The iPhone camera's built-in timer function allows you to set the timer for 3 or 10 seconds. When the timer goes off, it takes one photo or shoots ten quick photos in Live photo mode.

On Windows 11, you can use the Clock app to manage time with alarms, timers, and you can even use a stopwatch. In this guide, I'll show you how.

You may have a resolution of 1ms but an accuracy of 20ms. When it comes to profiling, the general rule is to make your timing loops large enough to amortize any timer inaccuracy over a long period.

As above mentioned, Instagram has no in-built feature to set timer while capturing selfies using Instagram's camera. However, the app allows you to set timer for Reels.