PNG and JPG supported. The maximum and recommended size for screenshots is 1280x800 pixels. 640x400 pixels is a good alternative if you only have smaller images. Having screenshots in your listing page greatly increases its chances of being installed and being featured in the homepage.
Yekoch' ri PNG chuqa' JPG. Ri nïm kipalem chilab'en kichin taq chapoj ruwa ja ri 1280x800 piksel. 640x400 piksel ütz we xa xe ko'öl taq wachib'äl k'o awik'in. We ye'ayäk taq chapoj ruwa pan ruxaq ak'amaya'l, xtab'än chi xtiyak chuqa' xkeya' pa ri tikirib'äl ruxaq.