# AcidBase Calc vs Protocols High

The clearest difference is in-app purchases: AcidBase Calc at none against Protocols High's 1. AcidBase Calc also leads on ads (none vs shown) and iOS requirement (9.1 vs 13.0). On price and device support there is nothing between them.

Both are free to download. Protocols High sells 1 one-off in-app purchase. AcidBase Calc asks for nothing beyond the download.

## The numbers

| Metric | AcidBase Calc | Protocols High |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 6 months |
| Size | 4 MB | 47 MB |
| Requires iOS | **9.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Henry Ford Health System](https://appshunter.io/developer/393430586) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### AcidBase Calc

[App page](https://appshunter.io/ios/app/acidbase-calc/id1477845851)

**Features:** macOS Compatibility

**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 AcidBase Calc free?

AcidBase Calc is free to download, with no in-app purchases.

### Is Protocols High free?

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

### Do AcidBase Calc or Protocols High have ads?

Protocols High shows ads; AcidBase Calc does not.

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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.*