AnkiApp Basic (free) only provides sync access for one device.
With AnkiApp Unlimited, you get all these features:
- Unlimited sync with AnkiApp on all devices
- Unlimited reviews
- Automatic cloud backup
- Access to AnkiApp Web
- Unlimited data storage and retention
Supporting AnkiApp by purchasing AnkiApp Unlimited allows us to continuously develop and improve the experience for all of our users.