What's a good Android app for keeping track of project costs and materials when I'm out on a job site?

Look, I've tried a bunch of these fancy project management apps, but they're all fluff. Excel on my phone? That's actually rugged. I can punch in numbers, track my lumber costs, and even calculate payroll right there on the tailgate. The tutorial is useless, but once you figure it out, it's like having a mini-spreadsheet right in your pocket. Plus, it's Microsoft, so it plays nice with all the stuff back at the office. Battery life ain't the greatest if you're using it all day, so I keep a power bank handy. Rain doesn't stop it either, unless you're an idiot and leave your phone out in a downpour. Still, it's built like a brick house compared to some of these other apps. Gets the job done, no BS.