# Interactive Photosynthesis vs Human Nervous system

Interactive Photosynthesis and Human Nervous system are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Interactive Photosynthesis ships an update every 25 months, Human Nervous system every 37 months. Both last shipped on September 10, 2026.

## The numbers

| Metric | Interactive Photosynthesis | Human Nervous system |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 25 months** | Every 37 months |
| Size | 183 MB | 131 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPad, Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## What reviewers say

### Interactive Photosynthesis

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Human Nervous system

[App page](https://appshunter.io/ios/app/human-nervous-system/id1527531583)

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

**In-app purchases:** none


## Frequently asked questions

### Is Interactive Photosynthesis free?

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

### Is Human Nervous system free?

Human Nervous system costs $1.99, with no in-app purchases.

### Do Interactive Photosynthesis or Human Nervous system have ads?

Neither Interactive Photosynthesis nor Human Nervous system shows ads.

### Which is updated more often, Interactive Photosynthesis or Human Nervous system?

Interactive Photosynthesis ships an update every 25 months, and Human Nervous system every 37 months. Most recently, Interactive Photosynthesis was updated on September 10, 2026 and Human Nervous system 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.*