Nyzo key tool
Paste or type your private key and click the convert button to create private key and public ID image files.
Click the generate button to generate a new private key and public ID.
Then tap or click on the generated images to save them to your device. On iOS devices, you have to do a light long press on the image and choose Save Image in the dialog that appears. If you press too hard on an iOS device with 3D touch capability, the 3D touch feature will activate and you will not be given the option to save the image. When you want to send coins, use your private key. When you only want to check your account information, use your public ID. You also send your public ID file to others so they can send coins to you.
Do not allow anyone else to access your private key. It will give them full control of your wallet. If you lose access to your private key, you will lose access to all of your coins. Take care of it: make sure that you don't lose it, and make sure no one else obtains it.