# Contour Detection vs MaLaTang

The clearest difference is update cadence: Contour Detection at fortnightly against MaLaTang's every 3 months. 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.

Contour Detection ships an update fortnightly, MaLaTang every 3 months. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Contour Detection | MaLaTang |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 36 MB | 5 MB |
| Requires iOS | 17.7.2 | **17.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [逵逵 沈](https://appshunter.io/developer/617643493) |

## What reviewers say

### Contour Detection

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

**Features:** macOS Compatibility

**In-app purchases:** none


### MaLaTang

[App page](https://appshunter.io/ios/app/malatang/id6743385191)

**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 MaLaTang free?

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

### Do Contour Detection or MaLaTang have ads?

Both Contour Detection and MaLaTang show ads.

### Which is updated more often, Contour Detection or MaLaTang?

Contour Detection ships an update fortnightly, and MaLaTang every 3 months. Most recently, Contour Detection was updated on November 4, 2026 and MaLaTang on October 28, 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.*