I can't say I'm a big fitness fan myself, but we've featured Sportrate Fitness Tracker a few times and I demoed it on video in late 2013. The developers (Inspiro Software) have now released Sportrate Workout which is designed to remind you about your daily workouts and fitness routines.
The native BlackBerry 10 app will also utilize the phones sensor and can count certain exercises, such as push-ups and squats - clever stuff!
Priced at £2.50/$3.99 the app isn't the cheapest, but if you're a fitness fanatic, or a wannabe one who needs a bit of inspiration this could well be the perfect solution for you.
Many Activities: Push-Ups, Sit-Ups, Squats, Planks
Uses many phone's sensors to count your activities properly
Planning Workout Sessions
Diary of your fitness activity
LED and SOUND notifications
Sounds alright doesn't it? If you manage to test it out before me, which shouldn't be hard, let us know your thoughts in the comments.