fun fact: the app was built by HN user grishka, who previously worked on VK and Telegram Android clients. He’s got upset with the state of social media and turned to Mastodon/ActivityPub

He's also the creator of Smithereen. "Federated, ActivityPub-compatible social network server with friends, walls, and groups". It is modeled after VK and federates with Mastodon.

https://github.com/grishka/Smithereen