# sigmoid neuron vs Q

The clearest difference is in-app purchases: sigmoid neuron at none against Q's 3. sigmoid neuron also leads on iOS requirement (17.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Q sells 3 in-app purchases, starting at $9.99 per month. sigmoid neuron asks for nothing beyond the download.

## The numbers

| Metric | sigmoid neuron | Q |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 5 MB | 8 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [EUNMIN PARK](https://appshunter.io/developer/1549813078) |

## What reviewers say

### sigmoid neuron

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Q

[App page](https://appshunter.io/ios/app/q-alpha/id6760243993)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Q-Alpha Pro (Monthly) | $9.99 | per month |
| Q-Alpha Pro (Yearly) | $59.99 | per year |
| Q-Alpha Learner Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is sigmoid neuron free?

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

### Is Q free?

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

### Do sigmoid neuron or Q have ads?

Neither sigmoid neuron nor Q 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.*