If you want the full version and license for commercial use,
you can purchase here :
https://staircaselab.com/product/calistin/
File Font Version :
1. Calistin.otf
2. Calistin.ttf
3. Calistin.woff
4. Calistin Italic.otf
5. Calistin Italic.ttf
6. Calistin Italic.woff