Free version only holds 3 events

Got the app. Was told I had to upgrade to put in more than 3 events, but it doesnt say how much it costs to upgrade so Im afraid to upgrade. Will be deleting. Also, stupid game comes up whenever I click the hamburger icon and you cant close it till you make three moves in the game.

HD the BD about Countdown App Free (Big Day Event Timer Reminder), v3.4