# GRE Practice Test Prep vs CiNii Research, KAKEN, IRDB

The clearest difference is in-app purchases: CiNii Research, KAKEN, IRDB at none against GRE Practice Test Prep's 1. GRE Practice Test Prep's advantage is ads (none vs shown) and iOS requirement (9.0 vs 26.0). On price and device support there is nothing between them.

Both are free to download. GRE Practice Test Prep sells 1 one-off in-app purchase. CiNii Research, KAKEN, IRDB asks for nothing beyond the download.

## The numbers

| Metric | GRE Practice Test Prep | CiNii Research, KAKEN, IRDB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/gre-practice-test-prep/id1460133033/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 6 MB | 11 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [MOON MOUNTAIN INC](https://appshunter.io/developer/1555760990) | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) |

## What reviewers say

### GRE Practice Test Prep

[App page](https://appshunter.io/ios/app/gre-practice-test-prep/id1460133033)

Prepare for your Graduate Record Examination with a comprehensive study guide and practice tests. This app utilizes a proprietary learning strategy based on cognitive psychology to enhance memorization and understanding, offering over 1000 questions to help you succeed.

**Highlights:** Over 1000 practice questions, Proprietary Effective Learning Strategy (ELS™), Chunking technique for memorization, Daily free questions, Pass or It's Free Guarantee

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GRE Practice Test Premium | $4.99 | one-time |


### CiNii Research, KAKEN, IRDB

[App page](https://appshunter.io/ios/app/cinii-research-kaken-irdb/id1618150440)

This app provides a comprehensive search interface for academic literature, research data, and project information. It aggregates data from numerous databases, offering a free and unified platform for researchers and librarians. Access a vast collection of scholarly materials and research activities.

**Highlights:** Cross-search academic literature, Access research data, Find project information, Utilizes CiNii APIs, Free to use, Incorporates multiple databases

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GRE Practice Test Prep free?

GRE Practice Test Prep is free to download, with in-app purchases available.

### Is CiNii Research, KAKEN, IRDB free?

CiNii Research, KAKEN, IRDB is free to download, with no in-app purchases.

### Do GRE Practice Test Prep or CiNii Research, KAKEN, IRDB have ads?

CiNii Research, KAKEN, IRDB shows ads; GRE Practice Test Prep does not.

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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.*