01
Flexible blocking rules
Block by starts with, ends with, contains, regex, or number length. Rules can be paused without deleting them.
Namode Studio Android Utility · Coming soon
CallStopper
A focused Android blocker for people who know spam does not always come from one number. Create smart rules by prefix, suffix, contains, regex, or length, then let CallStopper reject matching calls before they break your day.
Android 10+
Local-first
Call Screening
Vietnamese + English
Focused by design
One job, done completely.
CallStopper follows Namode Studio's lean software philosophy: no bundled clutter, no account wall, just the controls needed to stop noisy calls.
02
Safer exceptions
Skip saved contacts and add custom whitelist numbers so important calls keep getting through.
03
Clear block history
See blocked calls, matched rules, timestamps, and add a blocked number to the allow list in one tap.
04
Import and export
Back up rules and exceptions as JSON so setup can move with you without needing a cloud account.
Call flow
Rules run before the ring.
- 1Incoming call arrivesAndroid passes the call through the system Call Screening role.
- 2Contacts and whitelist are checkedKnown callers and manual exceptions are allowed first.
- 3Active patterns are matchedOnly active rules are evaluated against the normalized number.
- 4Spam is rejected and loggedMatched calls are rejected and recorded in the in-app history.
Local-first privacy
Your rules stay on your device.
The current app build stores rules, whitelist entries, preferences, and block history locally using Android storage. Export is user initiated.
No account required
CallStopper is designed to work without login, tracking profiles, or a remote dashboard.
Permission scoped
Call Screening powers call blocking. Contacts are used only to avoid blocking people you already know.
Transparent policies
Privacy and terms are written as product pages so they are easy to review before installing.
FAQ
Built for practical blocking.
Does it block SMS too?
CallStopper can hide matching SMS notifications when notification listener permission is granted. It does not delete messages from your inbox.
Will it block every spam call?
No blocker can guarantee that. CallStopper focuses on patterns you control, so its accuracy depends on the rules you create.
Why does it need default caller ID and spam role?
Android requires the Call Screening role before any app can reject incoming calls at the system level.
Can I move my setup?
Yes. Export creates a JSON backup of rules and exceptions. Import restores them on the same or another device.
Release track
Contact Namode Studio
Ready for internal testing.
The Android build passes local, lint, release, bundle, and emulator smoke tests. Public release will follow final Play Console review and physical-device validation.