Calcum History Pro

Calcum History Pro is a scientific calculator built for users who need more than basic arithmetic. Every calculation is automatically saved to a searchable history log so you can look back, review, and reuse previous results without retyping anything.

The calculator includes a full extended numpad with trigonometric functions (sin, cos, tan and their inverses), logarithmic operations, powers, roots, factorial, and more. Whether you are a student working through math problems, an engineer doing quick field calculations, or just someone who needs a reliable tool, the interface stays out of your way and lets you focus on the numbers.

History entries are stored locally on your device. No account, no sync, no cloud — your data stays with you. You can search through past calculations using keywords or values, making it easy to find a specific result from earlier in the day.

The app includes a 4-digit PIN lock for privacy on shared devices. A handful of settings let you adjust font size, choose between 12-hour and 24-hour time format, set your preferred date format, pick which tab opens on launch, and configure the first day of the week for any date-related display.

Everything runs fully offline. No registration, no paid upgrades, no subscriptions, no ads.