# スマートDOホーム vs KnifeKeep

The clearest difference is in-app purchases: スマートDOホーム at none against KnifeKeep's 2. スマートDOホーム also leads on ads (none vs shown) and iOS requirement (14.3 vs 17.0). On price, update cadence and device support 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ホーム asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | スマートDOホーム | KnifeKeep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Size | 9 MB | 7 MB |
| Requires iOS | **14.3** | 17.0 |
| Devices | **iPhone, iPod** | 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ホーム

[App page](https://appshunter.io/ios/app/do/id1568250468)

**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ホーム free?

スマートDOホーム 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ホーム or KnifeKeep have ads?

KnifeKeep shows ads; スマートDOホーム does not.

### Which is updated more often, スマートDOホーム or KnifeKeep?

スマートDOホーム ships an update every 3 months, and KnifeKeep every 3 months. Most recently, スマートDOホーム was updated on September 18, 2026 and KnifeKeep on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*