# The Y Principle vs KammyTask

The clearest difference is update cadence: KammyTask at every 4 days against The Y Principle's every 3 weeks. The Y Principle's advantage is device support (4 vs 2) and iOS requirement (14 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. The Y Principle sells 5 in-app purchases, starting at $5.99 per month and KammyTask sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

The Y Principle ships an update every 3 weeks, KammyTask every 4 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | The Y Principle | KammyTask |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/kammytask-energy-based-tasks/id6741113699/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 44 MB | 120 MB |
| Requires iOS | **14** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [taskfabric ltd](https://appshunter.io/developer/719533762) | [Vivifyze LLC](https://appshunter.io/developer/1776865593) |

## What reviewers say

### The Y Principle

[App page](https://appshunter.io/ios/app/the-y-principle/id1632870479)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Quarterly | $15.99 | per 3 months |
| Pro Yearly | $49.99 | per year |
| "Ask AI" Token Base Pack | $2.99 | one-time |
| "Ask AI" Token Big Pack | $7.99 | one-time |


### KammyTask

[App page](https://appshunter.io/ios/app/kammytask-energy-based-tasks/id6741113699)

This task manager adapts to your energy levels, hiding overwhelming tasks on low-energy days. It breaks down large tasks into manageable steps and logs self-care activities as progress. Designed for those with unpredictable energy, it avoids guilt-inducing notifications and focuses on positive reinforcement.

**Highlights:** Energy level-based task filtering, AI-powered task creation from voice notes, Automatic breakdown of large tasks, Logging of rest and self-care as progress, Guilt-free notifications and progress tracking, Flexible task list that adapts to daily capacity

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | per month |


## Frequently asked questions

### Is The Y Principle free?

The Y Principle is free to download, with in-app purchases available.

### Is KammyTask free?

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

### Do The Y Principle or KammyTask have ads?

Neither The Y Principle nor KammyTask shows ads.

### Which is updated more often, The Y Principle or KammyTask?

The Y Principle ships an update every 3 weeks, and KammyTask every 4 days. Most recently, The Y Principle was updated on November 3, 2026 and KammyTask 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.*