1. App can work standalone if you don't have infrastructure.
2. Integration is also possible If you have infrastructure.

Mobile-server communication is encrypted under SSL. Sensitive data are encrypted in DB (card ID, current state, last used time). Periodical DB backup (every day). GDPR - only optionally email to register. We don’t sell any data for marketing or other purposes to third parties.

Image dimensions: 450 x 225 (weight x height).
The image should not contain transparent parts or be rounded at the ends.
1 - upper text
2 - large middle text
3 - lower text
4* - this text we generate and it represents the number of used terms and the total number of terms (2/12)
All texts are optional which means that if you don't want you can omit them. As you can see the Warrior Factory card has no texts 1 and 2. For each text it is possible to define the text color as well as the background color of the text. All texts can be changed / added / deleted later and the changes will be immediately visible to end users.

As we have a grid view in the application for easier navigation when user have a lot of card, text is needed for that as well. Marked in red 1. This text should not be too long. Limit is 20 characters. This text is always white with a transparent dark background (as in the picture). Color can't be defined here.

When the card is clicked and user enters the next screen where the QR code is displayed, you define the black text (marked in red 1). The color of the text is always black and cannot be changed.