Drop: Exchange Contacts

Seamless, cross-platform exchange. NOT another 'bizcard app'

Drop: Exchange Contacts is NOT "another business card app." Drop is a communication tool that facilitates the seamless exchange of contacts quickly and effectively, on par with the traditional paper business card user experience. This is achieved through a proprietary crossplatform device pairing technology and enhanced OCR.

Would you recommend this product?
14 Reviews5.0/5
Very cool idea to use the microphone! I had a couple of thoughts while watching the video: - The way I understand it, you are pairing the phones via Resonance, but then sending the actual info over cell data or wifi. Is that correct? - What keeps strangers from connecting to you and sending you something without your permission? - What level of encryption do you use on information being exchanged? Thinking about this particularly for payments. - Is the "fingerprint" unique to each new pairing with another person, or does your device have one static fingerprint?
@nneuman Hi Nick, thanks for your questions. – the audio fingerprint is matched in a cloud. This requires at least some connection, but Resonance works even if you have Edge. – the user interface of the application allows you to choose who to send your contacts to and who to receive information from. – Resonance SDK only has access to the ID of the device which you use. information is sent through the application that uses Resonance and according to its security measures. For more information see docs.getresonance.net. – the 'fingerprint' is unique to your audio environment and the person you connect with. Every time you initiate Resonance, each device generates short 'fingerprints' based on their ambient noise. We use perceptual hashes which allows us to find devices with a similar audio environment.

Used it on Android predominantly. Don't see a need to order myself a pack of personal bizcards for events. Will save me 100$ at least.


I can make several business cards for different occasions, they can be branded. Exchange is easy with just a button tap. Slick design!


I didn't find a better alternative with such easy way to share my contacts

Thank you very much for your feedback Andrey! I hope you enjoy our product as much as we do!

Its the only realistic alternative to paper business cards. Works great and allowed me to finally stop hoarding paper cards. *DROP mic*


Not just a contact manager, DROP lets you exchange contacts with anyone you meet. Free to use)))


Would be cool if everyone used this instead of paper business cards.

You are just take a photo of paper card and all done! That's cool! Nothing more to describe!


It's easy to use!


I think it's very useful app for the fast exchanging contacts!

Standing ovation 👏🏻👏🏻 This was one of the most useful and most searched/needed app to sync contacts and share it😊 @mdisc0rd
@ayush_chandra Thank you so much for your feedback! We're really glad that we have created something that makes your life that much easier :)