Guides · Android
How to send photos in order on Android
Why Android changes the order
Gallery and Files pass a batch to the share sheet in whatever order the system keeps, usually by date. If the receiving app sorts again, the order changes again.
The manual workaround
There is no reorder step in the share sheet, so the only manual option is to send photos one at a time and rely on the receiving app leaving them alone.
The route that survives both ends
PicOrder exports the batch with sequential filenames and timestamps as well as the stamped numbers, so both the sending and the receiving app sort them your way.