Calculates how much Exp you need to get from level X to level Y and, depending on input Exp per day, how many days it will take to get there. Data from: https://github.com/aizawey479/ba-data based on JP but it is the same for Global.
https://sensei.lol/expcalc.html
Update 02/05/24 - Added levels 88-90 for JP
Calculates the amount of relationship/bond EXP is needed from level X to level Y, the amount of each gift type needed for that (plus wasted exp), and a rudimentary backpack calculation of the optimal gift path.
https://sensei.lol/bondEXPCalc.html
Update 10/11/23 - Added excluding 3* gifts