# sigmoid neuron vs AI

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

Both are free to download. AI sells 2 in-app purchases, starting at $9.99 per month. sigmoid neuron asks for nothing beyond the download.

## The numbers

| Metric | sigmoid neuron | AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 5 MB | 42 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Rajesh Kumar Srivastava](https://appshunter.io/developer/6813125347) |

## What reviewers say

### sigmoid neuron

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

**Features:** macOS Compatibility

**In-app purchases:** none


### AI

[App page](https://appshunter.io/ios/app/ai-ml-companion/id6813125345)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $69.99 | per year |


## Frequently asked questions

### Is sigmoid neuron free?

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

### Is AI free?

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

### Do sigmoid neuron or AI have ads?

Neither sigmoid neuron nor AI shows ads.

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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.*