What's a decent Android app for reading manga when I'm stuck on a job site with zero internet?

Look, I needed something to kill time during lunch breaks where the only signal I get is from passing satellites. '漫畫集' actually gets the job done. It lets you download a bunch of manga chapters, so you can read 'em even when you're completely off the grid. The tutorial is useless, no BS, but once you poke around, it's straightforward enough. Battery life seems okay so far, haven't had it die on me mid-chapter yet. The interface ain't pretty, but it's functional – works even with gloves on, which is a plus. Survived three drops already, so it's built tough enough for a job site. Rain doesn't stop it either, though I try to keep my phone dry-ish. It ain't perfect, but it's a solid option for offline reading.