Here are the health apps I use regularly:
Insight Timer – An excellent meditation timer and community including free guided meditations
Universal Breathing – Pranayama – A great pranayama (breath extension) counter
HIIT Interval Training Timer – A simple, free timer for doing interval training that I use at the gym
These apps have really helped me be consistent with my meditation and pranayama.
I hope you find them useful also!
All of them have free versions.
I have upgraded insight timer and universal breathing for about $5 each but you can definitely get a lot out of the free versions as well.