4Messages

4Messages is completely ad-free and open source so you don't have to worry about your privacy.

Minimalistic interface, yet intuitive and customizable. You can paint it in any colors. Has four themes: White, Gray, Dark and Black.

Features:

- Dual-SIM and Multi-SIM phones are fully supported

- Backup and Restore your messages

- Support for group chats

- You can block conversations and manage your blacklist, or automatically filter spam using the "Should I reply?"

- Supports Wear OS (Android Wear), TalkBack and Samsung Voice Assistant.

Based on QKSMS.