# Adam and Sarah's World vs Feature Function Class

The clearest difference is update cadence: Adam and Sarah's World at every 10 days against Feature Function Class's every 2 months. Adam and Sarah's World also leads on iOS requirement (13.0 vs 18.6). 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.

Adam and Sarah's World ships an update every 10 days, Feature Function Class every 2 months. The most recent releases landed on September 19, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Adam and Sarah's World | 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 10 days** | Every 2 months |
| Monetization | — | Free |
| Size | 37 MB | 101 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jannat Behbehani](https://appshunter.io/developer/1851963322) | [JudeWorks](https://appshunter.io/developer/1749456254) |

## What reviewers say

### Adam and Sarah's World

[App page](https://appshunter.io/ios/app/adam-and-sarahs-world/id6755106430)

**Features:** macOS Compatibility

**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 Adam and Sarah's World free?

Adam and Sarah's World 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 Adam and Sarah's World or Feature Function Class have ads?

Neither Adam and Sarah's World nor Feature Function Class shows ads.

### Which is updated more often, Adam and Sarah's World or Feature Function Class?

Adam and Sarah's World ships an update every 10 days, and Feature Function Class every 2 months. Most recently, Adam and Sarah's World was updated on September 19, 2026 and Feature Function Class on September 11, 2026.

---

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