Hey @AudreyZhang ,
I saw that you are looking for good apps to build a BFCM sale page.
We have developed ModeMagic to help you solve that problem. It is a Shopify app that helps merchants to boost their sales during the holiday season/BFCM season and is trusted by 10K+ merchants all over.
No complex edits and no back & forth with designers. You can update your store within seconds!
Check out ModeMagic here.
Hope this was helpful.
Good luck!