# NeuroAdapt ZONE vs Squirrel

The clearest difference is iOS requirement: NeuroAdapt ZONE at 15.1 against Squirrel's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NeuroAdapt ZONE ships an update every 6 weeks, Squirrel monthly. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NeuroAdapt ZONE | Squirrel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Size | 37 MB | 12 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [W David O'Byrne](https://appshunter.io/developer/620112271) | [Jaganathan Konar](https://appshunter.io/developer/1896388373) |

## What reviewers say

### NeuroAdapt ZONE

[App page](https://appshunter.io/ios/app/neuroadapt-zone/id6761205914)

**In-app purchases:** none


### Squirrel

[App page](https://appshunter.io/ios/app/squirrel-adhd-second-brain/id6770824956)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NeuroAdapt ZONE free?

NeuroAdapt ZONE is free to download, with no in-app purchases.

### Is Squirrel free?

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

### Do NeuroAdapt ZONE or Squirrel have ads?

Neither NeuroAdapt ZONE nor Squirrel shows ads.

### Which is updated more often, NeuroAdapt ZONE or Squirrel?

NeuroAdapt ZONE ships an update every 6 weeks, and Squirrel monthly. Most recently, NeuroAdapt ZONE was updated on October 1, 2026 and Squirrel on October 14, 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.*