# Test Prep for GRE Psychology vs Feature Function Class

The clearest difference is in-app purchases: Feature Function Class at none against Test Prep for GRE Psychology's 9. Feature Function Class also leads on update cadence (every 2 months vs every 8 months). Test Prep for GRE Psychology's advantage is ratings volume (4 vs 1) and iOS requirement (15.1 vs 18.6). On price, rating, ads and device support there is nothing between them.

Both are free to download. Test Prep for GRE Psychology sells 9 in-app purchases, starting at $8.99 per 7 days. Feature Function Class asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Test Prep for GRE Psychology against 5.0 for Feature Function Class. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Test Prep for GRE Psychology ships an update every 8 months, Feature Function Class every 2 months. The most recent releases landed on August 31, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Test Prep for GRE Psychology | Feature Function Class |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/test-prep-for-gre-psychology/id6479675386/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/feature-function-class/id6755350562/reviews) |
| Number of ratings | **4** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 101 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) | [JudeWorks](https://appshunter.io/developer/1749456254) |

## What reviewers say

### Test Prep for GRE Psychology

[App page](https://appshunter.io/ios/app/test-prep-for-gre-psychology/id6479675386)

Prepare for the GRE Psychology Subject Test with over 1000 practice questions, realistic simulations, and detailed explanations. Tailor your study with focused plans and track your progress to master key concepts and achieve your target score.

**Highlights:** 1000+ practice questions, Realistic exam simulations, Detailed answer explanations, Personalized study plans, Progress tracking analytics, Peer comparison feature, Interactive learning tools

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GRE Psychology Weekly Access | $8.99 | per 7 days |
| GRE Psychology Monthly Access | $19.99 | per month |
| GRE Psychology Monthly Access | $24.99 | per month |
| GRE Quarterly Full Access | $55.99 | per 3 months |
| GRE Quarterly Full Access | $59.99 | per 3 months |
| GRE Semiannual Full Access | $75.99 | per 6 months |
| GRE Semiannual Full Access | $79.99 | per 6 months |
| GRE Annual Full Access | $109.99 | per year |
| GRE Annual Full Access | $119.99 | per year |


### 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 Test Prep for GRE Psychology free?

Test Prep for GRE Psychology 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, Test Prep for GRE Psychology or Feature Function Class?

Test Prep for GRE Psychology and Feature Function Class are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Test Prep for GRE Psychology or Feature Function Class have ads?

Neither Test Prep for GRE Psychology nor Feature Function Class shows ads.

### Which is updated more often, Test Prep for GRE Psychology or Feature Function Class?

Test Prep for GRE Psychology ships an update every 8 months, and Feature Function Class every 2 months. Most recently, Test Prep for GRE Psychology was updated on August 31, 2026 and Feature Function Class on September 11, 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.*