Baby moving less

21 w 4d. Anyone else find that the bigger baby gets, the less movement? I don't feel her moving quite as often as she did a few weeks ago. But when she moves, I definitely feel it. Just think she should move more than just a few times a day. She gets hiccups like twice a day. Maybe I'm just distracted and not paying attention. Is there a really good app for like a kick counter/timer I can use?