# Kaizen vs SecondBrain

The clearest difference is review sentiment: SecondBrain at 100% against Kaizen's 0%. SecondBrain also leads on rating (5.0 vs 1.5) and update cadence (every 3 days vs every 2 weeks). Kaizen's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Kaizen sells 7 in-app purchases, starting at $3.99 per month and SecondBrain sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

SecondBrain holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 0% of Kaizen's written reviews are positive against 100% of SecondBrain's.

Kaizen ships an update every 2 weeks, SecondBrain every 3 days. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Kaizen | SecondBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/kaizen-tasks-and-calendar/id6746545640/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376/reviews)** |
| Number of ratings | 2 | **6** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 132 MB | 73 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lennard Zieten](https://appshunter.io/developer/1817374089) | [Federico Cesarini](https://appshunter.io/developer/1888767256) |

## What reviewers say

### Kaizen

[App page](https://appshunter.io/ios/app/kaizen-tasks-and-calendar/id6746545640)

This app combines a Kanban board, calendar, and AI assistant to help you organize your tasks and improve continuously. It offers voice commands and customizable aesthetics to create a focused and functional workspace.

**Highlights:** Kanban board for project management, Integrated calendar view, AI assistant with voice commands, Drafts calendar events and creates tasks, Material 3 theming and custom backgrounds

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaizen Pro - Monthly | $3.99 | per month |
| Kaizen Unlimited | $9.99 | per month |
| Kaizen AI | $14.99 | per month |
| Kaizen Pro - Annual | $39.99 | per year |
| Kaizen Unlimited | $47.90 | per year |
| Kaizen AI | $69.90 | per year |
| Kaizen Pro - Lifetime | $179.00 | one-time |


### SecondBrain

[App page](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376)

This app automatically transcribes, titles, and files your spoken thoughts, creating a self-organizing note system. It can convert voice notes into calendar events, provide daily summaries, and allow you to chat with your saved information.

**Highlights:** Automatic transcription and titling, AI-powered self-organizing notes, Voice to calendar event creation, Daily morning briefing summaries, Chat with your notes for answers, 3D brain graph visualization, Full-text search, Cross-app sharing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SecondBrain Pro | $8.99 | per month |
| SecondBrain Pro Yearly | $34.99 | per year |
| SecondBrain Pro Yearly | $44.99 | per year |


## Frequently asked questions

### Is Kaizen free?

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

### Is SecondBrain free?

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

### Which has better reviews, Kaizen or SecondBrain?

SecondBrain is rated higher. Kaizen averages 1.5 out of 5 from 2 ratings, while SecondBrain averages 5.0 from 6 ratings.

### Do Kaizen or SecondBrain have ads?

SecondBrain shows ads; Kaizen does not.

### Which is updated more often, Kaizen or SecondBrain?

Kaizen ships an update every 2 weeks, and SecondBrain every 3 days. Most recently, Kaizen was updated on October 8, 2026 and SecondBrain on October 24, 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.*