# Jカレンダー vs FirstSeed Calendar

The clearest difference is update cadence: FirstSeed Calendar at every 10 days against Jカレンダー's monthly. FirstSeed Calendar also leads on review sentiment (81% vs 66%) and ratings volume (330 vs 27). Jカレンダー's advantage is rating (4.9 vs 4.7) and iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Jカレンダー sells 1 one-off in-app purchase and FirstSeed Calendar sells 2 in-app purchases, starting at $2.99 per month. 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 4.7. That said, the two scores are not equally well evidenced: FirstSeed Calendar has 330 ratings behind it against 27, 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 81% of FirstSeed Calendar'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, FirstSeed Calendar every 10 days. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Jカレンダー | FirstSeed Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (27 ratings)](https://appshunter.io/ios/app/j/id765217858/reviews)** | [4.7 (330 ratings)](https://appshunter.io/ios/app/firstseed-calendar/id1321260278/reviews) |
| Number of ratings | 27 | **330** |
| Positive reviews | 65.5% of reviews | **80.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 61 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [PiyoLog Inc.](https://appshunter.io/developer/440099912) | [FirstSeed Inc](https://appshunter.io/developer/1321260277) |

## 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 |


### FirstSeed Calendar

[App page](https://appshunter.io/ios/app/firstseed-calendar/id1321260278)

A powerful scheduling app that manages both events and reminders. It offers innovative calendar views, interactive widgets for various iOS versions, and seamless syncing with Apple's Calendar and Reminders apps. An optional paid upgrade unlocks advanced features like natural language event processing and drag-and-drop functionality.

**Highlights:** Interactive and lock-screen widgets, Full-featured month, week, and list views, Event and reminder management, Natural language event processing (paid), Drag & drop event manipulation (paid), Apple Watch support, Syncs with Apple Calendar and Reminders

**Features:** Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Donation | $2.99 | per month |
| Pro Version | $9.99 | 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 FirstSeed Calendar free?

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

### Which has better reviews, Jカレンダー or FirstSeed 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 FirstSeed Calendar averages 4.7 from 330 ratings.

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

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

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

Jカレンダー ships an update monthly, and FirstSeed Calendar every 10 days. Most recently, Jカレンダー was updated on September 23, 2026 and FirstSeed Calendar on September 24, 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.*