# Second Brain Joiner vs Arcora

The clearest difference is price: Arcora at Free against Second Brain Joiner's $3.99. Arcora also leads on update cadence (every 4 days vs every 3 weeks). Second Brain Joiner's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Arcora is free to download; Second Brain Joiner costs $3.99 up front. Arcora sells 1 one-off in-app purchase. Second Brain Joiner asks for nothing beyond the download.

Second Brain Joiner ships an update every 3 weeks, Arcora every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Second Brain Joiner | Arcora |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arcora/id6775688996/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 11 MB | 12 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hirofumi Inoue](https://appshunter.io/developer/1886583968) | [明辉 沈](https://appshunter.io/developer/6775673216) |

## What reviewers say

### Second Brain Joiner

[App page](https://appshunter.io/ios/app/second-brain-joiner/id6760870675)

This tool optimizes AI input by merging and formatting Markdown notes. It intelligently filters content, calculates optimal chunk sizes for AI context windows, and maintains original file structure for enhanced AI accuracy and security.

**Highlights:** Advanced filtering by tags and dates, High-precision token calculation, Smart chunking for AI context limits, Local-first absolute security, Folder structure maintenance, Timestamping for context

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

**In-app purchases:** none


### Arcora

[App page](https://appshunter.io/ios/app/arcora/id6775688996)

Organize and search your AI chat history with this app. It transforms ZIP archives from various AI models into a private, searchable knowledge base on your iPhone or iPad. Easily browse, search, and export your past conversations.

**Highlights:** Private searchable knowledge library, Import AI chat archives, On-device conversation parsing, Search across messages, Export as Markdown or PDF, Basic statistics review

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Arcora Pro | $4.99 | one-time |


## Frequently asked questions

### Is Second Brain Joiner free?

Second Brain Joiner costs $3.99, with no in-app purchases.

### Is Arcora free?

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

### Do Second Brain Joiner or Arcora have ads?

Neither Second Brain Joiner nor Arcora shows ads.

### Which is updated more often, Second Brain Joiner or Arcora?

Second Brain Joiner ships an update every 3 weeks, and Arcora every 4 days. Most recently, Second Brain Joiner was updated on October 31, 2026 and Arcora 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.*