Smartphones and tablets are good alarm clocks, but these apps make them great.

There was a time when many items littered my nightstand. There was a lamp, a stack of books and comics I had every intention of reading, a point-and-shoot camera in case my dog climbed into the covers and did something adorable, and even a landline phone for those late-night calls that wake one with dread. Also, a back scratcher.

Today those items are gone, save for the lamp so I don’t stub my toe, and the back scratcher, because I still have a back. They’ve been replaced by my iPhone and its plethora of apps to keep me busy, including those that turn my smartphone into a kick-ass futuristic alarm clock.

Amid this collection for iOS () and Android (), whether phone or tablet-sized, features can vary wildly. But they all tell the time and get your butt out of bed in the morning. Or after a nap. Some do it gently, some do it harshly, some do it with new-age special effects, and some make you work to wake. Whatever you’re waking needs, you’ll find them here.