# Ideal Calendar vs 1分の習慣

The clearest difference is in-app purchases: 1分の習慣 at none against Ideal Calendar's 1. Ideal Calendar's advantage is update cadence (every 8 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ideal Calendar sells 1 one-off in-app purchase. 1分の習慣 asks for nothing beyond the download.

Ideal Calendar ships an update every 8 days, 1分の習慣 monthly. The most recent releases landed on October 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Ideal Calendar | 1分の習慣 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Monthly |
| Size | 26 MB | 46 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Koki Nakanishi](https://appshunter.io/developer/1620502165) | [YUYA MASUDA](https://appshunter.io/developer/1840203331) |

## What reviewers say

### Ideal Calendar

[App page](https://appshunter.io/ios/app/ideal-calendar/id6758563243)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lifetime | $49.99 | one-time |


### 1分の習慣

[App page](https://appshunter.io/ios/app/1/id6758957376)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ideal Calendar free?

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

### Is 1分の習慣 free?

1分の習慣 is free to download, with no in-app purchases.

### Do Ideal Calendar or 1分の習慣 have ads?

Neither Ideal Calendar nor 1分の習慣 shows ads.

### Which is updated more often, Ideal Calendar or 1分の習慣?

Ideal Calendar ships an update every 8 days, and 1分の習慣 monthly. Most recently, Ideal Calendar was updated on October 28, 2026 and 1分の習慣 on October 12, 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.*