# Contour Detection vs miniDSP BT Update

The clearest difference is ads: miniDSP BT Update at none against Contour Detection's shown. miniDSP BT Update also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.7.2). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Contour Detection ships an update fortnightly, miniDSP BT Update monthly. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Contour Detection | miniDSP BT Update |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Monthly |
| Size | 36 MB | 6 MB |
| Requires iOS | 17.7.2 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [miniDSP Ltd](https://appshunter.io/developer/945240203) |

## What reviewers say

### Contour Detection

[App page](https://appshunter.io/ios/app/contour-detection/id6511213082)

**Features:** macOS Compatibility

**In-app purchases:** none


### miniDSP BT Update

[App page](https://appshunter.io/ios/app/minidsp-bt-update/id6749021623)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Contour Detection free?

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

### Is miniDSP BT Update free?

miniDSP BT Update is free to download, with no in-app purchases.

### Do Contour Detection or miniDSP BT Update have ads?

Contour Detection shows ads; miniDSP BT Update does not.

### Which is updated more often, Contour Detection or miniDSP BT Update?

Contour Detection ships an update fortnightly, and miniDSP BT Update monthly. Most recently, Contour Detection was updated on October 15, 2026 and miniDSP BT Update on October 8, 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.*