# Kaizen vs ADHD Todo

The clearest difference is update cadence: Kaizen at every 2 weeks against ADHD Todo's every 4 weeks. ADHD Todo's advantage is iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Kaizen sells 2 in-app purchases, starting at $3.99 per month and ADHD Todo sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Kaizen ships an update every 2 weeks, ADHD Todo every 4 weeks. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Kaizen | ADHD Todo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Size | 68 MB | 67 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MK Development](https://appshunter.io/developer/1853083060) | [Kaizen Flow Inc](https://appshunter.io/developer/1730809563) |

## What reviewers say

### Kaizen

[App page](https://appshunter.io/ios/app/kaizen-focus-and-study-timer/id6755314708)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $3.99 | per month |
| Premium (yearly) | $44.99 | per year |


### ADHD Todo

[App page](https://appshunter.io/ios/app/adhd-todo/id6755389010)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Yearly Subcription | $9.99 | per year |


## Frequently asked questions

### Is Kaizen free?

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

### Is ADHD Todo free?

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

### Do Kaizen or ADHD Todo have ads?

Neither Kaizen nor ADHD Todo shows ads.

### Which is updated more often, Kaizen or ADHD Todo?

Kaizen ships an update every 2 weeks, and ADHD Todo every 4 weeks. Most recently, Kaizen was updated on October 1, 2026 and ADHD Todo 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.*