What is Reddit's opinion of Bicycle Tire Pressure Calc?

From 3.5 billion Reddit comments

You should be in the upper range depending on your weight and say you are heavy. Also remember if you are heavier, you especially cannot leave your tires for weeks at time and not re-top or re-inflate them. Here is an android app for calculating tire pressure you can try out:
https://play.google.com/store/apps/details?id=com.edisongauss.bertotirepressure&hl=en

And here is a very technical article on what to inflate your tires to:
http://www.bikequarterly.com/images/TireDrop.pdf

I tried the Berto recommended tire pressure according to the android app and I found I had frequent flats when I tired that. My ride did feel more comfortable then now, but I rather flat less.

Also if anyone is wondering here is the article the graph he posted is from:
http://problemsolversbike.com/blog/comments/optimal_bike_tire_pressure

According to: >http://problemsolversbike.com/blog/comments/optimal_bike_tire_pressure
>Harder tires aren’t any faster than softer tires. There’s a sweet spot for tire pressure between too-hard and too-soft, and you waste energy both ways. That sweet spot is a 15% “drop,” which is how much you squish the tires when you get on the bike.

>Front and rear tires need different amounts of air pressure. Bikes put more weight on the rear, which is why rear tires wear faster, and why you have fewer spokes in the front. The rear tire needs higher pressure for the same optimal drop.

And if I use the recommended Bicycle Tire Pressure Calculator, Android App they recommend, it says I actually should inflate the tire less than the manufacturer recommends on the sidewall. I don't know exactly what to think about that. That Android page mentions:
>Popular misconception is to pump a bike's tires to the highest number printed on the sidewall by the manufacturer. Instead, the optimal pressure is that which yields in a 15% sidewall drop. Sidewall drop is a non-linear function of the load on the tire and its width. It can be computed based on the weight of the bike, rider, bags, and gear. It is also different between front and back, depending on the frame geometry.