I could have made a few educated guesses about the right exposure time using the ND filter, but it was really helpful to have the Slower Shutter app to do that bit of thinking for me. Would it have been better if the Slower Shutter app could control the shutter too? Sure, but there are already plenty of ways to remotely trigger your shutter. This simple app did what it set out to do and saved me a bit of time in the process. Slower Shutter does have some room to grow, and one thing to keep in mind is that the countdown timer doesn’t work in the background if you switch apps.