# Messo vs ObsiKO

The clearest difference is device support: ObsiKO at 4 against Messo's 2. ObsiKO also leads on iOS requirement (15.1 vs 17.6). 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.

Messo ships an update every 4 days, ObsiKO every 6 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Messo | ObsiKO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/obsiko-ai-note-plus-mindmap/id6783405451/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 days |
| Monetization | — | Free |
| Size | 81 MB | 77 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Stas Morozov](https://appshunter.io/developer/541842204) | [Hyojin Kim](https://appshunter.io/developer/6783405453) |

## What reviewers say

### Messo

[App page](https://appshunter.io/ios/app/messo-to-do-notes-tasks/id6758547513)

**Features:** macOS Compatibility

**In-app purchases:** none


### ObsiKO

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

This app integrates writing, knowledge management, and mind mapping with AI assistance. It supports various file formats and offers unique features for Korean language users, including a focus timer and GitHub syncing for secure data management.

**Highlights:** AI-assisted writing and mind mapping, Supports Obsidian vaults (.md, .canvas, .base), Korean dictionary and spell checker, Lock Screen focus timer, GitHub sharing and syncing, Automatic note connection and organization, Infinite mind-map canvas with Apple Pencil support

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

**In-app purchases:** none


## Frequently asked questions

### Is Messo free?

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

### Is ObsiKO free?

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

### Do Messo or ObsiKO have ads?

Neither Messo nor ObsiKO shows ads.

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

Messo ships an update every 4 days, and ObsiKO every 6 days. Most recently, Messo was updated on October 28, 2026 and ObsiKO on October 25, 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.*