# Constellation vs Project Notebook +

The clearest difference is in-app purchases: Project Notebook + at none against Constellation's 1. Constellation's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Constellation sells 1 one-off in-app purchase. Project Notebook + asks for nothing beyond the download.

Constellation ships an update every 2 months, Project Notebook + monthly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Constellation | Project Notebook + |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 19 MB | 8 MB |
| Requires iOS | 18.0 | 18 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Drobinin Limited](https://appshunter.io/developer/1713029153) | [Yan Kin LEUNG](https://appshunter.io/developer/320172517) |

## What reviewers say

### Constellation

[App page](https://appshunter.io/ios/app/constellation-mind-atlas/id6756132557)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Personal Wiki Pro | $39.99 | one-time |


### Project Notebook +

[App page](https://appshunter.io/ios/app/project-notebook-plus/id6783396153)

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

**In-app purchases:** none


## Frequently asked questions

### Is Constellation free?

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

### Is Project Notebook + free?

Project Notebook + is free to download, with no in-app purchases.

### Do Constellation or Project Notebook + have ads?

Neither Constellation nor Project Notebook + shows ads.

### Which is updated more often, Constellation or Project Notebook +?

Constellation ships an update every 2 months, and Project Notebook + monthly. Most recently, Constellation was updated on October 28, 2026 and Project Notebook + on October 31, 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.*