# Outline vs Caliu

The clearest difference is in-app purchases: Outline at none against Caliu's 2. Outline also leads on update cadence (every 4 days vs every 9 days) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Caliu sells 2 in-app purchases, starting at $1.99 per month. Outline asks for nothing beyond the download.

Outline ships an update every 4 days, Caliu every 9 days. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Outline | Caliu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/caliu-markdown-notes/id6761850487/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | — | Free |
| Size | 8 MB | 210 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Mohammed Asif](https://appshunter.io/developer/1867170818) | [Marc Torrelles](https://appshunter.io/developer/1712257538) |

## What reviewers say

### Outline

[App page](https://appshunter.io/ios/app/outline-tasks-and-notes/id6758430912)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caliu

[App page](https://appshunter.io/ios/app/caliu-markdown-notes/id6761850487)

A minimalist markdown notes app designed for writers, offering a distraction-free writing experience with features like nested tags, reminders, and cross-device syncing. It allows for easy export and integration with external tools.

**Highlights:** Markdown writing with live formatting, Nested and colored tags for organization, Cross-device sync across iPhone, iPad, and Mac, Reminders for notes, Export to various formats (Markdown, ePub, RTF), REST API and MCP server for integration, Customizable themes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caliu Pro - Monthly | $1.99 | per month |
| Caliu Pro - Yearly | $17.99 | per year |


## Frequently asked questions

### Is Outline free?

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

### Is Caliu free?

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

### Do Outline or Caliu have ads?

Neither Outline nor Caliu shows ads.

### Which is updated more often, Outline or Caliu?

Outline ships an update every 4 days, and Caliu every 9 days. Most recently, Outline was updated on October 11, 2026 and Caliu on October 16, 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.*