Is there a place where you can go to diet and exercise without going anywhere?

Someone could have made a killing if they had a drill sergeant app for exercise and dieting during the pandemic. charge a small fee and e-mail when it is time to exercise (when you can) and what exercises to do and when and what to eat.

"Now it is time to eat a raw fruit for your mid Day snack."

"Now it is time for you to give me 50 sit ups"