# Engine Performance Booster vs Pocket Key

The clearest difference is update cadence: Pocket Key at every 6 weeks against Engine Performance Booster's every 10 months. Engine Performance Booster's advantage is iOS requirement (10.0 vs 12.0). On price, ads, 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.

Engine Performance Booster ships an update every 10 months, Pocket Key every 6 weeks. The most recent releases landed on September 20, 2026 and June 13, 2026 respectively.

## The numbers

| Metric | Engine Performance Booster | Pocket Key |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Size | 21 MB | 32 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [STAR RIVER DIGITAL DESIGN COMPANY LIMITED](https://appshunter.io/developer/993138472) | [yong qin lin](https://appshunter.io/developer/1661512455) |

## What reviewers say

### Engine Performance Booster

[App page](https://appshunter.io/ios/app/engine-performance-booster/id1619610828)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pocket Key

[App page](https://appshunter.io/ios/app/pocket-key/id1661512453)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engine Performance Booster free?

Engine Performance Booster is free to download, with no in-app purchases.

### Is Pocket Key free?

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

### Do Engine Performance Booster or Pocket Key have ads?

Neither Engine Performance Booster nor Pocket Key shows ads.

### Which is updated more often, Engine Performance Booster or Pocket Key?

Engine Performance Booster ships an update every 10 months, and Pocket Key every 6 weeks. Most recently, Engine Performance Booster was updated on September 20, 2026 and Pocket Key on June 13, 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.*