Cumulative Calc
A Line-by-Line Adding Machine
Calculator
Keyboard Shortcuts
- + − × ÷ Set operator
- d Delete current row
- Enter New / next row
- ↑ ↓ Move focus up / down
- Ctrl + ↑ ↓ Reorder current row
Tips
- Swipe a row left to delete
- Drag the handle to reorder
Install App
- Tap the Share button in Safari
- Scroll down and tap Add to Home Screen
- Tap Add
Opened from another app? Open this page in Safari first, then follow the steps above.
- Tap the ⋮ menu button
- Tap Add to Home screen
- Tap Add
Click the Add to taskbar button — a box with a down arrow at the right end of the address bar. The page reopens in its own window, pinned to the taskbar with a Start menu shortcut.
No down-arrow button? Turn on Settings → Firefox Labs → Add sites to your taskbar, then reload.
Firefox on Mac and Linux can't install web apps yet. Open this page in Chrome or Edge and install from there, or simply bookmark it here.
In Safari's File menu, choose Add to Dock (macOS Sonoma or later).
Click the install icon at the right end of the address bar, or open the ⋮ menu and choose Install.
Some privacy-focused browsers remove app installs; plain Chrome or Edge always offers them.
Look for Install app or Add to Home Screen in your browser's menu.
Rotate your phone to portrait to use Cumulative Calc.