Gymboss Interval Timer Instructional Video

Here's a great instructional video on how to use the Gymboss Interval Timer for timing circuit training, timing kettlebell training, you name it if it can be timed and its fitness the Gymboss will cover all these bases.

Gymboss Interval Timer App for iphone

If you don't have an actual physical Gymboss Interval Timer but do have an iphone, then the good news is that there is an iphone app for the gymboss interval timer and what's more it is available for zero cost

You can check out the Gymboss iphone app here

I don't really need to explain what is good about the gymboss but if you're unsure of what it can offer then, here is a gymboss interval timer review to assist you in deciding where you may go for iphone app or the physical product.

Also, here's a video review of another Interval timer iphone app