# 心電図ドリル vs 心電図Navi

The clearest difference is in-app purchases: 心電図ドリル at none against 心電図Navi's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 心電図Navi sells 1 one-off in-app purchase. 心電図ドリル asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. Both last shipped on October 19, 2026.

## The numbers

| Metric | 心電図ドリル | 心電図Navi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 5 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282) | [Takahiro Ito](https://appshunter.io/developer/6787806782) |

## What reviewers say

### 心電図ドリル

[App page](https://appshunter.io/ios/app/12/id6801799404)

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

**In-app purchases:** none


### 心電図Navi

[App page](https://appshunter.io/ios/app/navi/id6802314816)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フル版（全波形解放） | $5.99 | one-time |


## Frequently asked questions

### Is 心電図ドリル free?

心電図ドリル is free to download, with no in-app purchases.

### Is 心電図Navi free?

心電図Navi is free to download, with in-app purchases available.

### Do 心電図ドリル or 心電図Navi have ads?

Neither 心電図ドリル nor 心電図Navi shows ads.

### Which is updated more often, 心電図ドリル or 心電図Navi?

心電図ドリル ships an update monthly, and 心電図Navi monthly. Most recently, 心電図ドリル was updated on October 19, 2026 and 心電図Navi on October 19, 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.*