Tally — Sidebar Calculator with History

About

Tally — Sidebar Calculator with History is a browser extension for people who want a fast, always-available calculator without leaving the page they are on. Open it instantly in the side panel, run quick math or full scientific expressions, and keep working without switching tabs, opening a separate app, or losing your place.
Whether you are studying, doing finance and budgeting, writing code, shopping, or just need a quick number, Tally lives right next to your content and stays out of your way. It opens with a single shortcut and is ready the moment you need it.
What makes Tally different is its memory: every calculation is saved automatically and organized by date, so your history is still there even after you close the panel, restart the browser, or come back days later.
Key features:

Calculator built into the Chrome side panel, always one click away
Opens instantly with a keyboard shortcut (Ctrl+Shift+L / Cmd+Shift+L)
Permanent history that persists across sessions — nothing is lost when you close it
Full history organized by date (Today, Yesterday, and earlier), with timestamps
A live, scrollable history tape right on screen — scroll back through everything you calculated
Live result preview as you type, before you even press equals
Simple mode for fast everyday math
Scientific mode with sin, cos, tan and inverse functions
Square root, powers, factorial, percentage, logarithms (log, ln)
Constants like pi and e
Parentheses and full expression input
Degree and radian support with a clear angle marker
Tap any past calculation to reuse it, or copy results to the clipboard with one click
Light and dark themes
Choose your default mode (simple or scientific)
Clean, compact interface that fits the side panel
Works entirely on your device — your calculations stay local and private

Why users choose Tally:

A calculator with real memory — your history is always there, organized by date
Fast access without leaving your current tab
Stays open beside your work instead of floating on top of it
Clean, distraction-free layout
Handles both quick math and serious scientific expressions
Reusable history so you never retype the same calculation

Great for:

Students and teachers working through scientific problems
Developers and analysts who need quick math while they work
Finance, budgeting, and shopping calculations on the fly
Anyone who wants a calculator that is always one shortcut away
Users who prefer the side panel over separate calculator apps or tabs