# 習慣カレンダー｜続けるを見える化 vs Stacky

The clearest difference is in-app purchases: 習慣カレンダー｜続けるを見える化 at none against Stacky's 1. Stacky's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stacky sells 1 one-off in-app purchase. 習慣カレンダー｜続けるを見える化 asks for nothing beyond the download.

習慣カレンダー｜続けるを見える化 ships an update every 3 months, Stacky every 3 weeks. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 習慣カレンダー｜続けるを見える化 | Stacky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 7 MB | 15 MB |
| Requires iOS | 18.4 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuki Kato](https://appshunter.io/developer/1494538555) | [Signet LLC](https://appshunter.io/developer/1880910401) |

## What reviewers say

### 習慣カレンダー｜続けるを見える化

[App page](https://appshunter.io/ios/app/id6746375629)

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

**In-app purchases:** none


### Stacky

[App page](https://appshunter.io/ios/app/stacky/id6759818275)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stacky プレミアム | $0.49 | one-time |


## Frequently asked questions

### Is 習慣カレンダー｜続けるを見える化 free?

習慣カレンダー｜続けるを見える化 is free to download, with no in-app purchases.

### Is Stacky free?

Stacky is free to download, with in-app purchases available.

### Do 習慣カレンダー｜続けるを見える化 or Stacky have ads?

Both 習慣カレンダー｜続けるを見える化 and Stacky show ads.

### Which is updated more often, 習慣カレンダー｜続けるを見える化 or Stacky?

習慣カレンダー｜続けるを見える化 ships an update every 3 months, and Stacky every 3 weeks. Most recently, 習慣カレンダー｜続けるを見える化 was updated on October 13, 2026 and Stacky on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*