# CPU vs KeepLit

The clearest difference is ads: KeepLit at none against CPU's shown. CPU's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. CPU sells 1 one-off in-app purchase and KeepLit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CPU ships an update fortnightly, KeepLit every 9 days. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | CPU | KeepLit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (111 ratings)](https://appshunter.io/ios/app/cpu-x/id6448917309/reviews)** | — |
| Number of ratings | **111** | — |
| Positive reviews | 61.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 170 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CHENGDU MIAOZHI TECHNOLOGY CO., LTD.](https://appshunter.io/developer/1465440799) | [ChihHung Chang](https://appshunter.io/developer/1882934211) |

## What reviewers say

### CPU

[App page](https://appshunter.io/ios/app/cpu-x/id6448917309)

This app provides detailed insights into your device's hardware and real-time diagnostics. It also offers tools to optimize storage by compressing media and cleaning contacts, along with a comprehensive suite for testing device sensors and network functions.

**Highlights:** Comprehensive device hardware insights, Real-time diagnostics and sensor testing, Video and image compression, Duplicate contact cleanup, Junk mail and spam message filtering, Network diagnostics tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $5.99 | one-time |


### KeepLit

[App page](https://appshunter.io/ios/app/keeplit-screen-always-on/id6760643625)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


## Frequently asked questions

### Is CPU free?

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

### Is KeepLit free?

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

### Do CPU or KeepLit have ads?

CPU shows ads; KeepLit does not.

### Which is updated more often, CPU or KeepLit?

CPU ships an update fortnightly, and KeepLit every 9 days. Most recently, CPU was updated on October 20, 2026 and KeepLit on October 11, 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.*