We're comparing what you get for the money. A $100 developer account from Apple allows you to sign software so that there will be no scary dialog boxes when a

We're comparing what you get for the money. A $100 developer account from Apple allows you to sign software so that there will be no scary dialog boxes when a user downloads your software off the internet and opens it. An ~$100 code signing certificate for use on Windows will allow you to digitally sign your Windows application, but users will still see a scary dialog box from Windows SmartScreen when they download your software unless you spend a good bit more to step up to an Extended Validation certificate. If you don't want to pay, you'll just have to accept that users are going to see a scary dialog box, and take care to warn them that it will happen on your website.