Cosmos 101

Cosmos 101 gives beginners a clean first pass at astronomy, and the title already signals that it is meant as an introductory education app rather than a specialist reference. By our assessment, its main strength is exactly that beginner angle: it can lay out basic space ideas without assuming prior knowledge. The obvious trade-off is scope, because anything framed as 101 will stay at the opening level and leave deeper physics, observation, and cosmology for other tools. In use, an app like this usually means short lessons, definitions, and guided reading more than active play. Compared with broader science encyclopedias, Cosmos 101 sits in the gentle, starting-point end of the field, and the number in the name makes that positioning hard to miss.