# Peripheral AI vs Tags CrystalSound

The clearest difference is update cadence: Peripheral AI at every 6 days against Tags CrystalSound's every 21 months. Tags CrystalSound's advantage is iOS requirement (13.0 vs 18.0). 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.

Peripheral AI ships an update every 6 days, Tags CrystalSound every 21 months. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Peripheral AI | Tags CrystalSound |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 21 months |
| Size | 35 MB | 18 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Peripheral AI](https://appshunter.io/developer/1740959895) | [Crystal Sound S.R.L.](https://appshunter.io/developer/1502775701) |

## What reviewers say

### Peripheral AI

[App page](https://appshunter.io/ios/app/peripheral-ai/id6497229169)

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

**In-app purchases:** none


### Tags CrystalSound

[App page](https://appshunter.io/ios/app/tags-crystalsound/id6502644633)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peripheral AI free?

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

### Is Tags CrystalSound free?

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

### Do Peripheral AI or Tags CrystalSound have ads?

Neither Peripheral AI nor Tags CrystalSound shows ads.

### Which is updated more often, Peripheral AI or Tags CrystalSound?

Peripheral AI ships an update every 6 days, and Tags CrystalSound every 21 months. Most recently, Peripheral AI was updated on October 18, 2026 and Tags CrystalSound on October 11, 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.*