# Semantic Segmentation vs Underlayer

The clearest difference is in-app purchases: Semantic Segmentation at none against Underlayer's 1. Semantic Segmentation also leads on update cadence (every 11 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days. Semantic Segmentation asks for nothing beyond the download.

Semantic Segmentation ships an update every 11 days, Underlayer monthly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Semantic Segmentation | Underlayer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 11 days** | Monthly |
| Size | 159 MB | 179 MB |
| Requires iOS | 17.7.2 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) |

## What reviewers say

### Semantic Segmentation

[App page](https://appshunter.io/ios/app/semantic-segmentation/id6511210084)

**Features:** macOS Compatibility

**In-app purchases:** none


### Underlayer

[App page](https://appshunter.io/ios/app/underlayer-hide-text-in-photo/id6753363956)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per 7 days |


## Frequently asked questions

### Is Semantic Segmentation free?

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

### Is Underlayer free?

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

### Do Semantic Segmentation or Underlayer have ads?

Both Semantic Segmentation and Underlayer show ads.

### Which is updated more often, Semantic Segmentation or Underlayer?

Semantic Segmentation ships an update every 11 days, and Underlayer monthly. Most recently, Semantic Segmentation was updated on November 4, 2026 and Underlayer on October 30, 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.*