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.

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