# sigmoid neuron vs MCAT Prep

The clearest difference is in-app purchases: sigmoid neuron at none against MCAT Prep's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MCAT Prep sells 1 one-off in-app purchase. sigmoid neuron asks for nothing beyond the download.

## The numbers

| Metric | sigmoid neuron | MCAT Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 months |
| Size | 5 MB | 22 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [iAPPSSTUDIO](https://appshunter.io/developer/1830642259) |

## What reviewers say

### sigmoid neuron

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

**Features:** macOS Compatibility

**In-app purchases:** none


### MCAT Prep

[App page](https://appshunter.io/ios/app/mcat-prep-practice-tests/id6762444885)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Lifetime Access | $7.99 | one-time |


## Frequently asked questions

### Is sigmoid neuron free?

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

### Is MCAT Prep free?

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

### Do sigmoid neuron or MCAT Prep have ads?

Neither sigmoid neuron nor MCAT Prep 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.*