Timer+ Pro unlocks the full app experience—no ads, no limits. With Pro:
Create and use unlimited timers
No ads, ever
Use all your timers in Shortcuts (e.g., Start/Open Timer)
Access all timers in widgets
See all active timers in the widget and Apple Watch app
The free version gives you full feature access, but includes ads, limits how many timers you can have, and limits how many timers appear in Shortcuts, widgets, and on your Watch.