# Second Brain Note vs MonsterMailbox

The clearest difference is in-app purchases: MonsterMailbox at none against Second Brain Note's 1. MonsterMailbox also leads on iOS requirement (13.0 vs 26.4). Second Brain Note's advantage is chart position (#120 vs unranked). On price, ads and device support there is nothing between them.

Both are free to download. Second Brain Note sells 1 in-app purchase, starting at $4.99 per month. MonsterMailbox asks for nothing beyond the download.

## The numbers

| Metric | Second Brain Note | MonsterMailbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/second-brain-note/id6753705529/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Subscription | — |
| Best chart rank | **#120** | — |
| Size | 12 MB | 20 MB |
| Requires iOS | 26.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Chandler Mosteller](https://appshunter.io/developer/1671357283) | [All In Networks](https://appshunter.io/developer/459284427) |

## What reviewers say

### Second Brain Note

[App page](https://appshunter.io/ios/app/second-brain-note/id6753705529)

**Currently charting:** #120 Top Grossing · Developer Tools (US App Store)

Organize your thoughts and tasks with a structured knowledge workspace. Capture ideas, visualize connections, and plan your days effectively. Streamline information collection and turn it into actionable insights for work, school, or personal life.

**Highlights:** Hierarchical idea capture with Brain Tree, Visual thinking with Mind Map, Flexible page-based writing in Notebooks, Goal tracking with Milestones and tasks, Daily planning with Calendar time boxing, Cost tracking for expenses, Personal knowledge library creation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro + | $4.99 | per month |


### MonsterMailbox

[App page](https://appshunter.io/ios/app/monstermailbox/id6772627113)

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

**In-app purchases:** none


## Frequently asked questions

### Is Second Brain Note free?

Second Brain Note is free to download, with in-app purchases available.

### Is MonsterMailbox free?

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

### Do Second Brain Note or MonsterMailbox have ads?

Neither Second Brain Note nor MonsterMailbox 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.*