I'm a professional physician who have developed my first android application.
We've all heard it: the bigger a guys feet... the bigger a guys nose... the bigger a guys thumb... the taller a guy is... But can you really predict a guys penis size?
Science says you can!
Scientific studies have shown that the ratio between the lengths of a mans index and ring fingers on the right hand (the so called 2D:4D-ratio) correlates with the length of his penis. The ratio is believed to be influenced by fetal exposure to the sex hormones testosteron and estrogen. This is why it is possible to use this ratio to estimate penis size.
Using the 2D:4D-ratio, I have developed a scientifically based penis length estimator which is available on Android. Check it out at:
https://play.google.com/store/apps/deta ... hestimator