Primary Contact
Get in Touch
Whether you have a question about the app, your subscription, or anything else, email is the best way to reach us. We read every message and respond personally.
[email protected]We typically respond within 1–2 business days.
Troubleshooting
App Support
Running into something? We want to know. When you write in, it helps to include:
- Your device type and OS version
- A quick description of what's happening
- Screenshots, if you have them
Email: [email protected]
Billing
Subscriptions & Billing
Subscriptions are managed directly by Apple or Google. To cancel or make changes:
- iOS: Settings → Apple ID → Subscriptions
- Android: Google Play → Subscriptions
For anything else, including refund requests, email us at [email protected].
About
About Red Bamboo Chinese
Red Bamboo Chinese (红竹中文) is a Mandarin learning brand built for adult beginners who are ready to take the language seriously. We're based in Raleigh, North Carolina. Our Tone Trainer app uses AI-powered feedback to help you hear and correct your own tones. It's the foundation everything else builds on.