# BATT SYNC vs JT606 Calibration Tool

The clearest difference is update cadence: JT606 Calibration Tool at every 3 months against BATT SYNC's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BATT SYNC ships an update every 6 months, JT606 Calibration Tool every 3 months. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | BATT SYNC | JT606 Calibration Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Size | 34 MB | 13 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DHC Specialty Corp.](https://appshunter.io/developer/1130832649) | [SHENZHEN JOINT TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1070842011) |

## What reviewers say

### BATT SYNC

[App page](https://appshunter.io/ios/app/batt-sync/id1286964635)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### JT606 Calibration Tool

[App page](https://appshunter.io/ios/app/jt606-calibration-tool/id6446422488)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BATT SYNC free?

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

### Is JT606 Calibration Tool free?

JT606 Calibration Tool is free to download, with no in-app purchases.

### Do BATT SYNC or JT606 Calibration Tool have ads?

Neither BATT SYNC nor JT606 Calibration Tool shows ads.

### Which is updated more often, BATT SYNC or JT606 Calibration Tool?

BATT SYNC ships an update every 6 months, and JT606 Calibration Tool every 3 months. Most recently, BATT SYNC was updated on September 21, 2026 and JT606 Calibration Tool on September 8, 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.*