Multi Timers 2.4 was just released with full support for iOS 10.
The today widget is now adapted to the new design in iOS 10, and you can restart or stop timers right from the widget without launching the app. Additionally you can now launch the app right into editing a timer from the widget.
Support for Siri: Just say “Start
The Apple watch app now supports watchOS 3, and works as a standalone app. You can add, remove and edit all timers right on your watch.