Steps not matching my watch or treatmill?

https://cashwalklabs.moneple.com/usa/5282672

Every night when I go to the app my steps for the day are always short!

What is on my watch or on a screen from a treadmill is always higher then what the app is showing I did! My watch is almost at 11500 steps and the app isn't even at 10000? 

How do I get the ap to correctly count my steps?

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