# Geometry Quick Reference vs CiNii Research, KAKEN, IRDB

The clearest difference is price: CiNii Research, KAKEN, IRDB at Free against Geometry Quick Reference's $0.99. CiNii Research, KAKEN, IRDB also leads on update cadence (every 3 months vs every 37 months). Geometry Quick Reference's advantage is ads (none vs shown) and iOS requirement (12.0 vs 26.0). On in-app purchases and device support there is nothing between them.

CiNii Research, KAKEN, IRDB is free to download; Geometry Quick Reference costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Geometry Quick Reference ships an update every 37 months, CiNii Research, KAKEN, IRDB every 3 months. The most recent releases landed on May 16, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Geometry Quick Reference | CiNii Research, KAKEN, IRDB |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 37 months | **Every 3 months** |
| Monetization | — | Ad-supported |
| Size | 7 MB | 11 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) |

## What reviewers say

### Geometry Quick Reference

[App page](https://appshunter.io/ios/app/geometry-quick-reference/id706066085)

**Features:** macOS Compatibility

**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 Geometry Quick Reference free?

Geometry Quick Reference costs $0.99, 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 Geometry Quick Reference or CiNii Research, KAKEN, IRDB have ads?

CiNii Research, KAKEN, IRDB shows ads; Geometry Quick Reference does not.

### Which is updated more often, Geometry Quick Reference or CiNii Research, KAKEN, IRDB?

Geometry Quick Reference ships an update every 37 months, and CiNii Research, KAKEN, IRDB every 3 months. Most recently, Geometry Quick Reference was updated on May 16, 2026 and CiNii Research, KAKEN, IRDB on September 6, 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.*