Would be great to have a selection of sounds instead of the default ones.

e.g. start with 2:30 work/1:30 rest with -0:15 on work. Then next work interval is 2:15, then 2:00 and so on.

e.g. start with 2:00 work/1:00 rest with +0:15 on rest. Then next rest interval is 1:15 then 1:30 and so on.

This would be perfect for breath hold training.

Allow a user to add a music mp3, pause the music during rest period.

Choice of either a female or males voice, saying "ready.. GO" and "OK.. Break, thats [interval number]"

Another suggestion: display the time remaining in the work/rest interval, not just the total time.

after cooldown add an tickbox to repeat the entire routine, with an options of how many times. example - My routine is 10/15/5/5/50 **repeat 4 times**

I use it for circuit training. I have a circuit with 6 workstations (rounds). In each one I am 45'' working (work time), and between each one i have 15'' (rest time). When I finish the circuit i have 3' and I begin it another time. So the description of my workout is: [(45''-15'')x6] x2, with 3' between blocs. Sorry for my english. I'm a spanish physical education teacher. HIIT is an useful and fantastic aplication. Thanks.

It would be nice to have a virtual trainer pushing you and saying something like "come-on just 30 arcs left"

Eg: work, rest, work, rest. User selectable, so that you can have several work and rest routines during a round. Love this app and this function would really increase its usage.

It would be ideal to have a different sound for each phase - start prep, start work, start rest, start cool down, end workout.

Message sounds interrupts mp3 and spotify while media sounds just overlays and mixes into current stream. Personally I prefer media so I can listen to my favorite music, but maybe some ppl want the message type interrupts.

Great app, I use it daily. I really would like the ability to use any sounds Ive got stored in my phone. I workout in a loud gym, and the whistle is sometimes hard to hear even at full volume.