No sign up. No log in. We don't want your email address. Just launch the app and do the job.
For copying, a 4-character, easy-to-memorize code will be generated. You can then use this code to retrieve your copied text from anywhere: other Android devices with this app, or anything with a browser that can visit directpaste.com.
Your copied text will self-destruct in 15 minutes. No extra action is required to protect your privacy, so you can just copy-and-paste and forget about it. Alternatively, you can use the erase link to erase it explicitly at any time.
There is an app available too if you also own an iOS device.