# スマートDOサポート vs KnifeKeep

The clearest difference is in-app purchases: スマートDOサポート at none against KnifeKeep's 2. スマートDOサポート also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. KnifeKeep sells 2 in-app purchases, starting at $0.99 per 7 days. スマートDOサポート asks for nothing beyond the download.

スマートDOサポート ships an update every 2 months, KnifeKeep every 3 months. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | スマートDOサポート | KnifeKeep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 51 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [&Do Holdings Co., Ltd.](https://appshunter.io/developer/1149829368) | [Ryo Tsudukihashi](https://appshunter.io/developer/1320583602) |

## What reviewers say

### スマートDOサポート

[App page](https://appshunter.io/ios/app/do/id1536508834)

**Features:** macOS Compatibility

**In-app purchases:** none


### KnifeKeep

[App page](https://appshunter.io/ios/app/knifekeep-blade-care/id6782555676)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Weekly) | $0.99 | per 7 days |
| Premium (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is スマートDOサポート free?

スマートDOサポート is free to download, with no in-app purchases.

### Is KnifeKeep free?

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

### Do スマートDOサポート or KnifeKeep have ads?

KnifeKeep shows ads; スマートDOサポート does not.

### Which is updated more often, スマートDOサポート or KnifeKeep?

スマートDOサポート ships an update every 2 months, and KnifeKeep every 3 months. Most recently, スマートDOサポート was updated on October 11, 2026 and KnifeKeep on October 8, 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.*