Privacy Policy – Ketlin
Last updated: July 2026
Welcome to Ketlin AI. We value your privacy and are committed to protecting your personal information. This Privacy Policy explains how we collect, use, store, and protect your information when you use our Ketlin – English Learning App.
1. Information We Collect
We may collect the following types of information:
Personal Information
Email address
User account information
Subscription information
Voice and Text Data
Voice recordings used for speaking practice
Text messages entered during conversations
Grammar correction requests
Role-play conversation inputs
Device Information
Device model
Operating system version
App version
Device identifiers
Advertising identifiers
IP address
Usage Information
Features used
Session duration
App interaction information
Performance and crash reports
2. How We Use Your Information
We use your information to:
Provide AI-powered English learning services
Deliver speaking practice and conversation features
Provide grammar correction
Improve app performance
Personalize learning experiences
Process subscriptions
Display advertisements
Detect and fix technical problems
Improve user experience
3. Microphone Permission
Ketlin requires microphone access to provide:
Voice conversations
Speaking practice
Pronunciation assessment
AI conversation features
The microphone is only used when required for these features.
4. AI Services and Data Processing
Ketlin uses Artificial Intelligence (AI) services to provide:
Speaking practice
Grammar correction
Conversation practice
Role-play scenarios
English learning assistance
User text inputs and voice inputs may be processed by third-party AI services to generate responses and improve the learning experience.
We do not sell your personal information. AI processing is performed solely to provide requested services.
5. Third-Party Services
Ketlin uses the following third-party services:
Firebase Authentication
Used for:
User authentication
Account management
Firebase Analytics
Used for:
Understanding app usage
Improving user experience
Firebase Crashlytics
Used for:
Detecting application crashes
Improving app stability
Google AdMob
Used for:
Displaying advertisements
Supporting the free version of the app
These services may collect:
Device identifiers
Advertising identifiers
IP addresses
Crash reports
Usage information
Please refer to their respective privacy policies for more information.
6. Advertising
Ketlin uses Google AdMob to display advertisements.
AdMob may collect:
Device identifiers
Advertising IDs
IP addresses
Device information
App interaction information
This information helps provide and improve advertising services.
7. Subscriptions and Payments
Ketlin may offer premium subscriptions through Google Play Billing.
All payments are processed securely by Google Play.
Ketlin does not collect or store payment card information.
Subscription pricing, free trials, renewal terms, and cancellation options are managed by Google Play.
8. Data Retention
We retain user information only for as long as necessary to:
Provide our services
Comply with legal obligations
Resolve disputes
Enforce our policies
9. User Rights
Users may:
Request access to their data
Request correction of inaccurate information
Request deletion of their account and associated data
For any requests, contact:
Email: ask.ketlin@gmail.com
10. Account Deletion
Users may request permanent deletion of their account and associated data by contacting:
ask.ketlin@gmail.com
We will process deletion requests within a reasonable period, subject to applicable legal requirements.
11. Children's Privacy
Ketlin is intended primarily for users aged 13 years and above.
We do not knowingly collect personal information from children under the age of 13. If we become aware that personal information from a child under 13 has been collected, we will take appropriate steps to delete such information.
12. International Data Transfers
Some of our service providers may process data on servers located outside your country of residence.
By using Ketlin, you acknowledge that your information may be transferred and processed internationally.
13. Data Security
We implement reasonable security measures to protect user information, including:
Secure network communication (HTTPS)
Access controls
Industry-standard security practices
However, no method of transmission over the internet is completely secure.
14. Changes to This Privacy Policy
We may update this Privacy Policy from time to time.
Any changes will be posted on this page with an updated revision date.
15. Contact Us
If you have questions regarding this Privacy Policy, please contact:
Ketlin AI Support
📧 ask.ketlin@gmail.com