Qstomizer is compatible wit any other app available in the Shopify App Store.
It you plan to use an options app like 'Bold Options', 'Infinite Options' or a tiered prices app like 'Bold Quanity Break' or any other like these ones, it is necessary to do a little change in Qstomizer to make these other apps compatible with Qstomizer.
Qstomizer by default, creates a new product in the store each time a customer personalises a product. These other apps does not work fine with products created on the fly.
But, this behavior can me changed with ease to avoid the creation of a product each time a customer personalises a product.
If this is your case, feel free to contact us. We will do the necessary changes in the theme of your store to make those other apps compatible with Qstomizer.