# 予定をお知らせ vs Chime Machine

The clearest difference is in-app purchases: 予定をお知らせ at none against Chime Machine's 2. 予定をお知らせ also leads on iOS requirement (15.6 vs 18.0). Chime Machine's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Chime Machine sells 2 in-app purchases, starting at $2.99 per month. 予定をお知らせ asks for nothing beyond the download.

予定をお知らせ ships an update every 9 days, Chime Machine every 10 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 予定をお知らせ | Chime Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/chime-machine/id6748895957/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 10 days |
| Size | 66 MB | 91 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shintaro Nishii](https://appshunter.io/developer/1595084568) | [moonxseed](https://appshunter.io/developer/310554167) |

## What reviewers say

### 予定をお知らせ

[App page](https://appshunter.io/ios/app/id1597579619)

**Features:** Vision Pro support

**In-app purchases:** none


### Chime Machine

[App page](https://appshunter.io/ios/app/chime-machine/id6748895957)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro subscription | $2.99 | per month |
| Yearly Pro subscription | $29.99 | per year |


## Frequently asked questions

### Is 予定をお知らせ free?

予定をお知らせ is free to download, with no in-app purchases.

### Is Chime Machine free?

Chime Machine is free to download, with in-app purchases available.

### Do 予定をお知らせ or Chime Machine have ads?

予定をお知らせ shows ads; Chime Machine does not.

### Which is updated more often, 予定をお知らせ or Chime Machine?

予定をお知らせ ships an update every 9 days, and Chime Machine every 10 days. Most recently, 予定をお知らせ was updated on October 25, 2026 and Chime Machine on October 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.*