# コンタクト交換リマインダー vs Otonote

The clearest difference is in-app purchases: コンタクト交換リマインダー at none against Otonote's 3. Otonote's advantage is update cadence (every 5 days vs every 35 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Otonote sells 3 in-app purchases, starting at $2.99 per month. コンタクト交換リマインダー asks for nothing beyond the download.

コンタクト交換リマインダー ships an update every 35 months, Otonote every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | コンタクト交換リマインダー | Otonote |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 35 months | **Every 5 days** |
| Size | 36 MB | 53 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Tomoki Yabuuchi](https://appshunter.io/developer/1367124699) | [Kensuke Takasugi](https://appshunter.io/developer/1812601387) |

## What reviewers say

### コンタクト交換リマインダー

[App page](https://appshunter.io/ios/app/id1434428236)

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

**In-app purchases:** none


### Otonote

[App page](https://appshunter.io/ios/app/otonote/id6757008660)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $2.99 | per month |
| 年額プレミアムプラン | $29.99 | per year |
| プレミアム（買い切り） | $59.99 | one-time |


## Frequently asked questions

### Is コンタクト交換リマインダー free?

コンタクト交換リマインダー is free to download, with no in-app purchases.

### Is Otonote free?

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

### Do コンタクト交換リマインダー or Otonote have ads?

Both コンタクト交換リマインダー and Otonote show ads.

### Which is updated more often, コンタクト交換リマインダー or Otonote?

コンタクト交換リマインダー ships an update every 35 months, and Otonote every 5 days. Most recently, コンタクト交換リマインダー was updated on October 24, 2026 and Otonote on October 25, 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.*