The number of books you can check out and place on hold, per account, as well as the loan period for eBooks and eAudiobooks is dependent on the platform. Here is a helpful summary:
OverDrive (Libby app): 10 checkouts, 21-day loan period, 10 holds
TumbleBook Library: No checkouts or holds needed. All items are read within your browser.
CloudLibrary Express: 2 checkouts, no holds allowed, 7-day loan period.
CloudLibrary French eAudiobooks: 10 checkouts, 21-day loan period, 20 holds
Cantook (Canoo app or Aldiko app): 20 checkouts, 21-day loan period, 20 holds
Toutapprendre: Collections are always available, so no check out or holds are required.
Hoopla: 6 checkouts a month for all Hoopla collections (music, movies, and comics), 21-day loan period. Collections are always available, so no holds are required.