# Stack vs RetroAlign

The clearest difference is in-app purchases: RetroAlign at none against Stack's 1. RetroAlign also leads on iOS requirement (17 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Stack sells 1 one-off in-app purchase. RetroAlign asks for nothing beyond the download.

## The numbers

| Metric | Stack | RetroAlign |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 3 MB |
| Requires iOS | 26.0 | **17** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pavlo Chernovolenko](https://appshunter.io/developer/858517820) | [Christopher Krueger](https://appshunter.io/developer/1860994089) |

## 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 |


### RetroAlign

[App page](https://appshunter.io/ios/app/retroalign/id6756504501)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stack free?

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

### Is RetroAlign free?

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

### Do Stack or RetroAlign have ads?

Neither Stack nor RetroAlign shows ads.

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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.*