I’m looking an app that makes possible to have different suppliers for the same product. As same as "
If all the data you need is in your store then you don’t need an app, you could code this directly into the theme.
For example, say a product has 2 suppliers… if you have each product in Shopify with the correlating vendor for the product, then you could have a widget that gets all products and lists them with the vendor, price, etc.
By coding it directly into the theme you would save monthly cost + would not lose any performance of load speed that you may by installing a store facing app to do this.
If you need help creating custom features like this feel free to reach out to my team of professional Shopify developers at speedboostr.com/contact. We also build apps (https://apps.shopify.com/partners/speed-boostr), so could build an app if you need one but from the functionality you’re explaining a theme customization may be all that’s needed.