9bests Android Tester Guide
Help us test and validate 9bests for Android before public launch. Experience offline AI stack curation, live sync, and privacy-first local storage.
🚀 1. How to Join the Closed Beta (3 Steps)
Please complete the following 3 steps in order with your Android Google account to gain access:
Join Google Group
Join our official tester group with your Google account to authorize Play Store closed beta access.
Accept Testing Invite
Open the Google Play test opt-in page and click "Become a Tester" to activate your account.
Download on Google Play
Install 9bests directly from Google Play Store on your Android device and begin testing.
🧪 2. 6 Core Test Missions for Testers
1. Offline First Launch
Turn on Airplane Mode. Open the app. Confirm that all 206 tools, categories, and reviews load instantly with zero delay.
2. Live Catalog Sync
Connect to Wi-Fi. Check if fresh catalog updates and new tool additions sync smoothly without blocking UI interaction.
3. Custom Stack Management
Add 3–5 tools to your personalized "My AI Stack". Restart the app to verify persistent local storage.
4. Tool Comparison
Navigate to the Compare tab. Select two AI tools and check table rendering, pros/cons alignment, and pricing notes.
5. Data Backup & Restore
Export your local AI stack to a JSON file in your Downloads folder, then restore it using the file picker.
6. Outbound Browser Intent
Tap "Visit Official Website" on any tool card. Confirm that your system browser launches cleanly without breaking app state.
🔒 3. Privacy & Safety Guarantee
The 9bests Android app requires zero dangerous permissions (no camera, microphone, contacts, location, or phone storage access). Your curated AI stacks remain stored 100% locally on your device.
For full details, review our Privacy Policy.
Have Feedback or Found a Bug?
Your feedback is directly shaping the production release of 9bests. If you experience crashes, layout issues, or have feature ideas, please email our engineering team at: