# Tags CrystalSound vs DetectVision

The clearest difference is ads: Tags CrystalSound at none against DetectVision's shown. Tags CrystalSound also leads on iOS requirement (13.0 vs 15.1). DetectVision's advantage is update cadence (weekly vs every 21 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.

Tags CrystalSound ships an update every 21 months, DetectVision weekly. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Tags CrystalSound | DetectVision |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Weekly** |
| Size | 18 MB | 45 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Sound S.R.L.](https://appshunter.io/developer/1502775701) | [REN ROBOT LTD.](https://appshunter.io/developer/1737295388) |

## What reviewers say

### Tags CrystalSound

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DetectVision

[App page](https://appshunter.io/ios/app/detectvision/id6745051002)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tags CrystalSound free?

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

### Is DetectVision free?

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

### Do Tags CrystalSound or DetectVision have ads?

DetectVision shows ads; Tags CrystalSound does not.

### Which is updated more often, Tags CrystalSound or DetectVision?

Tags CrystalSound ships an update every 21 months, and DetectVision weekly. Most recently, Tags CrystalSound was updated on September 8, 2026 and DetectVision on September 20, 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.*