# HEART KNIFE

> HEART KNIFE (iPhone/iPad app by STEELSTYLE K.K..)

- Source: https://appshunter.io/ios/app/heart-knife/id1547579858 (this page in markdown: same URL + `.md`)
- Developer: [STEELSTYLE K.K.](https://appshunter.io/developer/1547579860)
- Category: Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 25 MB
- Languages: Japanese
- Released: 2021-01-10
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/heart-knife/id1547579858/reviews.md

## What is HEART KNIFE?

This is an application for playing messages of HEART KNIFE's kitchen knife.
If you hold your smartphone's camera over the sound waveform engraved on the knife, you can play back the recorded sound.

You can listen to messages from the sender with one smartphone at any time any where, so you can always feel close to your important one.
You can also create an original kitchen knife with a message like the one you received, so easily send the joy you felt when you received a kitchen knife to the person who is important to you.


## Version history (last 5 releases)

### 1.1.9 — 2024-09-10

bug fixed

### 1.1.6 — 2021-07-24

We have made some minor improvements.

### 1.1.5 — 2021-06-21

We have made some minor improvements.

### 1.1.4 — 2021-06-13

We have made it multilingual.

### 1.1.2 — 2021-05-01

Minor functional improvements have been made.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*