Chăm Luyện

Last updated 10 October 2026.

The short version

Chăm Luyện collects nothing about you or your child and sends nothing about you. There are no ads, no accounts, no analytics, no tracking and no in-app purchases. The app uses the internet only to download extra voices.

What goes over the internet

Voice files, and nothing else. One voice comes with the app. The others are downloaded from the app's public page on GitHub (github.com/azun-k2/chamluyen), when your child picks one, a couple of minutes after the app opens, when Settings is opened, and when the app goes to the background. Each download asks for a sound file by its name; it carries no information about your child, their progress or their name.

What GitHub sees. Like any website, GitHub receives your device's IP address and the usual details of a web request when a file is downloaded. GitHub handles that under its own privacy statement. We receive nothing from these downloads.

Checked before use. Every downloaded voice is checked against a fingerprint built into the app, and is discarded if it does not match.

What is stored, and where

Your child's profile, on the device only: the name typed in, the buddy, stars, progress and settings, kept in the app's own storage. If your device backs itself up, for example to iCloud, the backup can include it, as it does other apps' data.

Downloaded voices are kept in a separate folder that is left out of backups, since they can be downloaded again.

Deleting the app removes both.

Feedback email

If a grown-up taps Góp ý cho người làm ứng dụng in Settings, the app opens a new email in your mail app with a short template: the app version, the device model and iOS version, the chosen accent, whether the voice is on, and the number of stars. Nothing is sent until you press Send, and you can change or delete any of it first.

Children

Chăm Luyện is made for children. It asks only for a first name, so the buddy can greet the child, and that name never leaves the device. There is no account to create and nothing to buy. Everything the child hears was written and recorded in advance; no AI talks to your child.

Contact

Questions about this policy, or anything else: khangazun@gmail.com.