The Android app is located here:
The android app: GivePulse SignIn allows admins of events and volunteer opportunities to sign people in, flag them as no-shows, and most importantly clock in and out (check in or check out) people to track their attendance, time and hours.
Use GivePulse SignIn as a kiosk or on the go to sign in or clock in and out people serving at food pantries, races, centers, kitchens you name it.
When logged in as an administrator you will see a list of events you are overseeing:
Per event, you can select and sign in the individuals that attended your event:
In the case you wanted to flag those that did not attend or undo a sign-in you can do so as shown: