Measure Stroke rate
Measures a sample of 2 or more strokes and displays the measurement as strokes per minute.
Press any button or click on the blue area to start.
Keep pressing (or cliking) on each stroke.
The strokes will be counted and the average updated.
How to use -- Platforms
It should work on most mobile phones, tablets, etc.
It is just a webpage with javascript. So load the page and go rowing.
Many browsers allow saving of webpages, so they can be used when offline, i.e., Opera, the Blackberry browser.
I use it on an old Blackberry Bold because I like to use hardware keys.
Timeout after 5 seconds
The App
Is HERE