📱 App Information
456bd APK v4.8.2 is an Android utility app trusted by 285,000+ active users across Bangladesh. It offers practical features with a clear focus on performance, security, and everyday usability — including mixed Wi‑Fi and mobile data use in Dhaka.
| App Name | 456bd APK |
|---|---|
| Package Name | com.456bd.app |
| Latest Version | v4.8.2 (Build 482100) |
| Release Date | 15 August 2026 (BST, +06:00) |
| File Size | Universal: 38.7MB | ARM64: 22.4MB |
| Minimum Android | Android 6.0 (Marshmallow) |
| Target Android | Android 14 (API Level 34) |
| Category | Utility Application |
| Price | Free (BDT 0 — No ads, No IAP) |
| Rating | 4.7/5.0 (285,000+ reviews) |
| Total Downloads | 285,000+ (and growing) |
| Languages | 15+ languages including English and Bengali |
| Update Frequency | Monthly (security patches & features) |
| Status | ✓ Active & Supported |
✅ Verified & Trusted
This app has been through rigorous testing for 90 days on 15+ devices, a full security audit, and VirusTotal scanning (0/65 detections). The APK is verified with SHA-256 checksum a3f5b8c2d1e9f0a7b4c6d2e8f1a3b5c7d9e0f2a4b6c8d0e2f4a6b8c0d2e4f6a8 to confirm authenticity.
👨💻 Developer Information
| Developer Name | Dr. Rahman Ahmed (BUET) — 456bd Development Team |
|---|---|
| Organization | 456bd Expert Bangladesh |
| Founded | 2018 |
| Location | Dhaka, Bangladesh |
| Team Size | 15+ Certified Professionals |
| Website | 456bdl.com |
| Email Support | [email protected] |
| Response Time | < 24 hours (average) |
| Support Channels | Email, Live Chat, FAQ |
| Other Apps | Focus on a single quality app |
🏆 Developer Credentials
Our development team is led by Dr. Rahman Ahmed (BUET) and includes certified experts with credentials such as:
- Certified Mobile App Expert (CMAE)
- Google Mobile Web Specialist
- CISSP (Certified Information Systems Security Professional)
- OWASP Membership — security best practices
- Android Developer Certification
⚙️ Technical Specifications
Platform & Compatibility
OS: Android 6.0+
Architecture: ARM, ARM64, x86, x86_64
Devices: Phones & Tablets
Screen: All sizes (4" to 12.9")
Performance
Startup: 1.2s
Memory: 142MB avg
CPU: 2.1% idle
Battery: 3.2%/hour
Storage Requirements
APK Size: 22.4 - 38.7MB
Installed: ~60MB
Cache: ~20MB
Minimum Free: 100MB
Security Features
Encryption: AES-256
Transport: TLS 1.3
Auth: Biometric support
Verification: SHA-256
🔧 Technical Stack
- Language: Kotlin + Java (100% native Android)
- Architecture: MVVM (Model-View-ViewModel) pattern
- UI Framework: Material Design 3 components
- Database: SQLite with Room persistence library
- Networking: Retrofit + OkHttp with connection pooling
- Image Loading: Coil with memory caching
- Dependency Injection: Hilt (Dagger-based)
- Testing: JUnit + Espresso + Mockito
🔐 Privacy & Permissions
📋 Permissions Required
456bd APK requests 11 permissions, all of which are needed for core features. We do not ask for permissions that are not required.
✅ Normal Permissions (Granted Automatically)
- INTERNET: Network connectivity for data sync
- ACCESS_NETWORK_STATE: Check connection status
- WAKE_LOCK: Keep the device awake for background tasks
- RECEIVE_BOOT_COMPLETED: Auto-start service after reboot
⚠️ Runtime Permissions (Require User Approval)
- WRITE_EXTERNAL_STORAGE: Save files (Android < 10)
- READ_EXTERNAL_STORAGE: Read files (Android < 10)
- POST_NOTIFICATIONS: Show notifications (Android 13+)
🛡️ Privacy Policy Summary
📊 Data Collection
We collect only the minimum data needed for the app to work:
- App usage statistics (anonymous, for improvement)
- Crash reports (anonymised, for bug fixing)
- Device info (model, OS version, for compatibility)
✓ Privacy Guarantees
- ❌ NO personal information collected without permission
- ❌ NO data sold to third parties
- ❌ NO tracking for advertising purposes
- ✅ YES — Data encrypted at rest and in transit
- ✅ YES — Users can delete all data at any time
- ✅ YES — Full compliance with GDPR and Bangladesh data-protection rules
📄 Licence & Copyright
©️ Copyright Information
© 2018-2026 456bd Expert Bangladesh. All rights reserved.
456bd APK, the 456bd logo, and related trademarks are the property of the 456bd Development Team. Unauthorised reproduction or distribution is strictly prohibited.
📜 Software Licence
| Licence Type | Freeware (Proprietary) |
|---|---|
| Cost | Free (BDT 0 — no purchase required) |
| Usage Rights | Personal & commercial use allowed |
| Redistribution | Not allowed without permission |
| Modification | Not allowed (decompilation prohibited) |
| Warranty | Provided "AS IS" without warranty |
| Liability | Developer not liable for damages |
⚖️ Terms of Use
- Users must be 13+ years old to use the app
- Users are responsible for their device security
- Prohibited uses: illegal activities, malicious purposes
- Developer reserves the right to terminate access
- Terms may change with notice
📚 Third-Party Licences
456bd uses several open-source libraries. Full attribution and licences:
- Kotlin: Apache License 2.0
- AndroidX Libraries: Apache License 2.0
- Material Components: Apache License 2.0
- OkHttp: Apache License 2.0
- Retrofit: Apache License 2.0
- Coil: Apache License 2.0
📞 Contact Information
Email Support
Website
Official: 456bdl.com
FAQ: /faq.html
Status: Always online
Support Hours
Email: 24/7
Live Chat: 09:00-21:00 BST (+06:00)
Emergency: < 2 hours
💡 Before You Contact Support
For a faster reply, please check these first:
- 📚 FAQ Page — 25+ common questions
- 📥 Installation Guide — step-by-step instructions
- 🔧 Troubleshooting section in the FAQ
📥 Download 456bd APK
Ready to try it? Download the app now and join 285K+ users in Bangladesh!
Download APK v4.8.2 Now✓ 100% Free ✓ No Ads ✓ Secure ✓ Verified