Free tools

Small calculators and checkers that answer one question each. They run in your browser, and each one belongs to the app that does the same job every day.

Nocturne

• Card Centering Calculator for PSA and CGC Grades

HydroNest

• Dog and Cat Water Intake Calculator, by Weight

Fennel

• FODMAP Reintroduction Schedule and Calendar

Jolt

• Infinite Tic Tac Toe Online: 3 Pieces, No Draws