Annotations stay free. Upgrade when AI reading tools become part of your flow.
SparkColors keeps core page annotation free. Translation, AI answers, and page-reading tools use third-party services, so free users get daily per-tool trials while Pro members can use them without limits during the prepaid period.
Payment is easier to reason about
You are buying a fixed membership period, so there is no hidden recurring charge to remember later.
Match the way you read
Different prepaid durations fit focused courses, short research bursts, or long-running reading habits.
Rules are visible upfront
Refunds, stacking, and activation are explained before purchase so the upgrade feels predictable.
Choose a duration
Add stable AI reading capacity to your web workflow
If you only use one or two tools occasionally, the free quotas may already be enough. If translation, AI answers, and page understanding are part of your routine, prepaid Pro becomes the steadier option.
Free
Free User
For everyday annotation, occasional translation, and trying AI reading assistance. Each cost-bearing tool has its own daily free quota.
- Unlimited page annotations
- Limited daily use for translation, AI answers, and reading assistant tools
- Themes, effects, and energy gameplay are not part of paid membership benefits
What changes after upgrade
Included in Pro
Membership does not charge for annotation itself. It upgrades the tools that keep generating third-party AI cost from daily trial quotas to stable availability during the active period.
- Unlimited toolbar translation
- Unlimited toolbar AI answers
- Unlimited key points
- Unlimited understand-this-page
- Unlimited reading path
- Unlimited term explanations
- Unlimited doubt prompts
- Unlimited ask-this-page
Purchase flow
How membership becomes active
The flow is intentionally split into extension authentication, web checkout, and backend confirmation so purchase stays convenient without weakening account binding or activation trust.
Open the website from the extension
The extension attaches a temporary credential so the website knows which account the order should belong to.
Create a secure checkout order
After choosing a duration, you move to the payment page. SparkColors creates the order but does not store payment-sensitive details in the client.
Wait for webhook confirmation
After payment, membership is granted from the Creem webhook and backend order state so redirect parameters alone cannot fake activation.
Common questions
You might be wondering...
If your biggest concerns are renewal, refunds, stacking, or redeem codes, this section lays out the important rules before you buy.
No. The first version uses prepaid membership: buy 30 or 365 days, then it naturally expires. There is no automatic charge.