# Buh! vs Feature Function Class

The clearest difference is update cadence: Feature Function Class at every 2 months against Buh!'s every 9 months. Feature Function Class also leads on iOS requirement (18.6 vs 26.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Buh! ships an update every 9 months, Feature Function Class every 2 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Buh! | Feature Function Class |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/feature-function-class/id6755350562/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 6 MB | 101 MB |
| Requires iOS | 26.6 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JOHN BURKE](https://appshunter.io/developer/1082153101) | [JudeWorks](https://appshunter.io/developer/1749456254) |

## What reviewers say

### Buh!

[App page](https://appshunter.io/ios/app/buh/id1559017209)

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

**In-app purchases:** none


### Feature Function Class

[App page](https://appshunter.io/ios/app/feature-function-class/id6755350562)

This visual teaching tool aids educators, therapists, and parents in developing receptive language and categorization skills. It uses a proven methodology to present images and test identification based on features, functions, and classes. The app offers a large image library, smart filtering, and customization options for personalized training.

**Highlights:** 300+ pre-tagged images, Smart filtering by feature, function, or class, Shuffle and Reorder modes for varied practice, Adjustable grid size for difficulty scaling, Save and load custom image sets, Import and tag personal photos, Create custom tags

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

**In-app purchases:** none


## Frequently asked questions

### Is Buh! free?

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

### Is Feature Function Class free?

Feature Function Class is free to download, with no in-app purchases.

### Do Buh! or Feature Function Class have ads?

Neither Buh! nor Feature Function Class shows ads.

### Which is updated more often, Buh! or Feature Function Class?

Buh! ships an update every 9 months, and Feature Function Class every 2 months. Most recently, Buh! was updated on October 7, 2026 and Feature Function Class on September 30, 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.*