Detailed text transcripts for TV channel - KGO - 20140731:09:56:00
Her all-time high, 225 pounds. >> i didn't have energy. and i didn't want to get on the floor and play with them. i was unhappy with myself. >> reporter: but getting on an exercise program. >> never, i had never exercise in my life. >> reporter: so she turned to pact. it is an app that uses money to motivate your workouts. >> weight has a secret weapon. pact. >> reporter: and it worked. tiffany lost 90 pounds. >> it seemed like it was just for me. it was made for me. i realized i could make money at it. >> reporter: you give the app your credit card or paypal information. each week you pledge ...