Action toolbars work differently across platforms. On iOS, toolbars appear at the bottom of the screen. They're non-customizable, become translucent when content appears behind them, and contain buttons for screen-specific actions like creating, filtering, or editing content.^[1]

On Android, the bottom app bar serves a similar purpose but offers more flexibility:

• Holds up to 4 icon buttons
• Includes a floating action button (FAB) for primary actions
• Can change the layout and contents between screens

Both components help users access key actions while conserving screen space, though Android offers more customization options than iOS' fixed toolbar design.^[2]