Sankalp

Keeping a sankalp is free. Each day you keep fills one mala bead.

If you miss a day it is fine, and that bead stays empty. The app never says your sankalp failed.
You can write a mannat at the start of your sankalp, if you wish.
When your sankalp is complete, you can have the Sankalp Purnahuti Puja done in your name.