01
Call Assistant
Control how different callers are handled. Saved Contacts and Unknown Numbers can have different default behavior.
KAAL Shield by OpenKAAL
Your Personal Call Firewall
You decide who is allowed to interrupt you,
when, and how.
Built around deliberate call control, local-first decisions where possible, and privacy-aware design.
SHIELD ACTIVE
Control stays with you
Current capabilities
Call control without the noise
KAAL Shield is designed around explicit rules, clear actions, and caller handling that you control.
02
Per-Number Rules
Give individual phone numbers their own rule instead of treating every caller the same.
AllowSilenceRejectSilent Caller Tune
03
Silent Caller Tune
For selected calls, KAAL Shield can use its supported call-control flow so the call is connected without intentional audio being played to the caller. Device and Android behavior can vary.
04
Private Call
Private Call keeps that completed call out of KAAL/local call-history presentation where supported. It does not provide anonymous calling, carrier invisibility, or network anonymity.
05
KAAL Alert
Private lightweight communication between connected KAAL Shield users. Voice-to-text is supported. KAAL Alert network features are under development.
06
Accessibility
Designed with meaningful Android controls, readable states, and TalkBack-friendly interaction in mind.
Privacy principles
A call firewall should not become a surveillance product.
No advertising-based business model currently.KAAL Shield is not currently designed around advertising revenue.
No selling contact books.Your address book is not a commodity.
No unnecessary contact uploads.Call-control decisions are designed to happen locally where possible.
No hidden social graph.Future protection features are intended to use explicit reports and reputation data, not silent contact harvesting.
OpenKAAL Network
A foundation for private alerts and future community protection
KAAL Shield is being designed to support secure device-to-device KAAL Alerts and future community-powered protection against unwanted calls.
The community threat database is not presented as an existing production service. The server foundation is being built so private KAAL Alert communication and future threat intelligence remain separate systems.
Device A
OpenKAAL Network
Device B
Private alerts ≠ threat intelligence
Built for control