Features* 1-to-1 audio and video calls* Encrypted end-to-end messaging* Encrypted end-to-end file transfers* Synchronization of multiple devices * Multiparty conferencing* Call history entries management* Native address book lookup* Native OS telephony integration* Support for multiple devices in parallel* Support for multiple cameras* Support for landscape and portrait modes* Support for tablets and phones* Interoperable with SIP clients* Receive calls from the web* Support for Self Sovereign Identity (SSI)Sylk Mobile is part of Sylk Suite, a set of real-time communications applications using IETF SIP protocol and WebRTC specifications. With it you can call to any other SIP address and you can receive calls from SIP applications and WebRTC browsers. The source code is available at https://github.com/AGProjects/sylk-mobileThis project was funded through the NGI0 PET Fund, a fund established by NLnet with financial support from the European Commissions Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 825310.