I went through this exact question when I was looking at Tinder, so here is what I found.
If you only test one thing on the site, make it how visible the block and report controls are.
The most useful filter on the platform was recent activity, not distance, and it changed how the match quality holds up past the first day completely.
Where the app works it works fast; where it doesn't, what protection exists before you meet is usually the reason.
What I would look at, in order, for Tinder:
- How fast a report about Tinder gets a human response
- Whether the filters on Tinder hold after you reload the page
- Whether the Tinder match count moves when you widen the radius
- Whether Tinder shows you who has actually read a message
Has anyone got Tinder working properly outside a major city?