# Principal Task vs Dobby AI Notes

The clearest difference is ads: Principal Task at none against Dobby AI Notes's shown. Dobby AI Notes's advantage is update cadence (weekly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Principal Task sells 2 in-app purchases, starting at $3.99 per month and Dobby AI Notes sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Principal Task ships an update every 3 months, Dobby AI Notes weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Principal Task | Dobby AI Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/principal-task/id1545072734/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 61 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zechariah Schwenk](https://appshunter.io/developer/1545072736) | [Dobby Canvas, Inc.](https://appshunter.io/developer/1332562712) |

## What reviewers say

### Principal Task

[App page](https://appshunter.io/ios/app/principal-task/id1545072734)

This app helps you manage tasks by tracking your completion rate against new tasks created. It offers a unique 'Task Velocity' score to show if you're keeping up with your workload. Organize with folders, contexts, and priorities, with advanced features available through a premium subscription.

**Highlights:** Task Velocity score, GTD-native structure, Due dates and repeating tasks, Markdown support, Kanban boards, Private templates

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Annual Subscription | $29.99 | per year |


### Dobby AI Notes

[App page](https://appshunter.io/ios/app/dobby-ai-notes-your-ai-brain/id6777613545)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan (Monthly) | $4.99 | per month |
| AI Credits - Boost S | $10.00 | one-time |
| AI Credits - Boost M | $50.00 | one-time |
| AI Credits - Boost L | $100.00 | one-time |
| AI Credits - Boost XL | $200.00 | one-time |


## Frequently asked questions

### Is Principal Task free?

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

### Is Dobby AI Notes free?

Dobby AI Notes is free to download, with in-app purchases available.

### Do Principal Task or Dobby AI Notes have ads?

Dobby AI Notes shows ads; Principal Task does not.

### Which is updated more often, Principal Task or Dobby AI Notes?

Principal Task ships an update every 3 months, and Dobby AI Notes weekly. Most recently, Principal Task was updated on November 3, 2026 and Dobby AI Notes on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*