Yes, I agree with twolovers. Bettas can go weeks without food so a little weekend won't hurt. Also the automatic feeder part is VERY true. The food can sometimes not work and end up overfeeding your betta. Just do a water change just in case. Better to be safe than sorry.
Over hundreds of bettas die in their small, dirty cups each day. Only you can help them live. Research and then save them, today!