# ObCalc vs Protocols High

The clearest difference is price: Protocols High at Free against ObCalc's $6.99. Protocols High also leads on iOS requirement (13.0 vs 26.0). ObCalc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Protocols High is free to download; ObCalc costs $6.99 up front. Protocols High sells 1 one-off in-app purchase. ObCalc asks for nothing beyond the download.

ObCalc ships an update every 5 weeks, Protocols High every 6 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ObCalc | Protocols High |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Best chart rank | **#107** | — |
| Size | 3 MB | 47 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Code Nine Labs LLC](https://appshunter.io/developer/983427275) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### ObCalc

[App page](https://appshunter.io/ios/app/obcalc/id983427276)

**Currently charting:** #107 Top Paid · Medical (US App Store)

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

**In-app purchases:** none


### Protocols High

[App page](https://appshunter.io/ios/app/protocols-high-risk-pregnancy/id6698860159)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protocols High-Risk Pregnancy | $99.99 | one-time |


## Frequently asked questions

### Is ObCalc free?

ObCalc costs $6.99, with no in-app purchases.

### Is Protocols High free?

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

### Do ObCalc or Protocols High have ads?

Protocols High shows ads; ObCalc does not.

### Which is updated more often, ObCalc or Protocols High?

ObCalc ships an update every 5 weeks, and Protocols High every 6 months. Most recently, ObCalc was updated on October 29, 2026 and Protocols High 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.*