Wikimedia Apps/Synced Reading Lists/Sync stories

Trying to organized by four dimensions: opt-in status, number of devices, number of accounts and whether the user is "cross OS".

1 device, 1 account, opt in

1 device, 1 account, does not opt in

1 device, 2+ accounts, opt in on both

1 device, 2 accounts, opt in on one

2 or more devices, 1 account, opt-in, both Android

2 or more devices, 1 account, opt-in, both iOS

2 or more devices, 1 account, opt-in, both OS

2 or more devices, 1 account, 1 opt-in/1 or more not opt-in, both Android

2 or more devices, 1 account, 1 opt-in/1 or more not opt-in, both iOS

2 or more devices, 1 account, 1 opt-in/1 or more not opt-in, both OS

2 or more devices, 2+ accounts, opt-in, both Android

2 or more devices, 2+ accounts, opt-in, both iOS

2 or more devices, 2+ accounts, opt-in, both OS

2 or more devices, 2+ accounts, 1 opt-in/1 or more not opt-in, both Android

2 or more devices, 2+ accounts, 1 opt-in/1 or more not opt-in, both iOS

2 or more devices, 2+ accounts, 1 opt-in/1 or more not opt-in, both OS