# Jカレンダー vs スマートタイマーAI

The clearest difference is in-app purchases: スマートタイマーAI at none against Jカレンダー's 1. スマートタイマーAI also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Jカレンダー sells 1 one-off in-app purchase. スマートタイマーAI asks for nothing beyond the download.

Jカレンダー ships an update monthly, スマートタイマーAI every 6 weeks. The most recent releases landed on October 1, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Jカレンダー | スマートタイマーAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (27 ratings)](https://appshunter.io/ios/app/j/id765217858/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 65.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 32 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PiyoLog Inc.](https://appshunter.io/developer/440099912) | [Yuya Fujita](https://appshunter.io/developer/1871516306) |

## 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 |


### スマートタイマーAI

[App page](https://appshunter.io/ios/app/ai/id6759734813)

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

**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 スマートタイマーAI free?

スマートタイマーAI is free to download, with no in-app purchases.

### Do Jカレンダー or スマートタイマーAI have ads?

Jカレンダー shows ads; スマートタイマーAI does not.

### Which is updated more often, Jカレンダー or スマートタイマーAI?

Jカレンダー ships an update monthly, and スマートタイマーAI every 6 weeks. Most recently, Jカレンダー was updated on October 1, 2026 and スマートタイマーAI on September 18, 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.*