What you want to search for is “interval timer”. I’ve used this one in the past, but there are a lot out there. https://apps.apple.com/us/app/interval-timer/i

What you want to search for is “interval timer”. I’ve used this one in the past, but there are a lot out there. https://apps.apple.com/us/app/interval-timer/id1327053127 https://apps.apple.com/us/app/interval-timer/id1327053127