No need for the person with asthma to end up on a date with a chain smoker.
There are sites like Our Time that focus on singles over 50 and lots of sites that focus on different religious groups, including Jewish dating sites like Yenta and JDate.
There are also sites dedicated to specific racial and ethnic groups, like Latino People Meet.
Search Tools Each person values different things, but if you know you are not compatible with anyone under or over a certain age, for example, you can filter for that.
The best services allow you to see things like how often people log onto the site.
Some dating services develop their own compatibility tests that use algorithms to match potential couples.
There will always be a few bad apples who do not fill out the questionnaires honestly, for various reasons, but if you find even a small handful of compatible people it could be worth it.
You may be too busy to find dates in the traditional ways.
With the best online dating sites, you have a lot of the preliminary questions out of the way already.
Whether or not you believe in fate, it can certainly feel like fate when you meet the love of your life.