It's a Telegram client app for Sailfish OS.
Telegram, is a cloud-based instant messaging and voice over IP service. Telegram client apps are available for Android, iOS, Windows Phone, Windows, macOS and Linux. Users can send messages and exchange photos, videos, stickers, audio and files of any type. Wikipedia
Install from openrepos.
You also need our tdlib build (by mister) from build.merproject.org.
Download our latest build (by mister) from build.merproject.org.
To install it in sfos build engine ssh to it, then use sb2 to get onto it.
Assuming SFOS version 3.3.0.16 and tdlib version 1.6.0-1.2.2, as well as installing on both emulator and arm device.
# SSH into arm device, and install rpm
ssh -p 2222 -i ~/SailfishOS/vmshare/ssh/private_keys/engine/mersdk mersdk@localhost
sb2 -t SailfishOS-3.3.0.16-armv7hl -R -R
zypper install ./share/Downloads/tdlib-1.6.0-1.2.2.jolla.armv7hl.rpm
exit
# Install into build engine for emulator (i486)
sb2 -t SailfishOS-3.3.0.16-i486 -R -R
zypper install ./share/Downloads/tdlib-1.6.0-1.2.2.jolla.i486.rpm
exit
exit
# Copy over rpm to emulator (i486)
rsync -avzP --rsh='ssh -p 2223 -i~/SailfishOS/vmshare/ssh/private_keys/Sailfish_OS-Emulator-latest/nemo' ~/Downloads/tdlib-*.jolla.i486.rpm nemo@localhost:/home/nemo/Downloads
ssh -p 2223 -i ~/SailfishOS/vmshare/ssh/private_keys/Sailfish_OS-Emulator-latest/nemo nemo@localhost
pkcon install-local /home/nemo/Downloads/tdlib-*.jolla.i486.rpm
exit
git clone https://github.com/Mister_Magister/Yottagram.git
...profit