# Piano Prober vs EMX RFID

The clearest difference is update cadence: Piano Prober at every 5 weeks against EMX RFID's every 8 months. Piano Prober also leads on iOS requirement (12.0 vs 14.2). 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.

Piano Prober ships an update every 5 weeks, EMX RFID every 8 months. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Piano Prober | EMX RFID |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 8 months |
| Size | 10 MB | 58 MB |
| Requires iOS | **12.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [绍军 初](https://appshunter.io/developer/1195414685) | [EMX Industries Inc](https://appshunter.io/developer/791759563) |

## What reviewers say

### Piano Prober

[App page](https://appshunter.io/ios/app/piano-prober/id1209745376)

**Features:** macOS Compatibility

**In-app purchases:** none


### EMX RFID

[App page](https://appshunter.io/ios/app/emx-rfid/id6502665357)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Piano Prober free?

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

### Is EMX RFID free?

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

### Do Piano Prober or EMX RFID have ads?

Neither Piano Prober nor EMX RFID shows ads.

### Which is updated more often, Piano Prober or EMX RFID?

Piano Prober ships an update every 5 weeks, and EMX RFID every 8 months. Most recently, Piano Prober was updated on October 7, 2026 and EMX RFID on October 4, 2026.

---

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