# VSG102 Update vs ThunDer Fast Charge

The clearest difference is update cadence: ThunDer Fast Charge at every 3 weeks against VSG102 Update's every 2 months. ThunDer Fast Charge also leads on iOS requirement (12.0 vs 14.0). 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.

VSG102 Update ships an update every 2 months, ThunDer Fast Charge every 3 weeks. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | VSG102 Update | ThunDer Fast Charge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 2 MB | 19 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VITALSIGNS TECHNOLOGY CO., LTD.](https://appshunter.io/developer/1394370436) | [Dong Guan Zhengyang Electronic Mechanical Ltd](https://appshunter.io/developer/1311264915) |

## What reviewers say

### VSG102 Update

[App page](https://appshunter.io/ios/app/vsg102-update/id1659602281)

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

**In-app purchases:** none


### ThunDer Fast Charge

[App page](https://appshunter.io/ios/app/thunder-fast-charge/id6444782261)

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

**In-app purchases:** none


## Frequently asked questions

### Is VSG102 Update free?

VSG102 Update is free to download, with no in-app purchases.

### Is ThunDer Fast Charge free?

ThunDer Fast Charge is free to download, with no in-app purchases.

### Do VSG102 Update or ThunDer Fast Charge have ads?

Neither VSG102 Update nor ThunDer Fast Charge shows ads.

### Which is updated more often, VSG102 Update or ThunDer Fast Charge?

VSG102 Update ships an update every 2 months, and ThunDer Fast Charge every 3 weeks. Most recently, VSG102 Update was updated on October 17, 2026 and ThunDer Fast Charge on October 9, 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.*