# Convertall vs Plain Units

The clearest difference is iOS requirement: Plain Units at 16.4 against Convertall's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Convertall sells 1 one-off in-app purchase and Plain Units sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Convertall ships an update every 5 weeks, Plain Units every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Convertall | Plain Units |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 5 MB | 48 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Laurent ABITBOL](https://appshunter.io/developer/1844389313) | [Nicolaus Lawson](https://appshunter.io/developer/1029201825) |

## What reviewers say

### Convertall

[App page](https://appshunter.io/ios/app/convertall-unit-converter/id6789253598)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Plain Units

[App page](https://appshunter.io/ios/app/plain-units-unit-converter/id6810955046)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Convertall free?

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

### Is Plain Units free?

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

### Do Convertall or Plain Units have ads?

Both Convertall and Plain Units show ads.

### Which is updated more often, Convertall or Plain Units?

Convertall ships an update every 5 weeks, and Plain Units every 3 weeks. Most recently, Convertall was updated on October 31, 2026 and Plain Units on October 31, 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.*