Jake stumbled as the phone escaped his grasp and was launched into a unused urinal. The phone landed shallow water within the urinal. A man behind him grunted "Oh, sorry." Jake stumbled forward awkwardly aware of his bulging full underwear. He grabbed the phone out of the water. It wasn't drowned in it, it couldn't have been that bad, could it? He saw it was turned off, instead of turning it on right away he dried to below an electric hand dryer while cursing softly. The phone turned on. He stumbled into a toilet stall awkwardly regaining awareness of his crotch. Locking the door opening the app again.
The application seemed to work. He sighed and blessed his fortune. He began unbuttoning his trousers and unveiled his new huge equipment. He stared at it awkwardly glad that he wasn't stuck with it. It was at least 8 inches long completely flaccid but not very thick for it's length. In fact it was probably only slightly thicker than his old flaccid penis had been. Still having something this heavy weighing down on his crotch got him quite excited. He started rubbing it's long shaft as it grew more and more erect. He figured his might as well change his girth while he did so and pressed down on the slider for girth. He slid it up and waited while his penis throbbed as it neared full mast. His penis, now fully erect standing an inch or two longer than a foot. in length. He looked at the screen.
"14.5' inches, damn, it's even making me feel light headed. Still, this thickness..." He glanced at the screen again. "Hrm, didn't I increase the girth?" He moved the slider for girth up again and stared at his massive tool. He noted no changed to his penis. "What the?" He slid the bar down for penis length, Again nothing. He almost punched the stall and grabbed his head in his hand. "This can't be real... fuck." he whispered to himself. He wanted to get up but his penis was still mostly erect and massive. He started rubbing it, half mad at what he'd done at himself, half in worry and half aroused as he was. He breathed heavily as he stroked the heavy appendage massaging it's length and caressing his tools head. It was quite flexible even when hard.
He quite quickly came. He felt his balls ache as they emptied themselves into his giant cock. He grabbed his penis at the base and just below the head and exhaled heavily as he came and came again. He managed to keep himself relatively clean as his penis subsided. Still huffiing a bit for air his penis mostly deflated to a more reasonable size. As he started to leave the stall, his phone's screen glitched, and the app detected both length and girth sliders being upped to their maximum. The display read "Your maximum erect length is 20.2 inches. Your maximum erect girth is 8 inches."
Just before he opened the stall door, Jake felt his package tightening again. He looked at the growing bulge, wondering why it was already getting hard, when he realized it wasn't getting hard, it was just growing.
Jake winced in pain and his underwear ripped. Out popped his 16 inch flaccid cock, which looked inhuman on his frame. He looked at it, and then his phone, where he saw the screen.