3Fun Review

We tested 3Fun and it sits in a specific lane: a mobile-first dating app designed explicitly for threesomes, couples seeking thirds, and people in polyamorous or swinger arrangements. Launched in 2017, the app claims over 1.5 million users globally and is one of the few mainstream apps where the threesome use case is the primary feature rather than a filtered checkbox buried in settings. Here's the thing about the core mechanic: 3Fun uses a matching system that accommodates couple accounts - two people can share one profile and swipe together or separately. That's a genuine structural feature that general dating apps like Tinder don't support. A couple can browse solo users, other couples, and single users can filter specifically for couples. The app actually models the three-way dynamic at the account level, not just the preference level. Pricing runs about $29.99/month for premium, with a free tier that allows profile creation and limited matching. The free tier restrictions are significant - you can see that matches exist, but messaging and viewing profiles fully requires premium. This is a hard paywall for actual use. Real talk about user base: 1.5 million global is not a huge number for a dating app. Outside of major metropolitan areas in the US, UK, and Australia, active user density drops noticeably. Reviews from smaller cities consistently mention few available matches. The app works best in New York, Los Angeles, London, Sydney, and similar population centers. Fair warning: 3Fun had a significant security incident in 2019 when a researcher found that the app was exposing precise real-time GPS coordinates, photos, and birthdates of all users without authentication. The company patched this, but it's worth knowing the history before trusting precise location data to the platform. The app has a strong filtering system for preferences - open relationship type, relationship status, what you're looking for - which reduces the noise of explaining your situation in openers. If you're in a non-monogamous structure and tired of doing that explanation on every match, 3Fun's explicit framing handles most of that upfront.