# AI Notes vs Obius

The clearest difference is ads: Obius at none against AI Notes's shown. Obius also leads on update cadence (weekly vs every 4 months). AI Notes's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. AI Notes sells 9 in-app purchases, starting at $1.99 per 7 days and Obius sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

AI Notes ships an update every 4 months, Obius weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | AI Notes | Obius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/obius-notes-that-evolve/id6760918821/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 53 MB | 23 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Pursharth Zutshi](https://appshunter.io/developer/1856952308) | [DAED LLC](https://appshunter.io/developer/1886797794) |

## What reviewers say

### AI Notes

[App page](https://appshunter.io/ios/app/ai-notes-write-and-reply/id6757496314)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ai Notes Pro (Weekly) | $1.99 | per 7 days |
| Ai Notes Pro (Monthly) | $5.99 | per month |
| Ai Notes Lite Package | $0.99 | one-time |
| Ai Notes Power Package | $1.99 | one-time |
| Pro Pack | $2.99 | one-time |
| Ai Notes Elite Package | $3.99 | one-time |
| Ai Notes Ultimate Package | $5.99 | one-time |
| Ai Notes Mega Package | $9.99 | one-time |
| Ai Notes Supreme Package | $24.99 | one-time |


### Obius

[App page](https://appshunter.io/ios/app/obius-notes-that-evolve/id6760918821)

This app offers a visual workspace for organizing notes and ideas. It allows for reusable content blocks, color-coded sections for intent, and AI-powered features for content generation and semantic search. It prioritizes privacy with local-first storage and end-to-end encryption.

**Highlights:** Visual workspace for notes and ideas, Reusable content blocks (Loops), Color-coded sections by intent, AI-powered content generation and search, Version history and snapshots, Offline functionality and end-to-end encryption

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Obius Pro Founder | $4.99 | per month |
| Obius Pro Monthly | $9.99 | per month |
| Pro Annual | $79.99 | per year |
| Power Pack | $9.99 | one-time |


## Frequently asked questions

### Is AI Notes free?

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

### Is Obius free?

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

### Do AI Notes or Obius have ads?

AI Notes shows ads; Obius does not.

### Which is updated more often, AI Notes or Obius?

AI Notes ships an update every 4 months, and Obius weekly. Most recently, AI Notes was updated on November 5, 2026 and Obius on November 5, 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.*