# AINotes vs ObsiKO

The clearest difference is device support: ObsiKO at 4 against AINotes's 2. ObsiKO also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AINotes ships an update every 9 days, ObsiKO every 6 days. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | AINotes | ObsiKO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/ainotes-note-taking-and-pdf/id6770277194/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 6 days** |
| Monetization | Free | — |
| Size | 223 MB | 75 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [PRODSOFT PTE LTD](https://appshunter.io/developer/1896729840) | [Hyojin Kim](https://appshunter.io/developer/6783405453) |

## What reviewers say

### AINotes

[App page](https://appshunter.io/ios/app/ainotes-note-taking-and-pdf/id6770277194)

This app offers a natural handwriting experience on an infinite canvas for note-taking and document annotation. Organize study, work, and creative projects with features like multiple layers, split-screen editing, and PDF annotation. It supports various file formats and offers iCloud sync for seamless device transfer.

**Highlights:** Infinite canvas for freeform ideation, Paper-like handwriting with Apple Pencil support, Annotate PDFs, DOCs, PPTs, and ebooks, Multiple layers for complex editing, Split-screen editing for side-by-side notes, OCR for text recognition from scanned documents, iCloud sync across iPhone and iPad

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

**In-app purchases:** none


### ObsiKO

[App page](https://appshunter.io/ios/app/obsiko-ai-note-plus-mindmap/id6783405451)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AINotes free?

AINotes is free to download, with no in-app purchases.

### Is ObsiKO free?

ObsiKO is free to download, with no in-app purchases.

### Do AINotes or ObsiKO have ads?

Neither AINotes nor ObsiKO shows ads.

### Which is updated more often, AINotes or ObsiKO?

AINotes ships an update every 9 days, and ObsiKO every 6 days. Most recently, AINotes was updated on October 5, 2026 and ObsiKO on October 10, 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.*