Block Time Calculator

Block Time adds and subtracts hours and minutes. That's all it does. It's meant for pilots adding up block, flight and duty time, or checking a logbook page before signing it. Digits fill in from the right, like an ATM: 4, 1, 5 gives 04:15. There's no colon key. Minutes carry over at 60, so 01:45 + 00:30 comes out as 02:15, not 01:75. What's in it: • A tape listing every time you've entered, with a running subtotal beside each one. Typed one wrong? Tap the line to fix it, or tap its + or − to flip it, and the total updates. • A history of finished sums, each with the working underneath. Tap one to start a new calculation from that total. • The total stays on screen after you press =, so you can keep adding legs. • Dark and light themes. No ads, no menus. One screen.