ChatKu Privacy Policy
Last updated: October 14, 2026
This policy explains what information the ChatKu app (published by Amer InfoTech) collects, how it is used, and your choices.
How ChatKu works
ChatKu has no accounts, phone numbers or email sign-up. When you first open the app, it creates an encryption key pair on your phone. Your ChatKu ID is derived from your public key. You add contacts by scanning their QR code or entering a short invite code.
Your messages
- Messages, contacts, your name and your profile photo are stored only on your phone. Your name and profile photo are shared only with contacts you add.
- Messages and profile photos are end-to-end encrypted on your phone before they are sent. Only the person you are chatting with can read them. We cannot.
- Where possible, phones connect directly to each other. When a direct connection is not possible, encrypted data passes through our relay server, which forwards it immediately and keeps no copy.
What our relay server handles
To connect you with your contacts, the relay server temporarily handles:
- Your ChatKu ID and public key, and whether you are online. This is kept in memory only while you are connected.
- Invite codes you create. These are kept in memory for up to 24 hours, or until you create a new one.
- Your IP address, which any internet connection reveals. It is used only to deliver data and is not logged or stored.
The relay keeps no message history, contact lists or message content, and it cannot decrypt anything passing through it.
Camera and notifications
- Camera - used only to scan a contact's QR code. Camera images are not saved or sent.
- Notifications - used to tell you about new messages. ChatKu runs a background service so it can receive messages while the app is closed.
Advertising
ChatKu shows banner ads through Google AdMob to keep the app free. AdMob may use your device's advertising ID and collect information such as your IP address and device details to show ads, which may be personalised. Ads never have access to your messages. Learn more at policies.google.com/technologies/partner-sites.
Services we use
- Google AdMob - advertising.
- Railway - hosts the relay server.
Children
ChatKu is not directed at children under 13.
Deleting your data
Everything you create in ChatKu lives on your phone. Clearing the app's data or uninstalling it deletes your messages, contacts and keys. There is nothing stored on our servers to delete.
Changes to this policy
If the app changes how it handles information, we will update this page and the date at the top.
Contact us
This app is published by Amer InfoTech Solution, Reg. No. 202603275213 (PG0594872-T), Sarawak, Malaysia. Questions about this policy or your data: amertech0001@gmail.com.