# Unit Converter Complete vs Battery Train

The clearest difference is in-app purchases: Battery Train at none against Unit Converter Complete's 1. Battery Train also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

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

Unit Converter Complete ships an update every 6 weeks, Battery Train every 2 months. Both last shipped on October 14, 2026.

## The numbers

| Metric | Unit Converter Complete | Battery Train |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 13 MB | 24 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wahyu Salam](https://appshunter.io/developer/1738766613) | [JAEMIN LEE](https://appshunter.io/developer/1787329213) |

## What reviewers say

### Unit Converter Complete

[App page](https://appshunter.io/ios/app/unit-converter-complete/id6740201858)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version | $2.99 | one-time |


### Battery Train

[App page](https://appshunter.io/ios/app/battery-train/id6780470432)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Complete free?

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

### Is Battery Train free?

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

### Do Unit Converter Complete or Battery Train have ads?

Both Unit Converter Complete and Battery Train show ads.

### Which is updated more often, Unit Converter Complete or Battery Train?

Unit Converter Complete ships an update every 6 weeks, and Battery Train every 2 months. Most recently, Unit Converter Complete was updated on October 14, 2026 and Battery Train on October 14, 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.*