# Monolithos Core vs Second Brain

The clearest difference is update cadence: Second Brain at weekly against Monolithos Core's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Monolithos Core sells 8 in-app purchases, starting at $39.99 per month and Second Brain sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Monolithos Core ships an update every 2 months, Second Brain weekly. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Monolithos Core | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 143 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Monolithos,LLC](https://appshunter.io/developer/1882248713) | [Liwei Xie](https://appshunter.io/developer/1106616046) |

## What reviewers say

### Monolithos Core

[App page](https://appshunter.io/ios/app/monolithos-core/id6760003709)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| THE CORE — Monthly | $39.99 | per month |
| THE MAX — Monthly | $89.99 | per month |
| THE CORE — Annual | $349.00 | per year |
| THE MAX — Annual | $859.00 | per year |
| 1,500 Creation Credits | $11.99 | one-time |
| MMC Memory Boost Pack | $11.99 | one-time |
| 3,500 Creation Credits | $29.99 | one-time |
| 10,000 Creation Credits | $79.99 | one-time |


### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340)

This AI-powered journal captures your thoughts via voice or text, automatically organizing and connecting them. It helps you recall memories, discover patterns, and reflect on your growth.

**Highlights:** AI classification, tagging, and summarization, Semantic search by meaning, Three-layer memory system, People cards for relationship tracking, Weekly AI reflections, Voice input with transcription, Data export (JSON + Markdown)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Pro | $4.99 | per month |
| Second Brain Pro | $39.99 | per year |


## Frequently asked questions

### Is Monolithos Core free?

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

### Is Second Brain free?

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

### Do Monolithos Core or Second Brain have ads?

Neither Monolithos Core nor Second Brain shows ads.

### Which is updated more often, Monolithos Core or Second Brain?

Monolithos Core ships an update every 2 months, and Second Brain weekly. Most recently, Monolithos Core was updated on September 10, 2026 and Second Brain on September 8, 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.*