# Human Digestive System vs CloudLabs Solubility Constant

The clearest difference is price: CloudLabs Solubility Constant at Free against Human Digestive System's $0.99. CloudLabs Solubility Constant also leads on device support (3 vs 1) and iOS requirement (9.0 vs 12.0). On update cadence, ads and in-app purchases there is nothing between them.

CloudLabs Solubility Constant is free to download; Human Digestive System costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Human Digestive System ships an update every 18 months, CloudLabs Solubility Constant every 28 months. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Human Digestive System | CloudLabs Solubility Constant |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 18 months** | Every 28 months |
| Size | 401 MB | 72 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### Human Digestive System

[App page](https://appshunter.io/ios/app/human-digestive-system/id983535092)

**Features:** macOS Compatibility

**In-app purchases:** none


### CloudLabs Solubility Constant

[App page](https://appshunter.io/ios/app/cloudlabs-solubility-constant/id1596507800)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Human Digestive System free?

Human Digestive System costs $0.99, with no in-app purchases.

### Is CloudLabs Solubility Constant free?

CloudLabs Solubility Constant is free to download, with no in-app purchases.

### Do Human Digestive System or CloudLabs Solubility Constant have ads?

Neither Human Digestive System nor CloudLabs Solubility Constant shows ads.

### Which is updated more often, Human Digestive System or CloudLabs Solubility Constant?

Human Digestive System ships an update every 18 months, and CloudLabs Solubility Constant every 28 months. Most recently, Human Digestive System was updated on October 18, 2026 and CloudLabs Solubility Constant on October 9, 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.*