# Jカレンダー vs Otona Calendar

The clearest difference is rating: Jカレンダー at 4.9 against Otona Calendar's 4.1. Jカレンダー also leads on review sentiment (66% vs 42%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Jカレンダー sells 1 one-off in-app purchase and Otona Calendar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Jカレンダー holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 27 and 10 respectively. Written reviews point the same way: 66% of Jカレンダー's written reviews are positive against 42% of Otona Calendar's.

Jカレンダー ships an update monthly, Otona Calendar fortnightly. Both last shipped on November 11, 2026.

## The numbers

| Metric | Jカレンダー | Otona Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (27 ratings)](https://appshunter.io/ios/app/j/id765217858/reviews)** | [4.1 (10 ratings)](https://appshunter.io/ios/app/otona-calendar-simple-planner/id987143083/reviews) |
| Number of ratings | **27** | 10 |
| Positive reviews | **65.5% of reviews** | 41.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 49 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PiyoLog Inc.](https://appshunter.io/developer/440099912) | [Masaki Hirano](https://appshunter.io/developer/870094068) |

## What reviewers say

### Jカレンダー

[App page](https://appshunter.io/ios/app/j/id765217858)

This app offers a visually customizable calendar with Japanese holidays, lunar phases, and traditional Japanese calendars. Add photos and notes to your events, and enjoy daily quotes. It syncs with your device's calendar for seamless scheduling.

**Highlights:** Japanese holidays and traditional calendars (Rokuyo, lunar phases), Photo and note customization for events, Daily quotes and sayings, Syncs with device calendar, Customizable visual themes, Recurring event scheduling

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $2.99 | one-time |


### Otona Calendar

[App page](https://appshunter.io/ios/app/otona-calendar-simple-planner/id987143083)

This straightforward scheduling app syncs with your existing iOS calendars, including iCloud and Google. It offers event templates, search functionality, and notifications without requiring complex setup. An optional one-time purchase removes advertisements.

**Highlights:** Event templates, Move and copy events, Find free time, Search events, Create custom calendars, Event notifications, Passcode lock

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Jカレンダー free?

Jカレンダー is free to download, with in-app purchases available.

### Is Otona Calendar free?

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

### Which has better reviews, Jカレンダー or Otona Calendar?

Jカレンダー is rated higher. Jカレンダー averages 4.9 out of 5 from 27 ratings, while Otona Calendar averages 4.1 from 10 ratings.

### Do Jカレンダー or Otona Calendar have ads?

Both Jカレンダー and Otona Calendar show ads.

### Which is updated more often, Jカレンダー or Otona Calendar?

Jカレンダー ships an update monthly, and Otona Calendar fortnightly. Most recently, Jカレンダー was updated on November 11, 2026 and Otona Calendar on November 11, 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.*