How many free conversions do I start with?

Each account receives 3 complimentary conversions. Every annotated EPUB consumes one credit until you replenish or subscribe.

What happens when the free credits run out?

The annotator stops processing new uploads until you purchase a single-use credit or activate an unlimited plan.

Can I stack credits and subscriptions?

Yes. Extra credits stay on your account and are only consumed when you are not on an active unlimited plan.

Guides · AI EPUB Vocabulary Assistant

How Free Credits, Top-Ups, and Subscriptions Work

This guide explains the credit system behind the AI EPUB Vocabulary Assistant so you always know how many annotations remain before you need to recharge or subscribe.

Step 1 — Start with 3 free conversions

Every verified account receives 3 complimentary conversions. The counter lives in your dashboard and in the upload form. Each time you click “Annotate my book,” one credit disappears. Once the counter reaches zero, the annotator pauses until you top up.

Tip: spread those free conversions across different CEFR levels to learn which configuration generates the most helpful glosses for your reading style.

Step 2 — Add single-use credits when you need them

After the free tier, you can purchase one-off credits for $4.90. Credits never expire and are deducted only when you are not on an active subscription. They are ideal for occasional readers and classrooms that annotate a few titles per month.

Credits stack; if you buy five, you can run five additional conversions.
You always see the remaining total before hitting “Annotate.”
Credits apply to any CEFR level or translation backend configuration.

Step 3 — Switch to unlimited plans for heavy usage

$9.90 / month

Unlimited conversions for a month, perfect for intensive study sprints or editorial projects.

$49.90 / year

Continuous access for year-round readers. Annual plans cost less than five single credits per quarter.

When an unlimited plan is active, your credit counter shows “Unlimited.” Credits you previously purchased remain untouched until the subscription lapses.

Frequently Asked Questions

Can I annotate without signing in?+

No. You need an account to track credit balances reliably and to keep your Stripe purchases synced across devices.

Do unused credits roll over?+

Absolutely. Credits never expire and they wait in your account until you need them, even if you cancel subscriptions.

How fast does the counter update?+

Instantly. The upload form polls your balance when it mounts and after each conversion, so you always know how many free or paid credits remain.