Privacy Policy (Walliyo - 4K HD Wallpaper)

Privacy Policy

Walliyo – 4K HD Wallpapers

Effective Date: 14 April 2026 | Last Updated: 14 April 2026

Summary: Walliyo stores user preferences (name, favorites, theme) locally on your device only. We use Firebase for wallpaper delivery, analytics, and notifications. We use Google AdMob for advertising. This policy explains what data is collected and how it is used.

1. Who We Are

Walliyo – 4K HD Wallpapers is developed and published by S.E.R Games (operated by Syed Eahsanur Rahman), based in Dhaka, Bangladesh.

Contact email: contents.sergames@gmail.com

2. What Data We Collect

We classify data into two categories:

2.1 Data You Provide (Stored Locally Only)

Data Type	Purpose	Stored Where	Shared?
Your name (optional)	Personalized greetings	Device only (SharedPreferences)	Never
Favorite wallpapers	Save your liked wallpapers	Device only (SharedPreferences)	Never
Theme preference	Light/dark mode setting	Device only (SharedPreferences)	Never

Important: None of the above data ever leaves your device. We do not operate user-data servers. All data is stored locally using Android SharedPreferences.

2.2 Data Collected Automatically by Third-Party Services

Google Firebase:

Firebase Analytics: Collects anonymized usage data (wallpapers viewed, categories browsed, session duration) and device identifiers to help us understand app usage patterns.
Cloud Firestore & Firebase Storage: Hosts wallpaper metadata and images. No personal user data is stored in Firestore.
Firebase Cloud Messaging (FCM): Sends push notifications about new collections and features. May collect device tokens and instance IDs.
Firebase Crashlytics: Collects crash reports, stack traces, and device state information to improve app stability.