How to make product/collection filter app?

Technical Q&A
1

How to make product and collection filter app similar to https://apps.shopify.com/product-filter-search

Where I can add filters using Shopify app.

Any relevant tutorial and guide?

Thank You

2

Shopify just updated the filter and you can use it without having to install any app. It will save you a lot of cost instead of installing app.
Refer https://shopify.dev/themes/navigation-search/filtering
If you have no coding experience, you can hire a professional, it will cost less when you install the app for $19/month
Hope it helps!