# iStopwatch vs CPU

The clearest difference is price: iStopwatch at Free against CPU's $0.99. CPU's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

iStopwatch is free to download; CPU costs $0.99 up front. iStopwatch sells 1 one-off in-app purchase. CPU asks for nothing beyond the download.

iStopwatch ships an update monthly, CPU every 6 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iStopwatch | CPU |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cpu-x-max/id1526981216/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 82.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | — | Paid |
| Size | 9 MB | 16 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [景珂 陈](https://appshunter.io/developer/620312170) | [佰臣 费](https://appshunter.io/developer/1516074077) |

## What reviewers say

### iStopwatch

[App page](https://appshunter.io/ios/app/istopwatch-lcd-timer/id1143929948)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $1.99 | one-time |


### CPU

[App page](https://appshunter.io/ios/app/cpu-x-max/id1526981216)

This utility app assists designers in adapting to various phone screen sizes and resolutions. It also helps developers understand and evaluate device performance.

**Highlights:** Screen size adaptation, Resolution checking, Device performance analysis, Developer insights, Designer tools

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

**In-app purchases:** none


## Frequently asked questions

### Is iStopwatch free?

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

### Is CPU free?

CPU costs $0.99, with no in-app purchases.

### Do iStopwatch or CPU have ads?

iStopwatch shows ads; CPU does not.

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

iStopwatch ships an update monthly, and CPU every 6 weeks. Most recently, iStopwatch was updated on November 6, 2026 and CPU on November 3, 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.*