Frequently asked questions about LineLayer

LineLayer is an Android call-filtering app. You set explicit rules — like blocking numbers outside your contacts — and LineLayer applies them locally on your device, with a clear history of why each call was allowed or blocked.

No. LineLayer doesn't identify who a caller is, and it isn't a caller-ID service. Its core filtering runs on rules you set — like blocking numbers outside your contacts. Separately, LineLayer can check whether a number has public reported activity, and Smart Protection (LineLayer Pro) can automatically handle calls with strong reported-activity matches — that's a report of public complaints, not proof of spam or fraud.

A LineLayer Pro feature that can automatically handle incoming calls with strong public reported-activity matches, in addition to your own rules. It's based on public consumer-report data, not caller-ID identification — a report isn't proof that a number's owner made an unwanted call, caller ID can be spoofed, and reported-activity coverage varies by country.

LineLayer's in-app reported-activity checks use a bundled FTC Do Not Call snapshot and run on-device. LineLayer Learn's reported numbers lookup uses a broader public dataset that currently includes both FTC reports and FCC complaints. Neither source is caller identity verification, and public reports are not proof of spam or fraud.

LineLayer is free to install. LineLayer Pro is an optional paid upgrade that adds Smart Protection, which can automatically handle calls with strong reported-activity matches. See the current price on Google Play .

That depends on the rules you configure. You can choose to block non-contact numbers, allow them, or make exceptions using allow lists and Expected Call Mode for a call you're waiting on. See how non-contact call blocking works on Android for the full breakdown.

A way to temporarily relax your relevant filtering rules while you're waiting for a legitimate call from a number you don't recognize, such as a callback from a clinic or delivery driver. Your normal rules apply again once it's off.

Not universally. Android's call-screening role — the mechanism LineLayer uses to apply rules before a call rings — doesn't receive calls whose presentation is restricted, unknown, unavailable, or payphone, so LineLayer can't guarantee blocking every private or hidden call. LineLayer's rules reliably apply to calls Android makes eligible for screening — most usefully, visible numbers that aren't in your contacts. See private, hidden, and unknown calls explained for the full terminology breakdown.

Yes. Numbers on your allow list are let through regardless of your other filtering rules.

Yes. LineLayer's call history shows the reason a call was allowed or blocked, based on the rule that applied.

No. LineLayer's core call filtering runs locally on your device, evaluated against the rules you set. Smart Protection (LineLayer Pro) additionally checks public reported-activity data to automatically handle strong matches — that check doesn't involve uploading your contacts either. See LineLayer's privacy details for the full picture.

LineLayer is available for Android on Google Play .