
"A guide to mindfulness meditation explores how to use it to enhance cognitive capacities, one's connection with the world, and the richness of all life's experiences,"--NoveList.
A great starting point can be Shinzen Young's The Science of Enlightenment and/or Sam Harris's Waking Up.
After that, you might look into Why Buddhism is True or The Yoga Sutras of Patanjali or Mindfulness in Plain English.
The Healthy Gamer Youtube channel also has great videos going into this and how they tie into psychology.
David Chapman's https://meaningness.com/ is also pretty great.
See for example the later chapters of "The Mind Illuminated", or the excellent "Science of Enlightenment" audio talk by Shinzen Young.
The Mind Illuminated by John Yates is the one I see recommended the most, and it's helped me tremendously. It goes through ten stages, from novice to very advanced. I'm still close to the beginning, but the instructions in the first several chapters have helped me make far more progress than I ever had before.
The Science of Enlightenment by Shinzen Young is also quite good, with more of an emphasis on insight rather than concentration meditation. There's also the classic Mindfulness in Plain English.
I do use one app. It lets me set a countdown timer, and plays a quiet gong when time is up. That's it.