# ESF vs Swimming Timer

The clearest difference is in-app purchases: ESF at none against Swimming Timer's 2. ESF also leads on ads (none vs shown). Swimming Timer's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Swimming Timer sells 2 one-off in-app purchases. ESF asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ESF | Swimming Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/swimming-timer/id1627209712/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 34 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Enric Serrano Murt](https://appshunter.io/developer/1111151114) | [NAOYA ONO](https://appshunter.io/developer/1530328146) |

## What reviewers say

### ESF

[App page](https://appshunter.io/ios/app/esf/id1441362200)

**Features:** macOS Compatibility

**In-app purchases:** none


### Swimming Timer

[App page](https://appshunter.io/ios/app/swimming-timer/id1627209712)

This app helps swimmers practice race starts with customizable timers and randomized delays. It also functions as a stopwatch to accurately measure lap and split times during training. Results can be saved and organized by date, with customizable event names and color themes.

**Highlights:** Customizable race start timer, Randomized start delays, Lap and split time measurement, Save and view results by date, Editable event names, Customizable color themes

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $0.99 | one-time |
| Remove ads | $6.99 | one-time |


## Frequently asked questions

### Is ESF free?

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

### Is Swimming Timer free?

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

### Do ESF or Swimming Timer have ads?

Swimming Timer shows ads; ESF does not.

### Which is updated more often, ESF or Swimming Timer?

ESF ships an update every 3 months, and Swimming Timer every 3 months. Most recently, ESF was updated on November 2, 2026 and Swimming Timer on November 3, 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.*