CalcKit

CalcKit brings common everyday calculators into one local-first app. Use the calculator, convert units, estimate discounts, split tips, compare percentages, and count days between dates.

Results and favorites are stored on your device. CalcKit does not require an account, app backend, cloud sync, or external calculation API.

Key features:

- General calculator with percent and parentheses

- Length, mass, volume, and temperature conversion

- Discount and optional generic tax percent calculator

- Tip split calculator

- Percentage tools for percent-of, share, and change

- Date difference in days and weeks

- Local history and favorites

- Privacy, terms, support, and notice links

CalcKit is for general reference and everyday convenience. It does not provide investment, tax filing, medical, legal, accounting, or regulated advice.