lietotne

Etymology
From.

Noun

 * 1)  application, app, applet software that runs on computers, tablets, smartphones and similar devices and is perceived by the user as a tool for some specific purpose

Usage notes
(or, more officially, ) is the "correct" or "standard" term. The synonym is considered "incorrect"; in fact, it was even jokingly elected in Latvia as   ('non-word of the year') in 2014.