Review my web app

Few months back i created a mini single page webapp for time-zone conversion it is PWA built on next-js. Recently i added live-clock for that. My plan is to add Alarm, Countdown timer in future. Can you review the site and suggest me any changes or feature to improve my web app so that i can make it more useful for an user.

Github: https://github.com/saketh-kowtha/time-zone-converter
App URL: https://timefull.app/

You can also post in github issues: https://github.com/saketh-kowtha/time-zone-converter/issues.

Cheers!
Happy coding.