It is a standalone watch app, there is no phone app. You login by going to https://microsoft.com/devicelogin and entering a code shown on the watch screen.
This app collects no user information, uses no-third-party software or services, and only talks to Microsoft’s To Do servers. Authentication tokens are stored in Apple’s secure KeyChain. I don’t want your data.
There are significant restrictions because Microsoft don’t currently expose all To Do functionality to app developers. These restrictions include:
If you are using a corporate account, you may get an error:
Sorry, but we’re having trouble signing you in. AADSTS650053: The application 'Watch ToDo' asked for scope 'Tasks.Read,Tasks.Read.Shared,Tasks.ReadWrite,Tasks.ReadWrite.Shared,offline_access' that doesn't exist on the resource '00000003-0000-0000-c000-000000000000'. Contact the app vendor.
I am trying to work out if this is a restriction on what is supported by Microsoft.
You can also DM me on Twitter at @WatchToDoApp
I am Damian Mehers, based in Vaud, Switzerland. I’ve been developing software since I got my ZX81 in 1981. I’ve released other apps including Voice in a Can (Alexa on your Apple Watch), Kanbann (Trello on your Apple Watch), and WatchGit (GitHub on your Apple Watch).
Try out the beta: https://testflight.apple.com/join/8ELxnE0e