Stack vs RetroAlign

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.

RetroAlign helps you capture perfectly aligned photos by overlaying reference images on your camera view. Perfect for photographers, artists, and anyone who needs precise alignment when recreating shots. KEY FEATURES: • Overlay Reference Photos - Select any photo from your library and overlay it on your live camera view • Adjustable Transparency - Use the slider to fine-tune overlay opacity for perfect alignment • Zoom & Pan Controls - Tap to zoom 3x and drag to pan for precise positioning • Flash Control - Cycle through off, on, and auto flash modes • Side-by-Side Comparison - Compare your captured photo with the reference image • Auto-Save - Photos automatically save to your camera roll PERFECT FOR: • Photographers recreating shots • Artists aligning new work with references • Anyone needing precise camera alignment • Before/after comparisons • Matching angles and compositions HOW IT WORKS: 1. Select a reference photo from your library 2. Adjust overlay transparency to see both images 3. Align your camera view with the reference 4. Use zoom and pan for precision 5. Capture your perfectly aligned photo 6. Compare and save Simple, intuitive, and designed for precision.