# Learn Immune System vs CloudLabs Solubility

The clearest difference is price: CloudLabs Solubility at Free against Learn Immune System's $2.99. CloudLabs Solubility also leads on iOS requirement (9.0 vs 11.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

CloudLabs Solubility is free to download; Learn Immune System costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Immune System ships an update every 36 months, CloudLabs Solubility every 29 months. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Learn Immune System | CloudLabs Solubility |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 29 months** |
| Size | 16 MB | 77 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Nurten PIRLI](https://appshunter.io/developer/1495958705) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### Learn Immune System

[App page](https://appshunter.io/ios/app/learn-immune-system/id1502997625)

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

**In-app purchases:** none


### CloudLabs Solubility

[App page](https://appshunter.io/ios/app/cloudlabs-solubility/id1596359210)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Learn Immune System free?

Learn Immune System costs $2.99, with no in-app purchases.

### Is CloudLabs Solubility free?

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

### Do Learn Immune System or CloudLabs Solubility have ads?

Neither Learn Immune System nor CloudLabs Solubility shows ads.

### Which is updated more often, Learn Immune System or CloudLabs Solubility?

Learn Immune System ships an update every 36 months, and CloudLabs Solubility every 29 months. Most recently, Learn Immune System was updated on November 11, 2026 and CloudLabs Solubility on November 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.*