Hello Dj,

You are not stupid at all.

The iOS app uses the Background Tasks framework and uploads photos and videos using a BGProcessingTask.

Background uploading is managed by the system and depends on priorities set by the system itself. So the uploads can be performed in the coming hours, during the next night or a few days later. This is decided by the system which establishes priorities based on your device and your Piwigo app usage. The argument is that it is frustrating to not know when iOS will decide to upload more photos but it is even more frustrating to realise that the battery is empty when one needs his device.

The Piwigo iOS app therefore uploads in the background (in sleep mode) only if you let your device connected to a charger. So plug your device to a charger before going to bed and let iOS decides. During the development phase of this background task, the app uploaded up to 500 photos during my sleep but it did not upload photos every night unfortunately.

We could probably improve background uploading by uploading a set of photos gathered in an archive (e.g. a single BGProcessingTask uploading a Zip file) but that would require the development of a new API method. May be @plg or someone else of the server team would accept to code it...

I hope this answers your questions and that it is not too disappointing.

Eddy