If you want to get the most out of your workouts, this is your app. Do not doubt that you will achieve it!
If I have learned anything after making many mistakes, it is that if you want a sustainable change...
Keep it real! It is better a long-term change, and forever, than living forever doing "miracle diets" that end in failure. All change requires time, patience and learning.
There is no incapable body, you can achieve everything you set your mind to, if you haven't achieved it yet, perhaps you just need a little more time.