# MyChronoPro vs Underwater Stopwatch & Timer

The clearest difference is in-app purchases: Underwater Stopwatch & Timer at none against MyChronoPro's 1. Underwater Stopwatch & Timer also leads on update cadence (every 5 days vs fortnightly) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. MyChronoPro sells 1 one-off in-app purchase. Underwater Stopwatch & Timer asks for nothing beyond the download.

MyChronoPro ships an update fortnightly, Underwater Stopwatch & Timer every 5 days. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | MyChronoPro | Underwater Stopwatch & Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mychronopro-stopwatch-plus-timer/id6746975883/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Size | 37 MB | 4 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Lionel Ng](https://appshunter.io/developer/1819297057) | [Softuki SRL](https://appshunter.io/developer/6783263834) |

## What reviewers say

### MyChronoPro

[App page](https://appshunter.io/ios/app/mychronopro-stopwatch-plus-timer/id6746975883)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Icon Pack | $2.99 | one-time |


### Underwater Stopwatch & Timer

[App page](https://appshunter.io/ios/app/underwater-stopwatch-and-timer/id6783263832)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MyChronoPro free?

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

### Is Underwater Stopwatch & Timer free?

Underwater Stopwatch & Timer is free to download, with no in-app purchases.

### Do MyChronoPro or Underwater Stopwatch & Timer have ads?

Neither MyChronoPro nor Underwater Stopwatch & Timer shows ads.

### Which is updated more often, MyChronoPro or Underwater Stopwatch & Timer?

MyChronoPro ships an update fortnightly, and Underwater Stopwatch & Timer every 5 days. Most recently, MyChronoPro was updated on November 5, 2026 and Underwater Stopwatch & Timer on November 1, 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.*