Delta updates?

Incremental updates only apply to the platform and revised apps. Incremental app updates for full app version changes would be pointless as nearly every file would change making the incremental package about the same size as the full size download. We don't do differential updates (binary updating of EXEs etc based on deltas) as they would be exceedingly slow on flash media.

Every platform update has had an associated incremental update (1/2 the download size and a MUCH faster install time since you're not getting all the app icons and theme graphics). And every app revision has had an associated incremental update with one exception (qBittorrent Rev 2 as I did not have time to build and test an incremental update). So, CheckSum Control, GIMP, gPodder and WinSCP are the apps with incremental updates available. As well as the platform. So, yes, we're doing incremental updates everywhere we can currently with a single exception due to time when it was released.