Sale has ended but you can still get this app.
Download StayFit – Fitness Workouts Now

Official Description

StayFit is the perfect addition to your daily training.

Create your personal workout by simply choosing suitable exercises.
Keep track of your training progress and view which muscles are stressed with each training.

Keep also track of your Running, Cycling and Hiking Acitivites and view detailed Speed and Altitude Graphs.

Features:
> Running Tracker
> Cycling Tracker
> Hiking Tracker
> Speed Graph
> Altitude Graph
> Time Statistics
> Training reminder (Notification)
> Create custom trainings
> Progress graph
> Stressed muscles view
> Achievements
> Beautiful Android 4.0 Design
> Respects the privacy of your data


StayFit provides exercises for:
> Dumbbell
> Exercise ball
> Exercise bands
> Body only

No registration is needed, just download, install and stay fit.