# RTPListen vs Acoustic Tachometer

The clearest difference is in-app purchases: RTPListen at none against Acoustic Tachometer's 1. RTPListen also leads on update cadence (daily vs fortnightly) and iOS requirement (18.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Acoustic Tachometer sells 1 one-off in-app purchase. RTPListen asks for nothing beyond the download.

RTPListen ships an update daily, Acoustic Tachometer fortnightly. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RTPListen | Acoustic Tachometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Fortnightly |
| Size | 1 MB | 9 MB |
| Requires iOS | **18.1** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Peter Whiting](https://appshunter.io/developer/1647275980) | [Jan Sokol](https://appshunter.io/developer/1896490456) |

## What reviewers say

### RTPListen

[App page](https://appshunter.io/ios/app/rtplisten/id6743659755)

**Features:** macOS Compatibility

**In-app purchases:** none


### Acoustic Tachometer

[App page](https://appshunter.io/ios/app/acoustic-tachometer/id6789524641)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acoustic Tachometer Pro | $5.99 | one-time |


## Frequently asked questions

### Is RTPListen free?

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

### Is Acoustic Tachometer free?

Acoustic Tachometer is free to download, with in-app purchases available.

### Do RTPListen or Acoustic Tachometer have ads?

Neither RTPListen nor Acoustic Tachometer shows ads.

### Which is updated more often, RTPListen or Acoustic Tachometer?

RTPListen ships an update daily, and Acoustic Tachometer fortnightly. Most recently, RTPListen was updated on October 8, 2026 and Acoustic Tachometer on October 25, 2026.

---

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