How to use
1) Search for [reinkstone] in the App Store, and click to download the APP.
2) Install the smartphone case on the mobile phone and open NFC in the settings.
3) Register and log in to the APP to use it.
4) Open the homepage of reinkstone APP and click on the "4-color e-ink screen" to connect the phone case.
5) Click "Start Your Creation" for DIY creation, start to create your own theme, add text and pictures, edit them freely, and create your own theme.
6) After the creation, click the button in the bottom right corner to synchronize and upload to the smartphone case.
