# ESF vs Referee Tools

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

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

ESF ships an update every 3 months, Referee Tools every 6 months. The most recent releases landed on May 20, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | ESF | Referee Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (4 ratings)](https://appshunter.io/ios/app/referee-tools/id1624421256/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 41 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| 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


### Referee Tools

[App page](https://appshunter.io/ios/app/referee-tools/id1624421256)

This app provides essential tools for referees, including a timer, whistle sounds, and penalty card displays. It supports various sports like soccer and rugby, with customizable options for countdowns, count-ups, and card colors.

**Highlights:** Adjustable timer (countdown/count up), Multiple whistle sounds, Full-screen penalty card display, Customizable card colors, Sound alerts for countdown timer

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $0.99 | one-time |
| Remove ads | $2.99 | one-time |


## Frequently asked questions

### Is ESF free?

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

### Is Referee Tools free?

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

### Do ESF or Referee Tools have ads?

Referee Tools shows ads; ESF does not.

### Which is updated more often, ESF or Referee Tools?

ESF ships an update every 3 months, and Referee Tools every 6 months. Most recently, ESF was updated on May 20, 2026 and Referee Tools on August 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*