Are there home or lock screen widgets?

Yes, on iOS. Long-press your home or lock screen, tap the + button, search for WitnessWork, and pick the widget you want. Service Report shows this month's hours toward your goal and how much a day it takes to reach it, on your home or lock screen; if you don't log hours, it shows this month's conversations and studies, counted as in the app. Calendar, Appointments, Contacts, and Pet Companion go on your home screen. Widgets move on to the new day at midnight even if you don't open WitnessWork; if one looks out of date, open the app.