# Multi Timer Interval Stopwatch vs Underwater Stopwatch

The clearest difference is ads: Underwater Stopwatch at none against Multi Timer Interval Stopwatch's shown. Underwater Stopwatch also leads on update cadence (every 3 days vs weekly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Multi Timer Interval Stopwatch ships an update weekly, Underwater Stopwatch every 3 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Multi Timer Interval Stopwatch | Underwater Stopwatch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 3 days** |
| Size | 37 MB | 4 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Soufiane Elgarah](https://appshunter.io/developer/1809878634) | [Vlad Topala](https://appshunter.io/developer/6783263834) |

## What reviewers say

### Multi Timer Interval Stopwatch

[App page](https://appshunter.io/ios/app/multi-timer-interval-stopwatch/id6766594693)

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

**In-app purchases:** none


### Underwater Stopwatch

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Multi Timer Interval Stopwatch free?

Multi Timer Interval Stopwatch is free to download, with no in-app purchases.

### Is Underwater Stopwatch free?

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

### Do Multi Timer Interval Stopwatch or Underwater Stopwatch have ads?

Multi Timer Interval Stopwatch shows ads; Underwater Stopwatch does not.

### Which is updated more often, Multi Timer Interval Stopwatch or Underwater Stopwatch?

Multi Timer Interval Stopwatch ships an update weekly, and Underwater Stopwatch every 3 days. Most recently, Multi Timer Interval Stopwatch was updated on September 24, 2026 and Underwater Stopwatch on September 22, 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.*