# Medical Reference Guides vs One Heart App

The clearest difference is in-app purchases: One Heart App at none against Medical Reference Guides's 1. One Heart App also leads on ads (none vs shown) and update cadence (every 3 months vs every 9 months). Medical Reference Guides's advantage is iOS requirement (12.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Medical Reference Guides sells 1 one-off in-app purchase. One Heart App asks for nothing beyond the download.

Medical Reference Guides ships an update every 9 months, One Heart App every 3 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Medical Reference Guides | One Heart App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 3 months** |
| Size | 110 MB | 40 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Faisal Akhtar](https://appshunter.io/developer/1783643697) | [One Heart Health](https://appshunter.io/developer/1782940422) |

## What reviewers say

### Medical Reference Guides

[App page](https://appshunter.io/ios/app/medical-reference-guides/id6479542497)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English | $0.99 | one-time |


### One Heart App

[App page](https://appshunter.io/ios/app/one-heart-app/id6738925613)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Medical Reference Guides free?

Medical Reference Guides is free to download, with in-app purchases available.

### Is One Heart App free?

One Heart App is free to download, with no in-app purchases.

### Do Medical Reference Guides or One Heart App have ads?

Medical Reference Guides shows ads; One Heart App does not.

### Which is updated more often, Medical Reference Guides or One Heart App?

Medical Reference Guides ships an update every 9 months, and One Heart App every 3 months. Most recently, Medical Reference Guides was updated on October 27, 2026 and One Heart App 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.*