Block private and hidden callers
Calls that arrive without caller ID — often shown as "Private," "Restricted," or "Unknown" — can be filtered automatically according to the rule you set.
Features
Precise, transparent call control.
LineLayer is built around explicit rules rather than guesswork. Here's what it actually does.
Block numbers that are not in your contacts
Filter calls from numbers you haven't saved. This is a broad rule, so LineLayer also gives you ways to make room for legitimate callers who fall outside your contact list — like allow lists and Expected Call Mode.
Allow and block lists
Keep an explicit list of numbers you always want to let through, and a separate list of numbers you never want to hear from. Rules you set take priority over broader filters.
Country-based call rules
Set rules to block calls originating from specific countries, based on the criteria you configure — useful if you don't expect calls from certain regions.
Urgent retry handling
Legitimate callers with something urgent often call back quickly. LineLayer accounts for repeat calls in a short window so genuinely urgent contact attempts aren't treated the same as a single blocked call.
Expected Call Mode
Waiting on a callback from a clinic, technician, or delivery driver? Temporarily relax your relevant filtering rules so an unrecognized number can get through — then let your normal rules take back over.
Call history with clear reasons
Every filtered call is logged with the reason it was allowed or blocked, so your rules stay transparent instead of feeling like a black box.
Local-first processing
Call filtering is designed around local processing on your device rather than depending on a massive shared caller-ID database.