SeniorMatch is free to register and has a budding community of users. CougarFling does, however, a much better job of laying out the site and making it easy to use, yet has so few members—most of whom live in the US—that it's barely worth your while to sign up. But, considering the high number of women, young men will find it easier to date on this website, so it is worth making the investment.
My friends advised using the app Bumble. Yes, better. Only a few stay, and those few seem to serve their members right, but even still, as humans, we would like to use only the best of the best, hence the annual quest for the top dating apps.