Defndr: SMS Spam Blocker

Defndr is an SMS firewall that stops spam before it reaches you.

On-device machine learning checks every message from unknown senders, blocks phishing and scams, and quietly sorts the rest into the right folder — without sending anything anywhere. Your messages never leave your iPhone.

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ZERO-TRUST PRIVACY
- 100% on-device processing
- No cloud servers
- Nothing to sign up for
- Your data stays on your device

FREE
- On-device spam and scam detection
- Custom keyword blocking
- Protection against shortened and disguised phishing links
- Automatic sorting into Transactions, Promotions and Junk
- No ads, no data collection

DEFNDR PRO
- Advanced machine-learning detection for sophisticated scams
- Adjustable sensitivity, from lenient to strict
- Allow and block lists for senders you choose
- Unlimited custom keywords
- Detection for suspicious formatting, links and patterns
- Custom theme studio with a gradient editor

HOW IT WORKS
Defndr plugs into iOS Message Filtering and runs silently in the background. Messages from people in your contacts are never touched — only texts from unknown senders are checked, and the verdict is decided entirely on your device.

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Web: https://dro1d.org
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Privacy: https://dro1d.org/defndr-privacy.html