# VoltKeep vs ComPhysics Green UV

The clearest difference is in-app purchases: ComPhysics Green UV at none against VoltKeep's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. VoltKeep sells 2 in-app purchases, starting at $4.99 per month. ComPhysics Green UV asks for nothing beyond the download.

## The numbers

| Metric | VoltKeep | ComPhysics Green UV |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 74 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuto Furudate](https://appshunter.io/developer/1886072871) | [ComPhysics](https://appshunter.io/developer/1821978540) |

## What reviewers say

### VoltKeep

[App page](https://appshunter.io/ios/app/voltkeep-tesla/id6760900723)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $49.99 | per year |


### ComPhysics Green UV

[App page](https://appshunter.io/ios/app/comphysics-green-uv/id6794469621)

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

**In-app purchases:** none


## Frequently asked questions

### Is VoltKeep free?

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

### Is ComPhysics Green UV free?

ComPhysics Green UV is free to download, with no in-app purchases.

### Do VoltKeep or ComPhysics Green UV have ads?

Neither VoltKeep nor ComPhysics Green UV shows ads.

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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.*