# sigmoid neuron vs Physics AI Solver

The clearest difference is in-app purchases: sigmoid neuron at none against Physics AI Solver's 2. sigmoid neuron also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. Physics AI Solver sells 2 in-app purchases, starting at $6.99 per 7 days. sigmoid neuron asks for nothing beyond the download.

## The numbers

| Metric | sigmoid neuron | Physics AI Solver |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Size | 5 MB | 54 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [ProductiveTap](https://appshunter.io/developer/430553438) |

## What reviewers say

### sigmoid neuron

[App page](https://appshunter.io/ios/app/sigmoid-neuron/id6740157799)

**Features:** macOS Compatibility

**In-app purchases:** none


### Physics AI Solver

[App page](https://appshunter.io/ios/app/physics-ai-solver-physics-ace/id6760992259)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $6.99 | per 7 days |
| Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is sigmoid neuron free?

sigmoid neuron is free to download, with no in-app purchases.

### Is Physics AI Solver free?

Physics AI Solver is free to download, with in-app purchases available.

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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.*