For iOS

Step 1 - Add to homescreen

Tap the share icon, as pictured below.

Rangefinder app login screen on iOS device with URL and actions displayed at the bottom

Select "Add to Homescreen" from the list of actions.

iOS share overlay

Set name and URL if needed, then select "Add."

iOS add to homescreen overlay

Step 2 - Launch from homescreen

App icon on iOS homescreen

Step 3 - Click "yes" to notifications and then "Allow"

iOS notification permission overlay

For Android

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Step 1 - Add to homescreen

Android dashboard
Android share overlay
Android install app overlay
Android add to homescreen overlay

Step 2 - Launch from homescreen

App icon on Android homescreen

Step 3 - Click "yes" to notifications and then "Allow"

Android allow notifications overlay