Class-Navi+Contact & customer service
Business name: Class-Navi+
We provide customer support for billing, access, and product questions related to the Class-Navi+ Chrome extension subscription.
Primary support channel. Include your account email and a short description of the issue.
Response time
We aim to reply within 2 business days (Monday–Friday, excluding U.S. federal holidays). Urgent billing issues are prioritized.
Billing & subscriptions
For invoices, payment methods, or cancellation, use Manage billing in the extension (Stripe Customer Portal) after signing in.
What to include
Your sign-in email, browser version, install source (Chrome Web Store or developer mode), and screenshots if something fails in Class-Navi.
Business information
- Product: Class-Navi+, subscription Chrome extension for Kumon Class-Navi instructors
- Type of sale: Digital software / SaaS (no physical goods shipped)
- Website: https://api.centerflowapp.com
Class-Navi+ is not affiliated with Kumon Institute of Education or Kumon North America.