# Police Tutorial vs CiNii Research, KAKEN, IRDB

The clearest difference is review sentiment: Police Tutorial at 50% against CiNii Research, KAKEN, IRDB's 0%. Police Tutorial also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). On price, 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.

Police Tutorial ships an update monthly, CiNii Research, KAKEN, IRDB every 3 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Police Tutorial | CiNii Research, KAKEN, IRDB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (7 ratings)](https://appshunter.io/ios/app/police-tutorial/id637137861/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 46 MB | 11 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Police Tutorial Service](https://appshunter.io/developer/637137864) | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) |

## What reviewers say

### Police Tutorial

[App page](https://appshunter.io/ios/app/police-tutorial/id637137861)

Access police course materials on your iOS device. Download content for offline review to help you become a police officer or advance your career in New York State.

**Highlights:** Downloadable course materials, Offline access, Police career advancement, New York State specific content, iOS device compatibility

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

**In-app purchases:** none


### 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 Police Tutorial free?

Police Tutorial is free to download, with no in-app purchases.

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

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

### Do Police Tutorial or CiNii Research, KAKEN, IRDB have ads?

CiNii Research, KAKEN, IRDB shows ads; Police Tutorial does not.

### Which is updated more often, Police Tutorial or CiNii Research, KAKEN, IRDB?

Police Tutorial ships an update monthly, and CiNii Research, KAKEN, IRDB every 3 months. Most recently, Police Tutorial was updated on October 24, 2026 and CiNii Research, KAKEN, IRDB on October 13, 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.*