NDA workout consists of a stopwatch and a workout handler.
The stopwatch is a general purpose counter featuring upwards and downward counting, playing tick sounds with specific rate, warning sound before counting end and final alarm sound . Every sound and interval settings are customizable.
The workout handler allows you to define complex workout sessions, mixing interval steps and sequences of steps. Each step is fully customizable: you can set the number of repetitions, the tick sound at specific rate, the warning sound before counting end and the final alarm sound. Every sound and interval settings are customizable. Sequences consists of a list of steps with repetitions.
Some helper commands are implemented to create, edit, clone, delete workouts, sequences, steps.

You can buy the PRO version directly from the application purchase page. The PRO version removes ads and unlocks extra features as parameters.
Parameters allows you to define a workout and to customize it at execution time (e.g. changing a repetition number, an interval value or a sound) without changing the workout definition.
Much more features are coming in the next releases of the PRO version.