# WattSaver for Octopus Energy vs Three Device Security

The clearest difference is in-app purchases: Three Device Security at none against WattSaver for Octopus Energy's 1. Three Device Security also leads on iOS requirement (14.0 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. WattSaver for Octopus Energy sells 1 one-off in-app purchase. Three Device Security asks for nothing beyond the download.

## The numbers

| Metric | WattSaver for Octopus Energy | Three Device Security |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 23 MB | 68 MB |
| Requires iOS | 17.5 | **14.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [motocode ltd](https://appshunter.io/developer/428397794) | [Hutchison 3G UK Ltd](https://appshunter.io/developer/393530269) |

## What reviewers say

### WattSaver for Octopus Energy

[App page](https://appshunter.io/ios/app/wattsaver-for-octopus-energy/id6689521694)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WattSaver Pro | $2.99 | one-time |


### Three Device Security

[App page](https://appshunter.io/ios/app/three-device-security/id6737277850)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is WattSaver for Octopus Energy free?

WattSaver for Octopus Energy is free to download, with in-app purchases available.

### Is Three Device Security free?

Three Device Security is free to download, with no in-app purchases.

### Do WattSaver for Octopus Energy or Three Device Security have ads?

Neither WattSaver for Octopus Energy nor Three Device Security 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.*