# Jカレンダー vs ただの電卓

The clearest difference is rating: Jカレンダー at 4.9 against ただの電卓's 4.3. Jカレンダー also leads on ratings volume (27 vs 3). ただの電卓's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and review sentiment there is nothing between them.

Both are free to download. Jカレンダー sells 1 one-off in-app purchase. ただの電卓 asks for nothing beyond the download.

Jカレンダー holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Jカレンダー has 27 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 66% of Jカレンダー's written reviews are positive against 70% of ただの電卓's, so the app with the better star average is not the one people write more warmly about.

Jカレンダー ships an update monthly, ただの電卓 fortnightly. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Jカレンダー | ただの電卓 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (27 ratings)](https://appshunter.io/ios/app/j/id765217858/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/id1573909569/reviews) |
| Number of ratings | **27** | 3 |
| Positive reviews | 65.5% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 14 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PiyoLog Inc.](https://appshunter.io/developer/440099912) | [HIROKI HORIGUCHI](https://appshunter.io/developer/1535451720) |

## 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 |


### ただの電卓

[App page](https://appshunter.io/ios/app/id1573909569)

**Features:** macOS Compatibility

**In-app purchases:** none


## 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 ただの電卓 free?

ただの電卓 is free to download, with no in-app purchases.

### Which has better reviews, Jカレンダー or ただの電卓?

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 ただの電卓 averages 4.3 from 3 ratings.

### Do Jカレンダー or ただの電卓 have ads?

Jカレンダー shows ads; ただの電卓 does not.

### Which is updated more often, Jカレンダー or ただの電卓?

Jカレンダー ships an update monthly, and ただの電卓 fortnightly. Most recently, Jカレンダー was updated on October 16, 2026 and ただの電卓 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.*