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Undertone

Offline voice chats

iOS
Messaging
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Hunted byKevin ChauKevin Chau

Loud restaurants, airplanes, festivals. Maintain a voice chat with your group. No internet or access point required. Everything is offline and P2P.

Top comment

My wife and I were eating at Canje in Austin a few years ago, and the restaurant was so loud that we couldn't even talk with each other even though we were sitting at a small table. I've always wanted to figure out a better way than just using earplugs, and this is the start of that idea.

Comment highlights

How does it actually pair everyone's phones together without any kind of central hub, and is there a cap on how many people can be in the same group chat?

Used it on a flight last weekend and it actually held up, even with three of us tucked into a noisy cabin. The P2P setup feels almost magical for something that needs zero signal.

how does the peer to peer connection actually work across all those noisy environments, like does it need bluetooth or some kind of mesh setup?

How does the peer-to-peer connection actually work across iOS and Android without any access point or internet, especially when phones are on different cellular networks?

About Undertone on Product Hunt

Offline voice chats

Undertone was submitted on Product Hunt and earned 7 upvotes and 9 comments, placing #102 on the daily leaderboard. Loud restaurants, airplanes, festivals. Maintain a voice chat with your group. No internet or access point required. Everything is offline and P2P.

Undertone was featured in iOS (110.5k followers) and Messaging (51.9k followers) on Product Hunt. Together, these topics include over 50.6k products, making this a competitive space to launch in.

Who hunted Undertone?

Undertone was hunted by Kevin Chau. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.

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