Collagio | Photo Collage Maker With Grid Layouts, Multi-Page Carousel and PNG Export - SwiftUI

Collagio – iOS Photo Collage Maker Template (SwiftUI)

Collagio is a complete, ready-to-publish iOS photo collage and grid maker built entirely in SwiftUI. Pick one of 24+ grid layouts, fill the cells with your photos, customize backgrounds, borders, corners and aspect ratios, then export high-resolution PNG collages to the Camera Roll or share them anywhere – including as multi-page carousel slides.

Demo Instructions

• Collagio is a 100% offline app. There is no login and no demo credentials are needed.
• Open the project in Xcode, run it on a simulator or device, and the full app works immediately.
• The premium unlock uses StoreKit 2 with the product id “collagio_pro” (one-time, lifetime). In the simulator you can test the purchase flow with a StoreKit configuration file; no account or server is required.

Everything the App Does

• 24+ collage grid layouts – 16 free layouts plus premium layouts with lock overlays
• Multi-page carousel projects (create Instagram-style multi-slide collages)
• Multi-photo picker to fill every grid cell at once (up to 4, 6 or more photos per grid)
• Solid color backgrounds (10 curated colors) plus 8 ready-made gradient backgrounds
• Adjustable borders: width, inset and corner radius
• 4 export aspect ratios: 4:5, 1:1, 1.91:1 and 9:16 (up to 2160×3840 pixels)
• Per-photo editing: replace, flip horizontally / vertically, rotate, arrange and adjust opacity
• Pan and zoom the whole canvas with pinch gestures
• High-resolution PNG export to Camera Roll with “Saved” confirmation toast
• Share via the native iOS share sheet (Messages, Mail, Instagram, TikTok and more)
• Project library with thumbnails, 2-column grid, timestamps and delete with confirmation
• Full project state persistence with SwiftData – reopen any project exactly where you left off
• Custom floating tab bar (Projects / big + button / Settings)
• 3-page onboarding flow with cross-fade transition into the app
• Paywall screen (one-time lifetime unlock) with feature list and restore purchases
• StoreKit 2 integration: product loading, purchase, transaction listener, current entitlements, restore
• Settings: appearance switcher (System / Light / Dark), unlock PRO, restore, rate app, contact, terms and privacy links
• “More Apps” cross-promotion section (easy to replace with your own apps)
• Automatic rating prompt after 5 sessions (SKStoreReviewController)
• Photo library permission handling with a friendly alert
• Full dark mode support via adaptive color sets
• Clean empty states and loading states in the projects library

Technology

• SwiftUI – 100% programmatic UI, no storyboards
• SwiftData for project persistence (CloudKit-ready with automatic local fallback)
• StoreKit 2 for the one-time lifetime in-app purchase
• PhotosUI / Photos for the system photo picker and Camera Roll saving
• UIKit bridging for share sheet and image rendering at full export resolution
• Core Graphics canvas rasterization (export at up to 2160×3840 px)
• Deployment target: iOS 17.0 – iPhone only, portrait
• Zero third-party dependencies – no CocoaPods, no SPM packages

What the Buyer Gets

• Complete Xcode project source code (Swift files, asset catalog, app icon)
• Full documentation.html setup guide with screenshots
• Screenshots folder with all app screens
• Free future updates to this template

Development Disclosure

Portions of this template’s source code were developed with AI-assisted tools. All code has been reviewed, tested and builds successfully with Xcode.

Please Note

This is a source code template. Xcode knowledge is required to build, customize and publish the app. The buyer receives the full source code and documentation – not a compiled app.