When uploading a large number of photos from an iPhone, the photo picker can be slow to respond after you tap "Add". This is an iOS limitation, not a problem with Gather & Group. There's a simple setting that fixes it.
To speed things up:
- Tap Select Files on the upload page
- Choose Photo Library
- Tap the three dots (...) in the bottom-left corner
- Tap Options
- Change Format to Current
That's it. From now on, selecting and uploading photos will be much faster.
This option is available on iPhones running iOS 15 or later.