# Heart Chart vs Behind the Knife

The clearest difference is rating: Heart Chart at 4.5 against Behind the Knife's 4.0. Heart Chart also leads on update cadence (every 3 days vs every 5 weeks) and review sentiment (75% vs 58%). Behind the Knife's advantage is in-app purchases (none vs 1) and ratings volume (19 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. Heart Chart sells 1 in-app purchase, starting at $2.99 per year. Behind the Knife asks for nothing beyond the download.

Heart Chart holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Behind the Knife has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of Heart Chart's written reviews are positive against 58% of Behind the Knife's.

Heart Chart ships an update every 3 days, Behind the Knife every 5 weeks. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Heart Chart | Behind the Knife |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/heart-chart/id566700808/reviews)** | [4.0 (19 ratings)](https://appshunter.io/ios/app/behind-the-knife/id1672420049/reviews) |
| Number of ratings | 2 | **19** |
| Positive reviews | **75.0% of reviews** | 58.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 weeks |
| Monetization | Freemium | **Free** |
| Size | 11 MB | 168 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Bender Apps, LLC](https://appshunter.io/developer/1894916304) | [Behind the Knife](https://appshunter.io/developer/1672420051) |

## What reviewers say

### Heart Chart

[App page](https://appshunter.io/ios/app/heart-chart/id566700808)

This app allows medical professionals to visually document cardiac surgery cases. Users can draw graft configurations, add procedures, and generate PDF summaries for review or sharing. It's designed for surgeons, trainees, and educators to illustrate operative concepts.

**Highlights:** Draw CABG graft configurations, Add associated procedures, Generate professional PDF case summaries, Save cases with subscription, Simple step-by-step workflow, Designed for clinical education

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HeartChart Premium | $2.99 | per year |


### Behind the Knife

[App page](https://appshunter.io/ios/app/behind-the-knife/id1672420049)

This platform offers surgical education with high-yield topics and interviews with field leaders. It provides timely, relevant, and engaging content to help users succeed in their medical studies and careers.

**Highlights:** Surgical education platform, High-yield educational topics, Interviews with field leaders, Timely and relevant content, Engaging learning experience

**In-app purchases:** none


## Frequently asked questions

### Is Heart Chart free?

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

### Is Behind the Knife free?

Behind the Knife is free to download, with no in-app purchases.

### Which has better reviews, Heart Chart or Behind the Knife?

Heart Chart is rated higher. Heart Chart averages 4.5 out of 5 from 2 ratings, while Behind the Knife averages 4.0 from 19 ratings.

### Do Heart Chart or Behind the Knife have ads?

Neither Heart Chart nor Behind the Knife shows ads.

### Which is updated more often, Heart Chart or Behind the Knife?

Heart Chart ships an update every 3 days, and Behind the Knife every 5 weeks. Most recently, Heart Chart was updated on October 2, 2026 and Behind the Knife on October 7, 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.*