A mobile gallery app is best for clients who will return to the gallery often. It gives them a home-screen icon, a cleaner mobile entry point, and a more personal way to revisit the photos.
Use it for high-touch clients
Weddings, birthdays, family sessions, and long-running event galleries are good fits. A quick proofing gallery with a short lifespan may not need it.
Use the gallery cover as the app icon
The icon should feel personal. Using the gallery cover image makes the saved app instantly recognisable on the client's phone.
Explain Safari clearly on iPhone
On iPhone, Add to House Screen is handled through Safari. If the client opens the link in another browser, they should be told to copy the link and open it in Safari.
Keep the instructions short
The best instruction screen does not over-explain. It shows the app name, icon, and one clear action: tap Share, then Add to House Screen.