Still a little suspicious of the app he decides to just target himself for now. When he got to time period drop down menu, he decided to select current, although prehistoric was pretty tempting. As for when he got to evolutionary tree, a slider bar appeared under his photo with 'Protazoa' on one end and 'Current' on the other. The bar was all the way to the right. He started moving it to the left and was startled to see his picture change. At first it was his hair style, then some subtle changes to the shape of his head and nose. About a quarter of the way to the left, his forehead began to sink in, and his features got a little coarser. Darker? He stared at the image and decided he looked more mature, but not older. More to the left, and changes got more drastic. His chin receded and his head shape sank, until it was him as a Neanderthal! Lance didn't even need to look at anything else. He was almost mesmerized by how he would look like as a caveman. His hair down past his shoulders, incredibly muscled and was well endowed. He then set the timer for 30 minutes. He then noticed that both physical and mental were checked and decided that he wanted to keep his mind, he unchecked mental. Just as he was about to hit de-evolve, he thought that it would be a better idea to do this outside. Luckily sneaking out wasn't much of a problem.
Once he was a good distance away, he then hit the de-evolve button. A loading icon then appeared. At the same time he felt something start to build inside. Suddenly his clothes felt tighter. His sleeves were gone, his shorts were pretty crowded and his feet completely tore out of his shoes. Lance took a few steps forward almost instinctively and then felt his new bicep.
"Wow." Lance managed to get out
Not long after, the changes started up again. His hair started to grow out, his muscles turned his shorts into a speedo and his shirt turned into a tank top revealing a four pack abs and his face starter to look older.
"So cool" Lance said in a deeper voice as he flexed his now bigger biceps.
As he felt his face, he immediately felt his nose had grown bulbous and big, he now had some facial hair; while his lips thickened and pushed forward into a permanent pout. Lance then smiled knowing that the last change was about to happen. His muscles grew tore out of what was left of his clothes revealing an 8 inch soft cock and him gaining two more abs. As Lance was enjoying the last of his humanity leaving him, his jaw jutted out and his formerly pearly-white teeth changing into something that reminded him of the time he saw a chimpanzee snarl in the zoo. His spine curved, followed by his arms lengthening with more muscle whereas his legs shortened a little in the process.
"DE-EVOLUTION COMPLETE!" the phone said still in Lance's hand
Lance was certainly surprised to see his phone was still intact. He then saw a timer showing how long it would be until he changed back. He immediately hides his phone and what little remained of his clothes under a bush so no one would think anything happened to him. He then took off into a run looking forward to seeing everything for the first time as a caveman.