# Stack vs RetouchAI

The clearest difference is iOS requirement: RetouchAI at 13.4 against Stack's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Stack sells 1 one-off in-app purchase and RetouchAI sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Stack | RetouchAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/stack-before-and-after-photos/id1095740881/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 40 MB |
| Requires iOS | 26.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pavlo Chernovolenko](https://appshunter.io/developer/858517820) | [David Fernandez](https://appshunter.io/developer/1744156409) |

## What reviewers say

### Stack

[App page](https://appshunter.io/ios/app/stack-before-and-after-photos/id1095740881)

Effortlessly create professional before-and-after photo and video comparisons. Advanced on-device technology automatically aligns your images, perfect for showcasing transformations in fitness, renovations, or projects. Export smooth, high-quality animations for social media.

**Highlights:** Automatic photo alignment, Manual adjustment options, Create before-and-after comparisons, Export animated videos, Match animation to music BPM, High FPS video export, On-device processing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro (Lifetime) | $4.99 | one-time |


### RetouchAI

[App page](https://appshunter.io/ios/app/retouchai/id6670794301)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 AI Tokens | $4.99 | one-time |
| 20 AI Tokens | $8.99 | one-time |
| 30 AI Tokens | $12.99 | one-time |


## Frequently asked questions

### Is Stack free?

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

### Is RetouchAI free?

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

### Do Stack or RetouchAI have ads?

Neither Stack nor RetouchAI shows ads.

### Which is updated more often, Stack or RetouchAI?

Stack ships an update monthly, and RetouchAI monthly. Most recently, Stack was updated on November 2, 2026 and RetouchAI on October 27, 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.*