A very good website.
Top right has the scale, and next to the scale there is a rating whether it is currently a good time for loot. It also indicate how much longer this trend will stay.
The website also provided a place where you can change the language which take cares of all of the player from around the world.
This website does indicate that they only simulate the game to predict these value. How good are they?
I actually tried it out by playing manually, and it seems about 70 to 80% accurate.
Never tried it with bot tho because with bot I generally just leave it running 24/7.
I haven't yet found an app for android, so maybe if someone else know it, they can also reply here.
Edited by yoshigamer415, 30 March 2016 - 09:04 PM.