Such a newbie and looking for an app that will create a staggered sale. Example: spend at least $100 get 20% off, spend $175 or more and get 25% off, spend $250 or more and get 30% off. We would need to be able to exclude some items (gift cards, sale items, etc.). Are there any recommendations for good apps for this?
Karlie here from the Shopify Support Team! I've taken a look at your inquiry, it looks like there are quite a few apps available that offer the functionality you want. It sounds like you're looking for a way to offer tiered pricing or tiered discounts. I've found three apps in particular that look like they would fit your needs best. I would recommend checking out the apps;
If you find that these apps don't work for you, then you can always look into another option or even look into hiring a developer to create the functionality you're looking for. Shopify Experts are developers, designers, marketers and photographers who you can hire to help you with different aspects of your online store. You can check out our Shopify Experts, here.
If you have any questions about those apps, then you can always reach out to the app developer for assistance. Each app has a 'Support' section listed on the app page in the Shopify App Store that you can use to contact the app developer with any questions you have.
I hope this has answered your question. If not, or if you have any further questions please let me know. I will be happy to help!