QKSMS

The Android messaging app QKSMS is open-source and completely free of advertisements. Users can schedule messages, backup and restore their messages, create custom themes, easily search messages, send quick replies to save time, and schedule messages. You can enable automatic night mode to safeguard your vision in low light conditions and set up per-contact notifications to further personalize your experience.

Due to its support for both dual-SIM and multi-SIM phones, QKSMS stands out among other messaging apps. With the integration of Should I Answer?, QKSMS also makes it simple to block contacts and detect spam automatically.

Notable features:

• Free version available
• In-app purchases: $0.99 – $9.99 per item
• Support available: Email

Pros

• Automatic spam filtering
• Ad-free and open-source
• Multi-SIM support

Cons

• Can’t pin important messages

Download: https://play.google.com/store/apps/details?id=com.moez.QKSMS&hl=en&gl=US

Website: NA