I am a developer, writing apps for iOS, iPadOS and macOS. My current apps are:
Qrafter® is the most comprehensive QR Code and 2D Code scanner and generator for iOS including a customized user interface for iPadOS. It is the only QR Code app that has been constantly updated and maintained since its inception in 2011. Qrafter® can scan and generate QR Codes, Data Matrix, Aztec Codes and PDF417 alongside a multitude of one dimensional barcodes. You can download it from https://qrafter.com/
PSWD is a utility app for iOS and macOS. It can generate strong random and phonetic passwords that can be fully customized to suit your needs. You can find out more about it on https://keremerkan.net/pswd-password-generator/ or download it on the App Store.
SMS Checker is a SMS filtering app for iOS and iPadOS, written using CoreML. I am currently deploying its state-of-the-art machine learning algorithm to a new app with more features, which will be announced in the future.