# Einar Gate vs Acoustic Detector

The clearest difference is in-app purchases: Einar Gate at none against Acoustic Detector's 1. Einar Gate also leads on iOS requirement (15.0 vs 17.0). Acoustic Detector's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads and device support there is nothing between them.

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

Einar Gate ships an update every 3 weeks, Acoustic Detector every 4 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Einar Gate | Acoustic Detector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 17 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Adaptive Recognition Global Services ApS](https://appshunter.io/developer/1885802352) | [Jean-David Giroux](https://appshunter.io/developer/6796142518) |

## What reviewers say

### Einar Gate

[App page](https://appshunter.io/ios/app/einar-gate/id6636552124)

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

**In-app purchases:** none


### Acoustic Detector

[App page](https://appshunter.io/ios/app/acoustic-detector/id6810440422)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acoustic Detector Complete | $3.99 | one-time |


## Frequently asked questions

### Is Einar Gate free?

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

### Is Acoustic Detector free?

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

### Do Einar Gate or Acoustic Detector have ads?

Neither Einar Gate nor Acoustic Detector shows ads.

### Which is updated more often, Einar Gate or Acoustic Detector?

Einar Gate ships an update every 3 weeks, and Acoustic Detector every 4 days. Most recently, Einar Gate was updated on October 27, 2026 and Acoustic Detector on October 24, 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.*