CallFortis
Stops Spam. Brings Peace.
CallFortis is a spam call blocker for Android. It runs entirely on your phone. It has no accounts, no cloud and no uploaded contacts. You decide who gets through.
Why CallFortis?
Most call blockers want your contacts, your call history and an internet connection. CallFortis doesn't. It uses Android's built-in call-screening system to check each incoming call on the device and reject or silence it before it rings.
Features
- One-tap protection: a big switch on the home screen, plus a Quick Settings tile and a home-screen widget. The widget shows how many calls were blocked today.
- Block numbers: add a number by hand, pick a contact, or pick from your recent calls. You can add a reason and choose to reject or silence the call.
- Patterns: block a whole range at once, such as every number starting with 1900, a set number of digits, or a custom regular expression. Patterns only catch strangers and never block your contacts.
- Temporary blocks: block for 1 day, 7 days, 30 days or forever.
- Scheduled rules: block only at certain hours.
- Quiet hours: at night or during work, only your contacts and Trusted Numbers ring. Everyone else is silenced. Set up exceptions for the people who must always reach you.
- Trusted Numbers: numbers that always ring, whatever other rules say.
- Contacts-only mode: silence everyone who isn't saved in your phone.
- No-caller-ID blocking: optionally block hidden and private numbers.
- Frequent-caller detection: spots unknown numbers that keep calling and hanging up, so you can block them all in one tap.
- Smart spam detection: a built-in heuristic that flags suspicious calls.
- Pause protection: pause for 30 minutes, 1 hour, 8 hours or a custom time, and it resumes by itself.
- Blocked-call history: see what was stopped and why. Add a caller to Trusted Numbers or unblock them from the log.
- Backup and restore: daily versioned auto-backups and encrypted export, so you can move to a new phone without losing your lists.
- Custom notification sounds.
Privacy first
- Everything stays on your phone. Nothing is uploaded.
- Contacts access is optional. It is used only to warn you before you block someone you know, and to let known people through.
- Call-log access is optional. It is used only to let you pick a recent caller.
Free and Premium
| Free | Premium | |
|---|---|---|
| Blocked numbers and patterns | Up to 20 | Unlimited |
| Trusted Numbers | Up to 10 | Unlimited |
| Quiet-hours schedules | 1 | Multiple |
Core call blocking is free. Premium is a one-time upgrade for larger lists. (Edit this to match your actual pricing.)
How to set it up
- Install CallFortis and open it.
- Tap Enable Protection and set CallFortis as your caller ID & spam app when Android asks.
- Optionally allow Contacts access, so people you know are never blocked.
- Optionally allow background access, so protection keeps working when the app is closed.
- Add your first block, or let it suggest frequent callers.
FAQ
Which Android versions are supported?
Android 10 and above.
Will it block my contacts?
Patterns never block saved contacts. Only a number you add yourself can block a contact, and the app warns you first.
Does it work when the app is closed?
Yes. Android runs the screening service in the background. Allow background access during setup to be safe.
Does it collect my data?
No. Your block lists, history and settings stay on your device.
Contact and feedback
Found a bug or want a feature? Email androcyborg@gmail.com or leave a review on Google Play.
© 2026 AndroCyborg. CallFortis