# FlipFlapReferee vs REF90 Grassroots

The clearest difference is update cadence: FlipFlapReferee at fortnightly against REF90 Grassroots's every 2 months. REF90 Grassroots's advantage is device support (3 vs 1). On price, ads, in-app purchases 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.

FlipFlapReferee ships an update fortnightly, REF90 Grassroots every 2 months. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | FlipFlapReferee | REF90 Grassroots |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 35 MB | 7 MB |
| Requires iOS | **17.4** | 18.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Flipflap Technologies Ltd](https://appshunter.io/developer/1488258037) | [Instride Ltd](https://appshunter.io/developer/1844228825) |

## What reviewers say

### FlipFlapReferee

[App page](https://appshunter.io/ios/app/flipflapreferee/id1488410525)

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

**In-app purchases:** none


### REF90 Grassroots

[App page](https://appshunter.io/ios/app/ref90-grassroots/id6761438884)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is FlipFlapReferee free?

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

### Is REF90 Grassroots free?

REF90 Grassroots is free to download, with no in-app purchases.

### Do FlipFlapReferee or REF90 Grassroots have ads?

Neither FlipFlapReferee nor REF90 Grassroots shows ads.

### Which is updated more often, FlipFlapReferee or REF90 Grassroots?

FlipFlapReferee ships an update fortnightly, and REF90 Grassroots every 2 months. Most recently, FlipFlapReferee was updated on October 20, 2026 and REF90 Grassroots on October 17, 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.*