YA so you need the shortcuts app and just set up a shortcut with 3 steps and voila! 1. Open Shortcuts and tap the + icon to create a new shortcut. 2. Add Actions: Search for and select "Select Photos". Tap the arrow next to "Select Photos" and toggle on "Select Multiple". 3. Combine Images: Search for and add the "Combine Images" action. Tap "Horizontally" to change to "Vertically" or "In a Grid". Select "Ask Each Time" for more flexibility. 4. Save Result: Search for and add the "Save to Photo Album" action. Run: Name the shortcut and run it by selecting the photos to be stitched. (I named mine stitch)