# Stable Diffusion vs Stable Diffusion AI 3.5 Pro

The clearest difference is update cadence: Stable Diffusion at weekly against Stable Diffusion AI 3.5 Pro's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stable Diffusion sells 3 in-app purchases, starting at $5.99 per 7 days and Stable Diffusion AI 3.5 Pro sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stable Diffusion ships an update weekly, Stable Diffusion AI 3.5 Pro fortnightly. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Stable Diffusion | Stable Diffusion AI 3.5 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 23.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 33 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Onur Kaplan](https://appshunter.io/developer/1803971531) | [Glayzer LLC](https://appshunter.io/developer/1775914442) |

## What reviewers say

### Stable Diffusion

[App page](https://appshunter.io/ios/app/stable-diffusion-ai-generator/id6757918876)

Generate unique images from text prompts using AI. Create anime art, realistic photos, digital art, and more for social media, creative projects, or design materials. Offers unlimited access and 4K generation through in-app purchases.

**Highlights:** AI image generation from text, Multiple art styles (anime, realistic, digital), Profile icon and avatar creation, Design material generation, Text to image conversion, 4K image generation (premium)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $5.99 | per 7 days |
| Yearly Plan | $34.99 | per year |
| Lifetime Premium | $99.99 | one-time |


### Stable Diffusion AI 3.5 Pro

[App page](https://appshunter.io/ios/app/stable-diffusion-ai-35-pro/id6796444073)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Access | $7.99 | per 7 days |
| Monthly Pro Access | $19.99 | per month |
| Yearly Pro Access | $59.99 | per year |


## Frequently asked questions

### Is Stable Diffusion free?

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

### Is Stable Diffusion AI 3.5 Pro free?

Stable Diffusion AI 3.5 Pro is free to download, with in-app purchases available.

### Do Stable Diffusion or Stable Diffusion AI 3.5 Pro have ads?

Neither Stable Diffusion nor Stable Diffusion AI 3.5 Pro shows ads.

### Which is updated more often, Stable Diffusion or Stable Diffusion AI 3.5 Pro?

Stable Diffusion ships an update weekly, and Stable Diffusion AI 3.5 Pro fortnightly. Most recently, Stable Diffusion was updated on September 24, 2026 and Stable Diffusion AI 3.5 Pro on September 18, 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.*