Stack vs RetouchAI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stack
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.
- 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
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Stack is the easiest way to create perfectly aligned before-and-after photos and videos. Powered by advanced on-device computer vision, Stack automatically aligns your photos with exceptional accuracy, helping you showcase transformations, progress, and projects without tedious manual adjustments. Whether you’re documenting a renovation, fitness journey, restoration, build project, or creative work, Stack makes your before-and-after comparisons look professional and effortless. Create engaging animations and export high-quality videos ready for social media. Fine-tune transition speed, match animations to any music BPM, and export at up to 120 FPS for incredibly smooth playback. Features: • Automatic photo alignment using advanced on-device computer vision • Precise manual adjustments when needed • Create stunning before-and-after comparisons in seconds • Export animated videos for social media • Match animation speed to any music BPM • Export at up to 120 FPS • Fast, private processing directly on your device • No watermarks on your work Stack is free to use. Upgrade to unlock unlimited automatic photo alignment and get the fastest, most accurate comparison workflow available. No recurring subscriptions. No monthly fees. No annual plans. Just a powerful before-and-after app built for creators, makers, professionals, and anyone who wants to showcase progress the right way.
RetouchAI
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RetouchAI is your ultimate AI-powered photo editing app, designed to help you create and enhance images with ease. Whether you're a casual creator or a professional, RetouchAI offers cutting-edge tools to elevate your visual content. Effortlessly generate stunning images from text prompts, extend your photos with seamless outpainting, refine details with precision inpainting, and remove unwanted objects using the erase feature. Start with 5 free credits to explore these advanced tools. When you're ready for more, you can easily purchase additional credits in-app to unlock the full potential of RetouchAI and keep creating high-quality results.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Stack | RetouchAI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Monthly | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 12 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Pavlo Chernovolenko | David Fernandez |
In-app purchases
Stack
- Stack Pro (Lifetime)$4.99
RetouchAI
- 10 AI Tokens$4.99
- 20 AI Tokens$8.99
- 30 AI Tokens$12.99
