Caller Guard by Lyric Labs is a communication app built to block spam calls and id unknown numbers. It focuses on doing one thing well, with a clean interface and a light footprint at 42 MB.
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8.4.2Stability fixes and minor UI tweaks.May 2026 · 42 MBGet
8.4.2New settings and faster startup.April 2026 · 42 MBGet
What's New (v8.4.2)
Performance improvements and faster startup
Bug fixes and stability tweaks
Refreshed interface and new settings
How to install Caller Guard
Allow installs from your browser or Files app
Open Settings → Apps → Special access → Install unknown apps, then allow the app you will download with (usually Chrome or Files). On older phones use Settings → Security → Unknown sources.
Download the APK from an official source
Use the official download button on the app page. Only download from the developer or an official store — never from random pop-ups or shortened links.
Open the downloaded file
Tap the APK from your notification shade or Files app. Android will show what the app can access before you continue.
Install and open
Tap Install, wait a few seconds, then Open. That is it — the app is ready to use.
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