# Thread Mark vs Arcus

The clearest difference is ads: Arcus at none against Thread Mark's shown. Arcus also leads on update cadence (every 2 days vs fortnightly). Thread Mark's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Thread Mark sells 2 one-off in-app purchases and Arcus sells 3 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Thread Mark ships an update fortnightly, Arcus every 2 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Thread Mark | Arcus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 49 MB | 76 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Koya Kurauchi](https://appshunter.io/developer/1887146796) | [Rishab Aggarwal](https://appshunter.io/developer/6781765722) |

## What reviewers say

### Thread Mark

[App page](https://appshunter.io/ios/app/thread-mark-markdown-notes/id6775019899)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy the Developer a Coffee | $2.99 | one-time |
| ThreadMark Pro | $9.99 | one-time |


### Arcus

[App page](https://appshunter.io/ios/app/arcus-ai-chatbot-and-agent/id6810542982)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Arcus Unlimited Monthly | $12.99 | per month |
| Arcus Unlimited Annual | $79.99 | per year |
| Arcus Unlimited Annual | $79.99 | per year |


## Frequently asked questions

### Is Thread Mark free?

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

### Is Arcus free?

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

### Do Thread Mark or Arcus have ads?

Thread Mark shows ads; Arcus does not.

### Which is updated more often, Thread Mark or Arcus?

Thread Mark ships an update fortnightly, and Arcus every 2 days. Most recently, Thread Mark was updated on October 25, 2026 and Arcus on October 26, 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.*