Sam Harris's Awaken App. I've used Headspace and other apps; they've all helped with stress. Sam's approach seems to be more procedural, more of a step by step (if such a thing as true mindfulness can have a step by step).

I've meditated for the better part of a decade but after doing his 50 day course (on the app) I experienced that awakening that they talk about. While it's helped with staying focused and getting work done, I've connected more with my children and wife I have in years.

I highly recommend it to anyone whose tried or thought about meditation but just can't seem to "get it."

https://wakingup.com/