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Plans and limits in EON

Updated on August 5, 2026

NoxDragon Academic offers a free plan and paid plans. A single subscription covers all apps on the platform: EON, Theca, Imagine, and SimuLab.

What changes by plan

There are two types of limits in EON:

  • Cards — the total number of text cards and diagram or image cards you can have.
  • AI usage — the tokens available for artificial intelligence features, such as automatically generating the back of a card or extracting diagram boxes.

Exact limits depend on the plan and you can check them on the Academic plans and limits page.

Warning before you exceed a limit

EON checks whether you are about to exceed your limit before creating content. If the number of cards you are about to add or import goes over your quota, the app tells you and gives you the option to upgrade your plan. Nothing is created until you confirm.

What happens if you downgrade your plan

If you switch to a plan with lower limits, the content you already have is not deleted. You simply cannot add more cards or use more AI features until you are back within the limit or upgrade your plan.

Your review history and existing Deck Packs are always preserved, regardless of your plan.

Frequently asked questions

Do I need to pay separately for each app? No. NoxDragon Academic plans cover all apps on the platform with a single subscription.

Where can I see how many cards I have used? When you reach the limit, the app tells you directly. To see the details of your current usage, visit the Academic plans and limits page.

Can I regain access to AI features once I run out of tokens? AI tokens renew according to your plan's period. The app tells you when you can try again.

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