# Docs

- [Introduction](/introduction): What Ordera is, and where to start.
- Installation
  - [Ordera Admin](/installation/admin): Install the Ordera Admin app on iPhone, iPad or Android.
  - [Ordera POS](/installation/pos): Install the Ordera POS app on iPad or Android.
  - [Ordera Kiosk](/installation/kiosk): Install the Ordera Kiosk app on an Android tablet or floorstand.
- Guidelines
  - [Image size](/guidelines/images): The exact size, shape and file type for every image you upload to Ordera.