# 体液ナビ vs 心電図ドリル

体液ナビ and 心電図ドリル are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 体液ナビ sells 1 one-off in-app purchase and 心電図ドリル sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

体液ナビ ships an update every 6 weeks, 心電図ドリル monthly. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 体液ナビ | 心電図ドリル |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Size | 7 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [Takahiro Ito](https://appshunter.io/developer/6787806782) | [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282) |

## What reviewers say

### 体液ナビ

[App page](https://appshunter.io/ios/app/id6799933268)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フル版（全ユニット解放） | $5.99 | one-time |


### 心電図ドリル

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

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shindenzu Pro | $9.99 | one-time |


## Frequently asked questions

### Is 体液ナビ free?

体液ナビ is free to download, with in-app purchases available.

### Is 心電図ドリル free?

心電図ドリル is free to download, with in-app purchases available.

### Do 体液ナビ or 心電図ドリル have ads?

Neither 体液ナビ nor 心電図ドリル shows ads.

### Which is updated more often, 体液ナビ or 心電図ドリル?

体液ナビ ships an update every 6 weeks, and 心電図ドリル monthly. Most recently, 体液ナビ was updated on October 31, 2026 and 心電図ドリル 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.*