# RFR901 APP vs Device ID Check Tool

The clearest difference is ads: RFR901 APP at none against Device ID Check Tool's shown. RFR901 APP also leads on iOS requirement (11.0 vs 18.2). Device ID Check Tool's advantage is update cadence (weekly vs every 2 months). On price, 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.

RFR901 APP ships an update every 2 months, Device ID Check Tool weekly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | RFR901 APP | Device ID Check Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 5 MB | 4 MB |
| Requires iOS | **11.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bluebirdcorp](https://appshunter.io/developer/1290195462) | [Mizuki Hoshida](https://appshunter.io/developer/1797942917) |

## What reviewers say

### RFR901 APP

[App page](https://appshunter.io/ios/app/rfr901-app/id6450923548)

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

**In-app purchases:** none


### Device ID Check Tool

[App page](https://appshunter.io/ios/app/device-id-check-tool/id6742742567)

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

**In-app purchases:** none


## Frequently asked questions

### Is RFR901 APP free?

RFR901 APP is free to download, with no in-app purchases.

### Is Device ID Check Tool free?

Device ID Check Tool is free to download, with no in-app purchases.

### Do RFR901 APP or Device ID Check Tool have ads?

Device ID Check Tool shows ads; RFR901 APP does not.

### Which is updated more often, RFR901 APP or Device ID Check Tool?

RFR901 APP ships an update every 2 months, and Device ID Check Tool weekly. Most recently, RFR901 APP was updated on October 27, 2026 and Device ID Check Tool on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*