS), Smart battery monitoring, Battery parameter control, Efficient battery operation, Battery maintenance functions

**In-app purchases:** none


## Frequently asked questions

### Is ISD Go free?

ISD Go is free to download, with no in-app purchases.

### Is TATTU free?

TATTU is free to download, with no in-app purchases.

### Which has better reviews, ISD Go or TATTU?

ISD Go is rated higher. ISD Go averages 1.8 out of 5 from 31 ratings, while TATTU averages 1.0 from 1 ratings.

### Do ISD Go or TATTU have ads?

Neither ISD Go nor TATTU shows ads.

### Which is updated more often, ISD Go or TATTU?

ISD Go ships an update weekly, and TATTU every 2 months. Most recently, ISD Go was updated on October 24, 2026 and TATTU on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*