Looking for a HRM

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Hi I'm hoping someone tech-smart can help me out!

I'm looking for a heart rate monitor for tracking running & dancing, but preferably one I can wear all day. I'm not bothered about reading my texts or anything, just heart-rate and calories burned and maybe GPS for running.

I've heard the fit bit charge can be unreliable, so I was looking at Garmin and Polar.
Can anyone give me some advice?