Yes I did. It adds cost to the frame but it works well! I use the Witty Pi.
A good source for it is here:
It works well. I tried solutions without it by putting the wifi interface in sleep mode and throttling down the cpu… and waking and throttling up on a regular interval set in a configuration file, check for new emailed photos, display the next photo and throttle down again, but I didn’t really see the power savings that I wanted. I wanted to stretch the battery life to one month. The Witty Pi will get it done. It’s got an onboard rtc, it will power up the picture frame at a set interval. At the moment I have the witty pi power up the frame at 5am, after the frame checks for photos and displays a new photo, the frame will shutdown until 5am the following day.