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Add to your home screen

• iPhone or iPad: open this site in Safari, open the Share menu, then choose Add to Home Screen. The option can also be available in other iOS browsers.
• Android: use the Install button when offered, or the browser menu’s Install app / Add to home screen option.
• Desktop: look for the browser’s install icon or install option. On supported Safari versions, use File → Add to Dock.

Options vary by browser. Installation is optional; all features also work in a regular browser tab.

What works without a connection?

The six free calculators are saved after offline setup completes. They calculate on your device. The installed app opens the licensed workspace when online, and shows the offline calculator menu if it cannot connect.

The licensed workspace and activation are never stored as offline pages. A connection is required when opening the workspace so your entitlement can be checked. If you lose connectivity while a loaded workspace is open, keep it open and export a backup before closing it.

Keep a copy of your projects

Installation does not create cloud storage or synchronize devices. Browser storage and an installed app may be separate on some platforms. Export a project before switching, then import it in the installed app if needed. Clearing site data can erase projects and offline tools. Read the backup and recovery guide.

Offline copies can become outdated or be removed by your browser. Reconnect to receive the latest version. Updates do not force a reload while you are editing.