What's a good iPhone app for keeping track of my student workers at the after-school program? Something where I can see their hours and make sure they're getting paid right?

So, I've been wrangling the student workers at the after-school program, and keeping track of their hours was a real headache. Paper timesheets? Forget about it! My students showed me this Homebase app – they use it at their part-time jobs. It took me a few days to figure out all the features, and why do they hide the settings button there?! But once you get the hang of it, it's like having a teaching assistant in your pocket. I can schedule them, they can clock in and out on their phones, and I can see it all right there. It even calculates their pay, which is a lifesaver. I still double-check everything, of course, but it's cut down on the time I spend on payroll by a good bit. It's not perfect, mind you, but it's a heck of a lot better than what I was doing before. Plus, it helps me make sure everyone's getting their fair share. And honestly, if even I could figure it out, anyone can.