This one's not bad - https://apps.shopify.com/free-watermarks?surface_detail=sticker&surface_inter_position=1&surface_int.... Have you tried it?
If that one doesn't fly, this one's OK-ish, but I wouldn't rush to use it unless the first one is really not a good fit - https://apps.shopify.com/product-sticker?surface_detail=sticker&surface_inter_position=1&surface_int....
If both do not fit your needs, I'd say some custom work is needed. Ping me and I'll see if I can help.
Julie here from Shopify Support.
It looks like @Red_Cap_Tom was able to share some great options for you. Another similar app I recommend checking out is Flair Badges, Banners & Labels. Like the others, this app will allow you to add badges to any product and specifically offers you the ability to add a "Save %" badge. Other types of sales badges you can add include "Limited Edition", "New Arrival", "Only x Left!", "Free Shipping", and more. If you'd like to see how this would look on an actual store, you can do so by clicking the "View example store" button on the app page.
It sounds like this app would be a great fit for you and can definitely help boost sales. This app is pretty popular and also has some great reviews; I recommend installing it to see if it's a good fit for you. Just keep in mind that if you decide not to use it, you will need to uninstall the app from your store prior to the free trial expiring so that you aren't charged. If you ever need help with any third-party apps, you can always reach out to the developers directly via the Support section on their app page.
Aside from an app, you can add this through custom code. If you decide to go this route and you're not too familiar with custom code, then hiring a Shopify Expert or taking @Red_Cap_Tom up on their offer would be another option.
I hope this leads you in the right direction! Let me know if you have any further questions.
Hey @Julie! Awesome to see the Shopify people stopping by - didn't know that one (it's quite new - only been launched a few weeks ago!).
Just in case you didn't find a solution for this yet,
I recently launched an app on Shopify which allows you to apply labels on your products.
You can use labels such as trending, bestseller, sale, new, etc on your product images using this app. Labels would help you highlight certain products and let your customers choose products quicker.
We also have labels that have modifiable discount values. Here, you can select what percentage offer to show. Currently, it is done manually but we are adding a feature in the upcoming weeks to do it automatically based on the offer values.
Do try it out and share your feedback!
App Link: CLICK HERE TO INSTALL
Cheers, and wish you all the best!