# ECG Notes vs InVivo

The clearest difference is ads: InVivo at none against ECG Notes's shown. InVivo also leads on update cadence (fortnightly vs every 3 months). ECG Notes's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. ECG Notes sells 1 one-off in-app purchase and InVivo sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

ECG Notes ships an update every 3 months, InVivo fortnightly. The most recent releases landed on October 21, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ECG Notes | InVivo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/ecg-notes-quick-look-up-ref/id1146393355/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 109 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [Mercury Synergy s.r.o.](https://appshunter.io/developer/1281950391) |

## What reviewers say

### ECG Notes

[App page](https://appshunter.io/ios/app/ecg-notes-quick-look-up-ref/id1146393355)

This pocket guide offers a quick reference for ECG interpretation and management, covering basics, 12-lead ECGs, ACLS, CPR, and emergency medications. It includes over 100 ECG strips and practice questions, with content updated to the latest guidelines. No internet connection is needed after initial download.

**Highlights:** 125 ECG rhythm strips, Comprehensive coverage: basics, ECG, ACLS, PALS, meds, CPR, CPR algorithms in tabular format, Test Yourself ECG strips with real-life arrhythmias, Clinical Tips and PALS coverage, SmartSearch technology for quick look-up, Offline content access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ECG Notes-Ed.4 | $34.99 | one-time |


### InVivo

[App page](https://appshunter.io/ios/app/invivo-ecg-ekg-course/id1659081673)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Auto-Renew Premium | $6.99 | per month |
| 3-Month Auto-Renew Premium | $9.99 | per 3 months |
| Annual Auto-Renew Premium | $19.99 | per year |


## Frequently asked questions

### Is ECG Notes free?

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

### Is InVivo free?

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

### Do ECG Notes or InVivo have ads?

ECG Notes shows ads; InVivo does not.

### Which is updated more often, ECG Notes or InVivo?

ECG Notes ships an update every 3 months, and InVivo fortnightly. Most recently, ECG Notes was updated on October 21, 2026 and InVivo on October 27, 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.*