# HTX Clay vs Obsidian Flow Studio

The clearest difference is ads: Obsidian Flow Studio at none against HTX Clay's shown. Obsidian Flow Studio also leads on update cadence (every 2 weeks vs every 6 weeks). HTX Clay's advantage is iOS requirement (14.0 vs 16.0). On price, in-app purchases and device support there is nothing between them.

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

HTX Clay ships an update every 6 weeks, Obsidian Flow Studio every 2 weeks. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | HTX Clay | Obsidian Flow Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 125 MB | 192 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HTX Clay LLC](https://appshunter.io/developer/1650397223) | [Obsidian Flow LLC](https://appshunter.io/developer/1793356707) |

## What reviewers say

### HTX Clay

[App page](https://appshunter.io/ios/app/htx-clay/id6443902470)

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

**In-app purchases:** none


### Obsidian Flow Studio

[App page](https://appshunter.io/ios/app/obsidian-flow-studio/id6775567219)

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

**In-app purchases:** none


## Frequently asked questions

### Is HTX Clay free?

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

### Is Obsidian Flow Studio free?

Obsidian Flow Studio is free to download, with no in-app purchases.

### Do HTX Clay or Obsidian Flow Studio have ads?

HTX Clay shows ads; Obsidian Flow Studio does not.

### Which is updated more often, HTX Clay or Obsidian Flow Studio?

HTX Clay ships an update every 6 weeks, and Obsidian Flow Studio every 2 weeks. Most recently, HTX Clay was updated on October 4, 2026 and Obsidian Flow Studio on October 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.*