# Energy Efficiency Technologies vs Keefrash

The clearest difference is ads: Energy Efficiency Technologies at none against Keefrash's shown. Energy Efficiency Technologies also leads on iOS requirement (9.0 vs 13.0). 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.

Energy Efficiency Technologies ships an update every 9 days, Keefrash every 8 days. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Energy Efficiency Technologies | Keefrash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/keefrash/id6738633635/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 8 days** |
| Monetization | — | Ad-supported |
| Size | 99 MB | 107 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 9+ |
| Developer | [Guangdong Meizhi Compressor Co., Ltd.](https://appshunter.io/developer/1441287281) | [SUMMITMOB, INC.](https://appshunter.io/developer/1781582653) |

## What reviewers say

### Energy Efficiency Technologies

[App page](https://appshunter.io/ios/app/energy-efficiency-technologies/id6450695630)

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

**In-app purchases:** none


### Keefrash

[App page](https://appshunter.io/ios/app/keefrash/id6738633635)

Customize your phone case with dynamic ink screen displays. Upload your own images or share your creations with a community. Supports multiple languages for a global user experience.

**Highlights:** Customize phone case ink screen, NFC image transfer, DIY screen designs, Publish creations to Plaza, Multi-language support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Energy Efficiency Technologies free?

Energy Efficiency Technologies is free to download, with no in-app purchases.

### Is Keefrash free?

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

### Do Energy Efficiency Technologies or Keefrash have ads?

Keefrash shows ads; Energy Efficiency Technologies does not.

### Which is updated more often, Energy Efficiency Technologies or Keefrash?

Energy Efficiency Technologies ships an update every 9 days, and Keefrash every 8 days. Most recently, Energy Efficiency Technologies was updated on October 10, 2026 and Keefrash on October 8, 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.*