Here’s a great article that explains why I don’t prescribe knee push-ups. In short you don’t get stronger, read why if you’re curious.
https://breakingmuscle.com/strength-conditioning/why-you-should-never-do-a-pushup-from-your-knees
Everyday Fitness & Movement
"This one step — choosing a goal and sticking to it — changes everything." -Scott Reed
Everyday Fitness & Movement 
the article pops up, then disappears. i’ll try it later.
Got into the article. Finally. Interesting reading.