# Defter Notes vs AI Productivity OS

Defter Notes and AI Productivity OS are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Defter Notes sells 7 in-app purchases, starting at $2.99 per month and AI Productivity OS sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Defter Notes | AI Productivity OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (75 ratings)](https://appshunter.io/ios/app/defter-notes/id1570783518/reviews)** | — |
| Number of ratings | **75** | — |
| Positive reviews | 75.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 1 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Deft Works ApS](https://appshunter.io/developer/1570783520) | [Daler Soliev](https://appshunter.io/developer/1857844038) |

## What reviewers say

### Defter Notes

[App page](https://appshunter.io/ios/app/defter-notes/id1570783518)

This app provides an infinite canvas for spatial thinking, allowing users to capture, connect, and explore ideas through handwriting, drawing, and text. Organize thoughts with flexible tools and intuitive navigation for enhanced creativity and productivity.

**Highlights:** Infinite canvas for spatial thinking, Handwritten notes, sketches, and typed text, Connect and layer ideas, Organize with Stacks, Deft movement with gestures, Cross-reference and multitask documents, Supports links and files

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Mini Supporter | $2.99 | per month |
| Supporter | $7.99 | per month |
| Yearly Plan | $17.99 | per year |
| Big Supporter | $29.99 | per month |
| Lifetime Access - Welcome Offer | $29.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### AI Productivity OS

[App page](https://appshunter.io/ios/app/ai-productivity-os/id6757797759)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $4.99 | per month |


## Frequently asked questions

### Is Defter Notes free?

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

### Is AI Productivity OS free?

AI Productivity OS is free to download, with in-app purchases available.

### Do Defter Notes or AI Productivity OS have ads?

Neither Defter Notes nor AI Productivity OS shows ads.

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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.*