# さくらdays vs Second Brain Joiner

The clearest difference is review sentiment: Second Brain Joiner at 100% against さくらdays's 0%. Second Brain Joiner also leads on update cadence (every 3 weeks vs every 2 months). さくらdays's advantage is price (Free vs $3.99) and iOS requirement (13.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

さくらdays is free to download; Second Brain Joiner costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

さくらdays ships an update every 2 months, Second Brain Joiner every 3 weeks. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | さくらdays | Second Brain Joiner |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 13 MB | 11 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [株式会社 エステム](https://appshunter.io/developer/1209424711) | [Hirofumi Inoue](https://appshunter.io/developer/1886583968) |

## What reviewers say

### さくらdays

[App page](https://appshunter.io/ios/app/days/id1643103679)

This app connects parents with educators, offering messaging, digital communication logs, photo sales, growth records, and billing information. It requires an account with your childcare facility to use its comprehensive features.

**Highlights:** Messaging between parents and educators, Digital communication logs, Photo sales, Growth record tracking, Billing information viewing, Centralized facility management

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is さくらdays free?

さくらdays is free to download, with no in-app purchases.

### Is Second Brain Joiner free?

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

### Do さくらdays or Second Brain Joiner have ads?

Neither さくらdays nor Second Brain Joiner shows ads.

### Which is updated more often, さくらdays or Second Brain Joiner?

さくらdays ships an update every 2 months, and Second Brain Joiner every 3 weeks. Most recently, さくらdays was updated on October 12, 2026 and Second Brain Joiner on October 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.*