Grow your tiktok

I came across this app Social Media Boost - Chrome Web Store and was wondering if it actually works for growing TikTok accounts.

It says you earn credits by engaging with other videos, then use those credits to boost your own posts and get more views/likes.

It sounds kinda like those Instagram engagement apps, but I’ve never seen anything like it for TikTok before.

Has anyone tried something like this or knows if it’s legit or useful?