# CERI vs Feature Function Class

The clearest difference is rating: Feature Function Class at 5.0 against CERI's 1.0. Feature Function Class also leads on in-app purchases (none vs 1). CERI's advantage is iOS requirement (6.0 vs 18.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. CERI sells 1 one-off in-app purchase. Feature Function Class asks for nothing beyond the download.

Feature Function Class holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

CERI ships an update every 5 weeks, Feature Function Class every 2 months. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | CERI | Feature Function Class |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/ceri-lutung-kasarung/id896923396/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/feature-function-class/id6755350562/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 65 MB | 101 MB |
| Requires iOS | **6.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VARNION TECHNOLOGY SEMESTA, PT](https://appshunter.io/developer/551518131) | [JudeWorks](https://appshunter.io/developer/1749456254) |

## What reviewers say

### CERI

[App page](https://appshunter.io/ios/app/ceri-lutung-kasarung/id896923396)

Explore Indonesian folklore through an interactive storybook. This app features charming graphics, engaging activities, and moral values, offering a fun and educational experience for young readers.

**Highlights:** Interactive storybook, Charming graphics, Moral values, Engaging activities, Multi-language support, Page flipping options

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Version | $2.99 | one-time |


### 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 CERI free?

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

### Is Feature Function Class free?

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

### Which has better reviews, CERI or Feature Function Class?

Feature Function Class is rated higher. CERI averages 1.0 out of 5 from 1 ratings, while Feature Function Class averages 5.0 from 1 ratings.

### Do CERI or Feature Function Class have ads?

Neither CERI nor Feature Function Class shows ads.

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

CERI ships an update every 5 weeks, and Feature Function Class every 2 months. Most recently, CERI was updated on October 7, 2026 and Feature Function Class on October 15, 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.*