Managing your lists
JSS CallBlocker centers around two lists: Whitelist and Blacklist.
- Whitelist: always allow calls from these numbers.
- Blacklist: block calls from these numbers.
- Prefix blocking: enter partial numbers (e.g.,
224
) to block ranges.


Tip: Swipe sensitivity has been reduced to prevent accidental deletes. If you delete by mistake, use the Undo prompt.
Using filters
Filters make it easier to manage and view your lists:
- Known Contacts toggle: show/hide numbers already in your Contacts during import.
- Hits only: display only numbers that have triggered blocks.
- Search box: quickly find numbers in either list.
Undo delete & haptics
When you swipe to remove a number:
- You’ll feel a light haptic vibration confirming the action.
- A snackbar appears at the bottom with an Undo button.
- Tapping Undo restores the entry immediately.
Encrypted backups
You can backup and restore your whitelist/blacklist securely:
- Backups are encrypted and stored on your device.
- Hit counters are not restored to give you a fresh start on statistics.
- Restore will overwrite existing lists (except counters).

Clearing counters
Track how many calls have been blocked globally. If you’d like to reset:
- Go to Settings → Clear Blocked Call Counter.
- Confirm the action in the popup dialog.
Premium features
- Unlimited whitelist and blacklist entries.
- Block Unknown numbers (not in Contacts).
- Block Anonymous numbers (hidden caller ID).
Premium is a one-time purchase. No ads. No subscriptions.
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Last updated 2025-08-18
See also: Privacy Policy