Block Unknown & Spam Callers
Block or silence spam and unknown callers — automatically reject or mute any phone number that isn't saved in your contacts. No sign-up, no contacts access, and 100% on-device. A free, privacy-first Android call blocker by Life Software Lab.
Why people use it to block spam and unknown numbers
- Privacy-first by design — no account, no contact upload. The app never reads or uploads your contacts; all data stays on your device.
- Block in one tap — flip one switch and choose to block or silence unknown numbers. No complex setup.
- Never miss what matters — an allow list and repeat-call bypass let the calls you need (family, clinics, delivery, work) still get through.
Features
- Auto block — automatically rejects spam and unknown calls from numbers not in your contacts, and logs them.
- Silence — keeps the call but mutes the ringer, so you're never interrupted yet never miss something important.
- Allow list — always-allow numbers by exact match or by prefix.
- Repeat-call bypass — if the same number calls back within a set time, it's allowed automatically.
- Blocked & silenced log — review every handled call so nothing slips by.
- Stats & insights — see how many spam interruptions you cut over the last 7 and 30 days.
How to block unknown callers in 4 steps
- Install from Google Play and allow the call-screening permission.
- Choose Block or Silence for unknown numbers.
- Set exceptions with the allow list and repeat-call bypass (optional).
- Check the log and stats to see blocked and silenced calls.
Frequently asked questions
Does the app read or upload my contacts?
No. The app has no contacts permission at all and never requests READ_CONTACTS. Android's call-screening system only hands the app calls from numbers that are not already in your contacts, so the app never even sees your contact list.
Do I need to sign up, log in, or pay?
No to all three. There's no account, no email, and no subscription. Install it, set it as your call-screening app, flip one switch, and you're protected. The app is free, supported by ads.
Which calls get blocked?
Only calls from numbers that are not saved in your contacts — typically spam and unknown callers. Anyone in your contacts always rings through normally.
What's the difference between Block and Silence?
Block rejects the unknown call outright and logs it. Silence lets the call through to your normal call log but mutes the ringer so you aren't interrupted. You can switch anytime.
Which Android versions are supported?
Android phones running Android 10 or newer, where Android added the call-screening role the app relies on. It's an Android-only app.