# QUATRO vs chaKra 公式アプリ

QUATRO and chaKra 公式アプリ are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QUATRO ships an update every 30 months, chaKra 公式アプリ every 40 months. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | QUATRO | chaKra 公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 30 months** | Every 40 months |
| Size | 3 MB | 15 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shingo kamei](https://appshunter.io/developer/1256845824) | [MIKA OSONOE](https://appshunter.io/developer/1436814575) |

## What reviewers say

### QUATRO

[App page](https://appshunter.io/ios/app/quatro/id1017581026)

**In-app purchases:** none


### chaKra 公式アプリ

[App page](https://appshunter.io/ios/app/chakra/id1436814576)

**In-app purchases:** none


## Frequently asked questions

### Is QUATRO free?

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

### Is chaKra 公式アプリ free?

chaKra 公式アプリ is free to download, with no in-app purchases.

### Do QUATRO or chaKra 公式アプリ have ads?

Neither QUATRO nor chaKra 公式アプリ shows ads.

### Which is updated more often, QUATRO or chaKra 公式アプリ?

QUATRO ships an update every 30 months, and chaKra 公式アプリ every 40 months. Most recently, QUATRO was updated on October 19, 2026 and chaKra 公式アプリ on October 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.*