# Underlayer vs umcode

The clearest difference is in-app purchases: umcode at none against Underlayer's 1. umcode also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 5 months). On price, 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. umcode asks for nothing beyond the download.

Underlayer ships an update every 5 months, umcode every 5 weeks. Both last shipped on October 1, 2026.

## The numbers

| Metric | Underlayer | umcode |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Size | 169 MB | 201 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) | [深圳市悠悠汇网络科技有限公司](https://appshunter.io/developer/1698967002) |

## What reviewers say

### Underlayer

[App page](https://appshunter.io/ios/app/underlayer/id6753363956)

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

**In-app purchases (1)**

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


### umcode

[App page](https://appshunter.io/ios/app/umcode/id6772873985)

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

**In-app purchases:** none


## Frequently asked questions

### Is Underlayer free?

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

### Is umcode free?

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

### Do Underlayer or umcode have ads?

Underlayer shows ads; umcode does not.

### Which is updated more often, Underlayer or umcode?

Underlayer ships an update every 5 months, and umcode every 5 weeks. Most recently, Underlayer was updated on October 1, 2026 and umcode on October 1, 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.*