# BATT SYNC vs GYS

The clearest difference is update cadence: GYS at every 2 months against BATT SYNC's every 6 months. GYS also leads on iOS requirement (11.0 vs 15.6). 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, GYS every 2 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | BATT SYNC | GYS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 34 MB | 23 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [DHC Specialty Corp.](https://appshunter.io/developer/1130832649) | [GYS](https://appshunter.io/developer/1387141955) |

## 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


### GYS

[App page](https://appshunter.io/ios/app/gys-btw-6v12v/id6444179775)

**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 GYS free?

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

### Do BATT SYNC or GYS have ads?

Neither BATT SYNC nor GYS shows ads.

### Which is updated more often, BATT SYNC or GYS?

BATT SYNC ships an update every 6 months, and GYS every 2 months. Most recently, BATT SYNC was updated on September 21, 2026 and GYS on September 18, 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.*