Complete security
for your iPhone,
in one app.
Onyx layers six security defenses — Ad Block, WebShield DNS, SMS scam filter, identity monitoring, device checks and battery guides — into a single calm interface.
Six defenses, stacked.
Each layer is independent and toggleable. Together they form a complete shield around your phone, your browsing and your identity.
Ad Block
Blocks ads and trackers in Safari using a curated JSON list of advertising and tracking domains.
WebShield
Stops malicious and suspicious sites at the DNS level. Every domain is checked against a security API before loading.
SMS Scam Filter
Scans messages from unknown senders for scam phrases generated via GPT and moves suspicious ones to Junk. Works with regular SMS (not iMessage).
Identity Monitoring
Checks whether your email appears in known data breaches and alerts you the moment new leaks are found.
Device Security Check
Verifies that a passcode is enabled and the latest iOS is installed — the basics that prevent the worst.
Battery Health Guides
Personalized recommendations to extend battery life — Location Services, brightness, background activity and more.
Built to feel calm.
Onyx makes security legible — clear scores, plain language, and one button to fix it all.
Lock down your iPhone in a minute.
Install Onyx, enable each layer with a tap, and let it run quietly in the background.
Download on App Store