How long does leap 4 last?

I don't have money to buy the app or whatever and anything i look up you have to pay for.

The last few nights my little man has been extremely restless. Kicking, wiggling, whinning. Hasnt slept well. Crappy naps. Gets fussy easy. He has been fussy for a while. Maybe a week or so. Give or take. He will sit in his walker and exersaucer for a min but then starts crying. He gets bored easy. I can't seem to find anything to keep him happy. Any ideas or advice would be amazing.

Also, he is 4m, about 20w