# NeuroDevApp vs Cairn Journal

The clearest difference is in-app purchases: NeuroDevApp at none against Cairn Journal's 4. NeuroDevApp also leads on iOS requirement (13.0 vs 26.0). Cairn Journal's advantage is update cadence (every 5 weeks vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. Cairn Journal sells 4 in-app purchases, starting at $3.99 per month. NeuroDevApp asks for nothing beyond the download.

NeuroDevApp ships an update every 8 months, Cairn Journal every 5 weeks. The most recent releases landed on October 1, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | NeuroDevApp | Cairn Journal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Size | 98 MB | 22 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [BRAINBIT INC.](https://appshunter.io/developer/1510548622) | [INFO WEB s.r.o.](https://appshunter.io/developer/1114065010) |

## What reviewers say

### NeuroDevApp

[App page](https://appshunter.io/ios/app/neurodevapp/id6496372019)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cairn Journal

[App page](https://appshunter.io/ios/app/cairn-journal/id6761309948)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn Journal Core | $3.99 | per month |
| Cairn Journal Pro | $6.99 | per month |
| Cairn Journal Core (Annual) | $29.99 | per year |
| Cairn Journal Pro (Annual) | $59.99 | per year |


## Frequently asked questions

### Is NeuroDevApp free?

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

### Is Cairn Journal free?

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

### Do NeuroDevApp or Cairn Journal have ads?

Neither NeuroDevApp nor Cairn Journal shows ads.

### Which is updated more often, NeuroDevApp or Cairn Journal?

NeuroDevApp ships an update every 8 months, and Cairn Journal every 5 weeks. Most recently, NeuroDevApp was updated on October 1, 2026 and Cairn Journal on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*