# Aitemasu mobile vs Chouseisan

The clearest difference is ads: Aitemasu mobile at none against Chouseisan's shown. Aitemasu mobile also leads on review sentiment (84% vs 75%) and iOS requirement (13.0 vs 15.6). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Aitemasu mobile ships an update every 2 weeks, Chouseisan fortnightly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Aitemasu mobile | Chouseisan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (43 ratings)](https://appshunter.io/ios/app/chouseisan/id6448971739/reviews)** |
| Number of ratings | — | **43** |
| Positive reviews | **84.2% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Ad-supported | Ad-supported |
| Size | 46 MB | 97 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHINJI YAMAGUCHI](https://appshunter.io/developer/1439282350) | [Mixtend Inc.](https://appshunter.io/developer/1687241996) |

## What reviewers say

### Aitemasu mobile

[App page](https://appshunter.io/ios/app/aitemasu-mobile/id1439282801)

Easily schedule appointments and manage group events by connecting to your Google Calendar. Share availability, prevent double-bookings, and coordinate with others, even those without the app. Automatically adds confirmed events to your calendar.

**Highlights:** Connects with Google Calendar, Share availability links, Prevent double-bookings, Manage multiple participants, Supports timezones, Automatic Zoom/Google Meet link creation

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

**In-app purchases:** none


### Chouseisan

[App page](https://appshunter.io/ios/app/chouseisan/id6448971739)

This free scheduling app simplifies organizing events for both personal and professional use. Easily create event pages and share URLs to coordinate with guests, making it a top choice for smooth itinerary planning.

**Highlights:** Streamlines event scheduling, Organizes private and business events, Easy event page creation, Shareable event URLs, Large user base in Japan

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

**In-app purchases:** none


## Frequently asked questions

### Is Aitemasu mobile free?

Aitemasu mobile is free to download, with no in-app purchases.

### Is Chouseisan free?

Chouseisan is free to download, with no in-app purchases.

### Do Aitemasu mobile or Chouseisan have ads?

Chouseisan shows ads; Aitemasu mobile does not.

### Which is updated more often, Aitemasu mobile or Chouseisan?

Aitemasu mobile ships an update every 2 weeks, and Chouseisan fortnightly. Most recently, Aitemasu mobile was updated on October 24, 2026 and Chouseisan on October 27, 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.*