Good hunt! This might be very useful for people who wants to achieve their fitness goals. Here is my personal comments on this app as below:

Pros:

• Quite simple and easy user-interface
• Motivates to achieve a goal through organized plans and analytic feedback based on daily workout and activities
• Useful AI bot to provide instantly answers at all time
• Reasonable cost: only USD 1.15 to 2.5 on a weekly base

Cons:

• There are many of similar apps for exercise training such as 'Bodyweight'