Professional and short brand name that plays both on the word "up" and "app".
The word "uppso" contains only five characters and only two syllables. Two syllable names make popular global brands. Two syllable names are used by established brands like YouTube, Gillette and Pocket.
Uppso.com is a dot com domain. Dot com domains are the most sought after domain extension in the world, used by famous websites like youtube.com. When you own a dot com, it is much easier to rank for your own name in search engines.