Australian app Fitafy, which helps fitness-focused singles match based on their fitness levels and goals, has recorded 15 million swipes and 600,000 messages since it launched last year.
The app connected Port Melbourne couple Karla and Adam last year, leading to the pair moving in together in lockdown.
On their first anniversary this year, Adam popped the question.
"My mum always told me, when you know, you know, didn't take long after Karla moved in to know she was the person for me," he said.
Karla said lockdown really "solidified" their relationship.
"We learned so much about each other," she said.