# Underwater Stopwatch vs Timerly

The clearest difference is iOS requirement: Timerly at 13.0 against Underwater Stopwatch's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Underwater Stopwatch ships an update every 3 days, Timerly every 4 days. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Underwater Stopwatch | Timerly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Size | 4 MB | 27 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vlad Topala](https://appshunter.io/developer/6783263834) | [Kubra Nur AKIN](https://appshunter.io/developer/1844106159) |

## What reviewers say

### 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


### Timerly

[App page](https://appshunter.io/ios/app/timerly-stopwatch-and-countdown/id6801624555)

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

**In-app purchases:** none


## Frequently asked questions

### Is Underwater Stopwatch free?

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

### Is Timerly free?

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

### Do Underwater Stopwatch or Timerly have ads?

Neither Underwater Stopwatch nor Timerly shows ads.

### Which is updated more often, Underwater Stopwatch or Timerly?

Underwater Stopwatch ships an update every 3 days, and Timerly every 4 days. Most recently, Underwater Stopwatch was updated on October 25, 2026 and Timerly on October 7, 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.*