SIGLINK - Offline Messenger
Off-grid encrypted messenger
About
Communicate securely with others nearby, even without an internet connection. Messages can hop between devices to extend reach, and end-to-end encryption ensures privacy. It's ideal for events, outdoor activities, or areas with no network coverage.
What's New in SIGLINK
1.0
November 5, 2026
Subscriptions & In-App Purchases
$9.99
Extended Reach
Messages travel up to 255 hops instead of 64.
Developer apps
FAQ
How does SIGLINK work without internet?
SIGLINK uses direct peer-to-peer connections over Wi-Fi and Bluetooth between nearby iPhones and iPads. Messages can be relayed through multiple devices to extend the communication range, creating a mesh network.
Is SIGLINK secure?
Yes, SIGLINK offers end-to-end encryption for all messages, photos, and voice notes. Only the sender and intended recipient can read the content, as relaying devices and servers cannot access it.
What is the range of SIGLINK?
Direct range between two devices is typically 30 to 100 meters, depending on the environment. Each relaying device extends this range, with a standard mesh supporting up to 64 devices and an optional purchase extending it to 255.
Can I make calls with SIGLINK?
Yes, SIGLINK supports voice and video calls. These can be made directly with people nearby or over the internet when a connection is available.
Does SIGLINK have ads?
SIGLINK is ad-free, allowing for an uninterrupted communication experience. The app is free to download and use, with optional in-app purchases for extended features.
What devices are supported by SIGLINK?
SIGLINK is available on iPhones and iPads. It requires iOS 13.0 or later and is compatible with both devices.
How do I add contacts in SIGLINK?
You can invite friends with a link or check which of your contacts use SIGLINK if you choose to share that information. Contacts can also be added by scanning their unique SIGLINK code in person.
What is the Extended Reach feature in SIGLINK?
The Extended Reach purchase allows messages to be relayed across up to 255 devices, significantly increasing the communication range for very large crowds or spread-out teams. The standard mesh supports up to 64 relaying devices.