What you present to us are not tools, but services. The tool is something that anyone can pick up and create for their own use without tracking or a subscription relationship. For example, I would generate a QR code to put in a notepad where the website with my username and password is encrypted. If I generate such a code with these programs, a copy of my QR codes is online for everyone! So my use of the tool is not possible.
Can also be done for free on an iPad.
What you present to us are not tools, but services. The tool is something that anyone can pick up and create for their own use without tracking or a subscription relationship. For example, I would generate a QR code to put in a notepad where the website with my username and password is encrypted. If I generate such a code with these programs, a copy of my QR codes is online for everyone! So my use of the tool is not possible.