3Fun
Pros & cons.
Worth it for
- Free messaging is genuinely usable — you can match and chat without paying, which is unusual for a hookup-intent app where the inbox is normally the paywall
- A real, large niche audience built specifically around threesomes, swinging and non-monogamy, with couple and paired-profile accounts as a first-class option rather than a workaround
- Clean, familiar swipe interface with working video calls and a profile screenshot-block — first-hand it's one of the easier niche apps to actually use day to day
Watch out for
- Documented security failure: a 2019 study by Pen Test Partners found the app exposed users' real-time location, photos, chat and private data, and the researcher described it as among the worst app security he had seen. 3Fun said it patched the issues at the time; we have not independently re-verified the fix, so we treat its security as unproven rather than cleared and grade it down on that basis
- Fake and recycled profiles are a recurring complaint, and the upsell pressure is heavy — instant matching, unlimited likes, incognito mode and location change all sit behind a steep paid tier
- The pool thins fast outside dense cities — in major metros the daily feed is workable, but the niche makes the drop-off sharper than a mainstream app at the same address

