# STW POWER vs SD Master

The clearest difference is iOS requirement: SD Master at 9.0 against STW POWER's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

STW POWER ships an update every 6 weeks, SD Master every 2 months. The most recent releases landed on June 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | STW POWER | SD Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 60 MB | 28 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 17+ |
| Developer | [Shenzhen Zhongxinli Electronic Technology Co., Ltd.](https://appshunter.io/developer/1486558750) | [Shenzhen Zhumang Information Technology Co., Ltd.](https://appshunter.io/developer/1578234346) |

## What reviewers say

### STW POWER

[App page](https://appshunter.io/ios/app/stw-power/id1488868874)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### SD Master

[App page](https://appshunter.io/ios/app/sd-master/id1491447628)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STW POWER free?

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

### Is SD Master free?

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

### Do STW POWER or SD Master have ads?

Neither STW POWER nor SD Master shows ads.

### Which is updated more often, STW POWER or SD Master?

STW POWER ships an update every 6 weeks, and SD Master every 2 months. Most recently, STW POWER was updated on June 10, 2026 and SD Master 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.*