# IDZ vs Kaizen

The clearest difference is rating: IDZ at 3.8 against Kaizen's 1.5. Kaizen's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. IDZ sells 2 in-app purchases, starting at $14.99 per month and Kaizen sells 7 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

IDZ holds the better App Store score, 3.8 against 1.5. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

IDZ ships an update every 5 weeks, Kaizen every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | IDZ | Kaizen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/idz/id1556869062/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/kaizen-tasks-and-calendar/id6746545640/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 97 MB | 132 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IDZ LTD](https://appshunter.io/developer/1556634372) | [Lennard Zieten](https://appshunter.io/developer/1817374089) |

## What reviewers say

### IDZ

[App page](https://appshunter.io/ios/app/idz/id1556869062)

This app offers a secure, private workspace for AI interactions, encrypted file storage, and secure messaging. It allows users to ask questions across their files and chats, find exact sources, and turn answers into actionable items, all while maintaining control over their data.

**Highlights:** Private AI for files and chats, Encrypted cloud storage, Secure private and group messaging, Find exact sources of information, Summarize, compare, and redact data, Share results into chat or cloud storage

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $14.99 | per month |
| PRO | $149.00 | per year |


### 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 |


## Frequently asked questions

### Is IDZ free?

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

### Is Kaizen free?

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

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

IDZ is rated higher. IDZ averages 3.8 out of 5 from 5 ratings, while Kaizen averages 1.5 from 2 ratings.

### Do IDZ or Kaizen have ads?

Neither IDZ nor Kaizen shows ads.

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

IDZ ships an update every 5 weeks, and Kaizen every 2 weeks. Most recently, IDZ was updated on November 3, 2026 and Kaizen on October 30, 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.*