Last updated October 31, 2026

Privacy Policy

CantoGo is an app for learning to speak Hong Kong Cantonese, made by Bitwise LLC (“we”, “us”). This policy explains what we collect when you use CantoGo on iPhone or Android, why, who helps us run the app, and the choices you have.

The short version

What we collect

Your account

When you start CantoGo we create an account for you, so your progress can be saved. You can then sign in with Apple (iPhone), Google, or an email and password. We store:

What you tell us during setup

Your first name, why you’re learning (for example family, travel or work), your Cantonese level, how many minutes a day you want to practise, and whether and when you’d like a daily reminder. We save these as you go through setup, so they may be stored even if you don’t finish it.

Your learning progress

Your lessons, words, flashcard reviews, saved and starred phrases, XP, streak and app preferences. We keep daily snapshots of your progress for 30 days, so we can restore it if something goes wrong.

Your voice

CantoGo uses the microphone only for speaking practice. In lessons it opens by itself when it’s your turn to speak, and closes when you stop.

We ask first. Before your first recording, your phone asks whether CantoGo may use the microphone, and says that your recording is sent to a third-party speech service to score it. Nothing is recorded or sent unless you allow it. If you don’t, you can keep practising by listening, without scores, and you can turn the microphone on or off at any time in your phone’s settings.

Once you’ve allowed it, here’s what happens to a recording:

  1. The app records the line, checks it on your phone, and trims the silence at each end.
  2. It sends the recording, with the line you were practising, to our server. Our server passes the audio to ElevenLabs, an AI speech-to-text service, to find out what was said.
  3. Our own scoring compares what was heard with the line and marks each character.
  4. The recording is deleted from your phone after use. Anything left behind, for example if the app was closed mid-recording, is cleared once it’s an hour old, the next time you practise. We don’t store the audio on our servers.

We do keep a record of each attempt with your account: the line, the text the speech recognition heard, the score and technical details such as timings and recording quality. We use it to fix scoring problems and improve scoring. It’s deleted when you delete your account.

The demo on our website works the same way, without an account: your recording is sent to our server, transcribed by ElevenLabs and scored, and the result is shown to you. Neither the recording nor the result is stored.

The voice you hear in the app is an AI voice from ElevenLabs. Those clips are made ahead of time and built into the app, so nothing you do is sent anywhere to play them.

Subscriptions

If you subscribe to CantoGo Pro, Apple or Google handles the payment. We never see your card details. We receive your subscription status (for example trial, active or expired) and purchase records through RevenueCat. On iPhone, RevenueCat also receives Apple’s Search Ads attribution token, which says whether an Apple Search Ads ad led to the install.

Notifications and email

If you allow notifications, we store a push token for your device so we can send your daily reminder. Tips, new lessons and offers are sent only if you said yes to them, by notification and, if your account has an email address, by email. You can turn them off at any time in the app’s Settings (“Tips & offers”) or in your phone’s settings, and every email has an unsubscribe link.

These emails come from contact@cantogoapp.com and include a welcome and first-week check-ins, a reminder before a free trial ends, a note if you haven’t practised for a while, an invitation to our learner community, and occasional offers. We use whether you’ve finished a lesson, when you last opened the app, your trial’s end date and whether you’ve joined the community to decide which ones to send.

Usage, diagnostics and device information

How you use the app (screens viewed, lessons started and finished, setup and paywall steps), crash and error reports, and device information such as the model, operating system, language and IP address. Usage reports can include a recording of your screens in the app, and error reports a short one of the moments before the error. In these recordings all text, everything you type (including passwords) and images are masked.

Rammy on iMessage

Rammy is our Cantonese tutor that you text in iMessage, separate from the app. When you sign up on cantogoapp.com/rammy, we register your phone number, and your first name if you give it, with Photon, the service that runs Rammy’s iMessage line, so Rammy can text you.

When you text Rammy, your messages are handled by these services so Rammy can reply:

We keep your recent chat with Rammy (up to the last 80 messages) and short notes Rammy makes about you, such as why you’re learning and the words you’ve practised, so it remembers you. Photos and voice recordings aren’t stored: we keep only the text of what you said. Text “/reset” to Rammy at any time to delete your chat history and notes. To remove your number from Rammy completely, email us.

Who helps us run CantoGo

We share data with these providers only so they can do their job for us:

Each provider handles data under its own privacy policy. Our account ID is a random identifier. We don’t send your name or email to analytics, crash reporting or Meta, and your email goes to OneSignal only to send the emails you agreed to.

We may also share information if the law requires it, or to protect CantoGo, our users or others. If CantoGo is ever sold or merged, your information may move with it under this policy.

How long we keep it

Your choices and rights

We use your information to provide the app and keep it working, to save and sync your progress, to score your speaking, to send the reminders and messages you agreed to, to improve CantoGo and to measure our ads.

Where your data is processed

We and our providers process data in the United States and other countries, which may have different data protection laws from where you live.

Security

Data is sent over encrypted connections, and each account can only read its own data. No system is perfectly secure, but we work to protect your information.

Children

CantoGo is not directed at children under 13, and we don’t knowingly collect their personal information. If you think a child has given us personal information, email us and we’ll delete it.

Changes to this policy

If we change this policy, we’ll update the date at the top of this page. If the changes are significant, we’ll also let you know in the app.

Contact

Questions or requests: contact@cantogoapp.com.