# Unit Converter Simple vs TMdrive

The clearest difference is ads: TMdrive at none against Unit Converter Simple's shown. On price, update cadence, 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.

Unit Converter Simple ships an update every 10 months, TMdrive every 20 months. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Unit Converter Simple | TMdrive |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 10 months** | Every 20 months |
| Size | 18 MB | 105 MB |
| Requires iOS | 13.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [東芝三菱電機産業システム株式会社(TMEIC)](https://appshunter.io/developer/1333406388) |

## What reviewers say

### Unit Converter Simple

[App page](https://appshunter.io/ios/app/unit-converter-simple/id1531846614)

**Features:** macOS Compatibility

**In-app purchases:** none


### TMdrive

[App page](https://appshunter.io/ios/app/tmdrive-e3-support-global/id1561738611)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Simple free?

Unit Converter Simple is free to download, with no in-app purchases.

### Is TMdrive free?

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

### Do Unit Converter Simple or TMdrive have ads?

Unit Converter Simple shows ads; TMdrive does not.

### Which is updated more often, Unit Converter Simple or TMdrive?

Unit Converter Simple ships an update every 10 months, and TMdrive every 20 months. Most recently, Unit Converter Simple was updated on October 8, 2026 and TMdrive on October 3, 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.*