# STW POWSTAR vs RF OS

STW POWSTAR and RF OS are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

STW POWSTAR ships an update every 2 months, RF OS monthly. The most recent releases landed on September 17, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | STW POWSTAR | RF OS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 59 MB | 39 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Shenzhen Zhongxinli Electronic Technology Co., Ltd.](https://appshunter.io/developer/1486558750) | [RF Labs, Inc.](https://appshunter.io/developer/1592838182) |

## What reviewers say

### STW POWSTAR

[App page](https://appshunter.io/ios/app/stw-powstar/id1546721700)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### RF OS

[App page](https://appshunter.io/ios/app/rf-os/id6748840322)

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

**In-app purchases:** none


## Frequently asked questions

### Is STW POWSTAR free?

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

### Is RF OS free?

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

### Do STW POWSTAR or RF OS have ads?

Neither STW POWSTAR nor RF OS shows ads.

### Which is updated more often, STW POWSTAR or RF OS?

STW POWSTAR ships an update every 2 months, and RF OS monthly. Most recently, STW POWSTAR was updated on September 17, 2026 and RF OS on September 1, 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.*