Happn

Another geolocation-based app aimed at meeting people you’ve crossed paths with in real life.

Happn uses GPS tracking to monitor its members and notifies them when they walk across one another.  

Users can like each other, though it remains secret until liking is mutual. And only in this case you are allowed to start a conversation, which can make you wait for too long before finally getting in touch with your crush.

Pros:

• Mutual opt-in style of meeting
• Localization privacy.

Cons:

• Little chance of coming across another user
• Duplicated matches
• Can’t start a conversation without mutual liking
• Incorrect notification service.