# e vs Unit Converter for Physics

The clearest difference is in-app purchases: e at none against Unit Converter for Physics's 1. e also leads on iOS requirement (12.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Unit Converter for Physics sells 1 one-off in-app purchase. e asks for nothing beyond the download.

e ships an update weekly, Unit Converter for Physics every 10 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | e | Unit Converter for Physics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Size | 111 MB | 2 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thai Marine](https://appshunter.io/developer/1297380699) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-285-plus/id1645465595)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter for Physics

[App page](https://appshunter.io/ios/app/unit-converter-for-physics/id6745997040)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Solution | $0.99 | one-time |


## Frequently asked questions

### Is e free?

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

### Is Unit Converter for Physics free?

Unit Converter for Physics is free to download, with in-app purchases available.

### Do e or Unit Converter for Physics have ads?

Neither e nor Unit Converter for Physics shows ads.

### Which is updated more often, e or Unit Converter for Physics?

e ships an update weekly, and Unit Converter for Physics every 10 days. Most recently, e was updated on October 2, 2026 and Unit Converter for Physics on October 6, 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.*