Want an app to measure angles and distance on a photo

[buryman]

All I can find are apps to measure distance/angle from your phone to another object IRL.
I just need a lot simpler app to measure between 2 points on an existing image in my gallery & preferably the angle from v or h, if such a thing exists.

 

[Golfdriver97]

I know a lot of people like the Smart tools line of apps. But I am not sure how they measure, and if they measure the way you need them to.