Unsure. There is for SimpleX though which is the main messenger in the space now. Link below.

If you're wondering why SimpleX over Session I wrote a breakdown on Nostr a bit ago I can dig up for you if you're interested.

simplex:/contact#/?v=2-7&smp=smp%3A%2F%2FenEkec4hlR3UtKx2NMpOUK_K4ZuDxjWBO1d9Y4YXVaA%3D%40smp14.simplex.im%2FrlQCcgTnsq7fqYIHvUTjSZ4sJS7SwwUu%23%2F%3Fv%3D1-3%26dh%3DMCowBQYDK2VuAyEAzpnTnbysyqEpIulI7Vz0xmkLUkMeoM6IFXF71c0jYVE%253D%26srv%3Daspkyu2sopsnizbyfabtsicikr2s4r3ti35jogbcekhm3fsoeyjvgrid.onion