# iStopwatch vs 石油助手

The clearest difference is in-app purchases: 石油助手 at none against iStopwatch's 1. 石油助手 also leads on ads (none vs shown) and update cadence (every 2 weeks vs monthly). On price and device support there is nothing between them.

Both are free to download. iStopwatch sells 1 one-off in-app purchase. 石油助手 asks for nothing beyond the download.

iStopwatch ships an update monthly, 石油助手 every 2 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | iStopwatch | 石油助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 9 MB | 36 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [景珂 陈](https://appshunter.io/developer/620312170) | [Sichuan Jupai Technology Co., Ltd.](https://appshunter.io/developer/1896742899) |

## 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 |


### 石油助手

[App page](https://appshunter.io/ios/app/id6772124729)

**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 石油助手 free?

石油助手 is free to download, with no in-app purchases.

### Do iStopwatch or 石油助手 have ads?

iStopwatch shows ads; 石油助手 does not.

### Which is updated more often, iStopwatch or 石油助手?

iStopwatch ships an update monthly, and 石油助手 every 2 weeks. Most recently, iStopwatch was updated on November 6, 2026 and 石油助手 on November 5, 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.*