# iStopwatch vs FlowChrono

The clearest difference is in-app purchases: FlowChrono at none against iStopwatch's 1. FlowChrono also leads on update cadence (every 6 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

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

iStopwatch ships an update monthly, FlowChrono every 6 days. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | iStopwatch | FlowChrono |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 6 days** |
| Size | 9 MB | 46 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [景珂 陈](https://appshunter.io/developer/620312170) | [泽鑫 王](https://appshunter.io/developer/1736653110) |

## 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 |


### FlowChrono

[App page](https://appshunter.io/ios/app/flowchrono/id6759900174)

**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 FlowChrono free?

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

### Do iStopwatch or FlowChrono have ads?

Both iStopwatch and FlowChrono show ads.

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

iStopwatch ships an update monthly, and FlowChrono every 6 days. Most recently, iStopwatch was updated on October 1, 2026 and FlowChrono on September 30, 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.*