Works with no signal at all

Messages that don't need the internet.

Isolink sends end-to-end encrypted messages straight from phone to phone over Wi-Fi, a hotspot or Bluetooth. No servers in the middle, no phone number, no account to sign up for.

Free while in beta. Android 7 or newer, Wear OS 3 or newer, or any modern browser.

0servers reading your messages
3ways to connect: Wi-Fi, hotspot, Bluetooth
7 daysa sealed message can wait for its reader
25 MBphotos and files, encrypted end to end

Everything a messenger should be.
Nothing it shouldn't.

๐Ÿ“ก

Offline first

Finds the people around you on whatever link there is: the same Wi-Fi, a phone's hotspot, or plain Bluetooth. Festivals, flights, trails, blackouts.

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End-to-end encrypted

Every message and file uses X3DH and the Double Ratchet, the design Signal uses. Forward secrecy, and it heals itself if a key ever leaks.

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Hops through friends

Out of range? Sealed copies travel with trusted contacts and are handed over when they meet. Relays can't read, change or forge a thing.

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Hidden by default

Your phone broadcasts nothing that identifies you. Only your contacts can spot you nearby, unless you choose to be visible for 15 minutes.

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Phone, watch and web

Link a Wear OS watch or a browser to your account. Each device has its own keys, and what you read on one is read everywhere.

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Everything you'd expect

Groups, photos and files, voice-to-text replies on the watch, reactions, polls, contact cards, read ticks and typing bubbles.

How a message finds its way

  1. You

    You write to Alex. Isolink encrypts it on your phone, for Alex's devices only.

  2. Nearby

    If Alex is in range, it goes straight there over Wi-Fi or Bluetooth.

  3. Friend

    If not, a sealed copy rides along with a mutual contact for up to 7 days.

  4. Alex

    When they meet, it's delivered, and an encrypted receipt finds its way back.

Get Isolink

Google Play

Automatic updates through the Play Store.

Isolink is on its way to Google Play. Until then, the APK gets the same app.

Coming soon toGoogle Play

Wear OS

Chats, quick replies and dictation on your wrist.

  1. Download the watch APK on a computer.
  2. Turn on ADB debugging on the watch, then run adb install isolink-wear.apk.
  3. Open it on the watch and scan its code from your phone.
Watch APK

Web

Isolink in any browser, linked to your phone.

  1. Open the web app.
  2. On your phone: You โ†’ Devices โ†’ Link a device, then scan.
  3. Keep Isolink running on your phone; it carries the browser's messages.
Open web app

Questions

Does Isolink need the internet?

No. Phones talk directly over Wi-Fi, a hotspot or Bluetooth. The only part that uses the internet is the optional web app and a watch away from your phone, which reach your phone through an encrypted relay that can't read anything.

Who can read my messages?

Only the people you send them to. Messages are encrypted on your device and decrypted on theirs. Relaying friends and the web relay only ever see sealed, padded data.

How do people find me?

Add each other by scanning a QR code, or from the Nearby list while one of you is visible. There are no phone numbers or usernames to look up.

What about iPhone?

Not yet. iPhones don't allow the background Bluetooth links Isolink relies on, so it's Android first. On an iPhone, you can use the web app linked to an Android phone.