# Learn Nervous System vs Interactive Photosynthesis

The clearest difference is price: Interactive Photosynthesis at $1.99 against Learn Nervous System's $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Learn Nervous System costs $2.99 and Interactive Photosynthesis $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Nervous System ships an update every 36 months, Interactive Photosynthesis every 25 months. The most recent releases landed on August 13, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Learn Nervous System | Interactive Photosynthesis |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 25 months** |
| Size | 16 MB | 183 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad, Apple TV |
| Age rating | 12+ | 4+ |
| Developer | [Nurten PIRLI](https://appshunter.io/developer/1495958705) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Learn Nervous System

[App page](https://appshunter.io/ios/app/learn-nervous-system/id1502220966)

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

**In-app purchases:** none


### Interactive Photosynthesis

[App page](https://appshunter.io/ios/app/interactive-photosynthesis/id1511209024)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Learn Nervous System free?

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

### Is Interactive Photosynthesis free?

Interactive Photosynthesis costs $1.99, with no in-app purchases.

### Do Learn Nervous System or Interactive Photosynthesis have ads?

Neither Learn Nervous System nor Interactive Photosynthesis shows ads.

### Which is updated more often, Learn Nervous System or Interactive Photosynthesis?

Learn Nervous System ships an update every 36 months, and Interactive Photosynthesis every 25 months. Most recently, Learn Nervous System was updated on August 13, 2026 and Interactive Photosynthesis on September 10, 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.*