Hmmmm. Means you would be a lot busy. My friend I have a suggestion for you if you can manage you can do this easily. Try to cut an old socks from the closed side. Then wear that socks in your arm and fix mobile in your arm with the help of that socks.
That way you can work and @actifit will count your activities. In past, when I was busy like you I did same and easily made 10,000 target in actifit app.
Take care
ALLAH HAFIZ.