Apps like Behavioral Timer

Here are some great alternatives to Behavioral Timer by Expanded Labs :
Interval Timer: Tabata HIIT
Interval Timer: Tabata HIIT
★4.8
Seconds Pro - Interval Timer
Seconds Pro - Interval Timer
★4.3
TimerWOD - Interval Timer
TimerWOD - Interval Timer
★4.8
Interval Timer: Custom Workout
Interval Timer: Custom Workout
★4.6
Stopwatch & Countdown Timer
Stopwatch & Countdown Timer
★3.8
Interval Timer: Workout, HIIT
Interval Timer: Workout, HIIT
★4.8
BBQ Timer
BBQ Timer
★4.3
Simple Stopwatch
Simple Stopwatch
★4.4
Behavior Observation Made Easy
Behavior Observation Made Easy
★4.1
Interval Timer - HIIT & Tabata
Interval Timer - HIIT & Tabata
★3.8
Talking Stopwatch & Timer
Talking Stopwatch & Timer
★4.6
Timer Stopwatch App - Sound
Timer Stopwatch App - Sound
★4.8
Random Timer
Random Timer
★3.2
Timer and Stopwatch
Timer and Stopwatch
★4.3
FlatTimer - All timers
FlatTimer - All timers
★3.4
Interval Timer
Interval Timer
★4.9