Hey @Bernice1
Square can be downloaded from the Apple App Store free of charge here: https://apps.apple.com/us/app/square-point-of-sale-pos/id335393788
Alternatively if you mean you have lost the Square hardware that you connect to your iPhone 7 you can shop replacements here: https://squareup.com/us/en/hardware
If this has helped please mark it as best answer to help others in the future!
