Have you tried Swim Plan

I like the idea better than the execution. It gives you the option to customize workouts for strokes and pool toys, so if you want a workout that uses fins and has backstroke but not breaststroke, you can do that. However, the customizing really looks like an afterthought - if you add backstroke to a workout, the site just seems to take a freestyle interval and tells you to do back instead, adding a couple of seconds per 50 to the workout time. And the non-free stroke tends to be in the warm-up or cool-down, not during the main workout, at least in my experience. Also, I like the idea of recording and tracking your times on the site. However, you can only record times for one stroke, as far as I can see. I'd like to record times for several strokes. I'd also like to be able to record times for customized workouts, like kicking sets. I still use it when I need to find a half-hour workout fast.

I like the idea better than the execution. It gives you the option to customize workouts for strokes and pool toys, so if you want a workout that uses fins and has backstroke but not breaststroke, you can do that. However, the customizing really looks like an afterthought - if you add backstroke to a workout, the site just seems to take a freestyle interval and tells you to do back instead, adding a couple of seconds per 50 to the workout time. And the non-free stroke tends to be in the warm-up or cool-down, not during the main workout, at least in my experience. Also, I like the idea of recording and tracking your times on the site. However, you can only record times for one stroke, as far as I can see. I'd like to record times for several strokes. I'd also like to be able to record times for customized workouts, like kicking sets. I still use it when I need to find a half-hour workout fast.