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Screenshots

  • PaSS: Prefix, Spam Block & SIM screenshot 1
  • PaSS: Prefix, Spam Block & SIM screenshot 2
  • PaSS: Prefix, Spam Block & SIM screenshot 3
  • PaSS: Prefix, Spam Block & SIM screenshot 4
  • PaSS: Prefix, Spam Block & SIM screenshot 5
  • PaSS: Prefix, Spam Block & SIM screenshot 6
  • PaSS: Prefix, Spam Block & SIM screenshot 7
  • PaSS: Prefix, Spam Block & SIM screenshot 8

About PaSS: Prefix, Spam Block & SIM

You decide who sees your number, which SIM you use, and who can call you.

PaSS patiently waits in the background until you make or receive a call. It then instantly and invisibly executes the exact rules you’ve set up. Fully automatic, but you keep 100% of the control. Everything is processed securely and locally on your own phone.

WHAT CAN YOU CONFIGURE WITH PASS?

📞 Smart Calling (Outgoing)
• Hide Caller ID & Anonymous Calls: Create a rule that automatically adds the #31# prefix for specific contacts. Call clients or patients anonymously, but show your number to friends.
• Dual SIM Manager: Link contacts or groups to a specific SIM card. Prevent yourself from ever accidentally calling your boss with your private number again.
• Auto-Format Numbers: Let PaSS automatically add country codes to copied phone numbers.

🛡️ Spam Blocker & Unwanted Callers (Incoming)
Build your own local firewall against robocalls and telemarketers.
• Local Spam Lists: Add numbers or entire ranges (using wildcards like +1800*) to your local spam list yourself. Make a rule to block these calls instantly.
• Block Anonymous Calls: Set up a rule to automatically reject anonymous or hidden callers.
• Call History: Easily see in the app who called and which of your rules was applied.

⚡ Smart Environment Triggers
Make your rules adapt to your surroundings:
• Calendar: Automatically mute work calls when you have an appointment in your calendar.
• Bluetooth: Instantly reject unknown numbers as soon as you connect to your car kit.
• Wi-Fi: Set your work SIM as the default when connected to your office Wi-Fi network.

⚙️ HOW DOES THE LOGIC WORK?
You build actions using a simple 'If-Then' system:
🔹 IF [Caller is in Spam List] THEN [Block Call]
🔹 IF [Contact = 'Work Account'] THEN [Choose Work SIM]

👥 WHO IS PASS FOR?
Perfect for both Single and Dual SIM users!
✅ Professionals who value their privacy (doctors, freelancers, entrepreneurs).
✅ People who want to stop robocalls, telemarketers, and spam.
✅ Dual SIM users who want to keep work and private life strictly separated.

📥 NEED HELP SETTING UP?
Read the comprehensive guide at pass-app.com/en/guide. Don't want to build rules from scratch? Download ready-made rules (like a 'Spam Blocker') at pass-app.com/en/examples.

💰 READY TO TAKE CONTROL?
Try PaSS for 30 days completely free. No ongoing subscriptions, just a simple one-time purchase. Download today!

What’s new

Version 2.6.2 · Updated November 3, 2026

- Added phone number test field in rule editor - Added Farsi

User reviews

PANKAJ AMBEKAR
PANKAJ AMBEKAR
best call blocking app, no ads, no tracking
Chris M.
Chris M.
The #1 phone call firewall

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