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Android Apps > Communication > KnownCalls - Whitelist calls
KnownCalls - Whitelist calls icon

KnownCalls - Whitelist calls

by Felenasoft Ltd. · Communication · Free
On Google Play since March 2024 · Data updated 2026-11-06

KnownCalls - Whitelist calls is made and published by Felenasoft Ltd. AppBrain is an independent app data site and isn't affiliated with Felenasoft Ltd. The app name, icon, screenshots and description belong to Felenasoft Ltd. and are shown as published on Google Play.

4.56
1,961 reviews
100,000+
Downloads
Free

Unknown calls blocker with a whitelist. No ads. No-Internet private and easy!

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Screenshots by Felenasoft Ltd., from the Google Play listing
View on Google Play

AppBrain's verdict

Loved by users
Rating on Google Play
4.56
1,961 ratings
Installs
200 thousand
Last updated
March 24, 2024
Ads
No ads
Size
N/A

KnownCalls - Whitelist calls has 200 thousand installs. Users love it: 4.6 stars from 1,961 ratings.

Official page on Google Play

Summary

KnownCalls is a privacy-first, ad-free call blocker that automatically rejects unknown numbers using only your device's contacts. It requires no Internet connection and offers a simple on/off blocking with a trusted whitelist to keep important callers through. With 100,000+ total downloads and 7K in the last 30 days, KnownCalls demonstrates steady demand for a lightweight, private way to stop robocalls.

Pros & Cons

  • Ad-free experience with no ads
  • Offline operation—no Internet required for blocking
  • Instant blocking of unknown numbers using your Contacts
  • Whitelist-based protection to ensure trusted callers go through
  • Only handles phone calls (SMS blocking requires a separate KnownCalls for SMS muting from the official site)

User feedback

Ratings and reviews on Google Play

Comments on KnownCalls - Whitelist calls for Android

★★★★☆ Jefherson Peneyra · Apr 5, 2026
Known Calls works well—blocked calls don’t ring and appear in logs. However, there’s a bug: if I turn off “Block calls not from Contacts” and turn it back on, spam calls go through. It only works again after clearing cache/data and setting it up again. Please fix this issue.
★★★★★ John Plocek · Oct 29, 2026
I was getting at least 40 scam calls a day. Even after I blocked those numbers, they would call back using a different number. I don't remember how long ago I started blocking all these numbers, but I looked at the blocked call list I had in my Android, probably over a 3-year period I had over 9,000 blocked numbers. I installed the app this morning, and I didn't get any spam calls. At least my phone did not ring, and I checked the app later, and it showed a blocked at least 10 calls.
★☆☆☆☆ Cathey Lynn D · May 13, 2026
Not working. I just received a call from Indiana not in my contacts, and it didn't block it
★★☆☆☆ rancid crawfish · May 22, 2026
Looks like it could work. But there's ZERO information on this app. It doesn't show any options to create a white list OR a black list. But there are options to block people on the black list and only allow calls from the white list. It even lets you know your white list is empty. But there's no way to make the god-damn list. And if there is, it isn't obvious or easy.
★☆☆☆☆ Mama M · Jul 13, 2026
This app may have worked in the past but not working in today's world. I gave this app about a week since it's not blocking any of my unknown calls. I even emailed them. I received no response. This app is still not working. The unknown calls are still coming through. I'm not sure what its purpose is except for occupying space on my phone.

Google Play Rating history and histogram

1.6K
140
39
58
120

Store listing

By Felenasoft Ltd., from Google Play
Description by Felenasoft Ltd. Written by the developer, not by AppBrain. Click to read.
KnownCalls is the new ad-free and absolutely free call blocker app for Android that helps fight spam calls while respecting your privacy.

!This app only works with calls. For work with text messages, download the KnownCalls' version with SMS muting from its official website.!

With KnownCalls your phone will automatically reject calls from numbers not in your Phone book. It will save you time wasted on answering spam calls, and make you an uninteresting target for fraudsters.

This simple app works against telemarketers, anonymous or hidden numbers, robocalls, spam or other unknown calls, and various kinds of scammers.

! The app is for those who don't want to (or need to) answer calls from any unknown numbers.

!! This is a free app that DOESN'T provide tech support. Please use our online resources and community to get answers to your questions. However, you can mail us your ideas of improvement.


==NO INTERNET CONNECTION REQUIRED==
The app doesn’t use external resources. It works solely with your device’s Phone book so your privacy is safe!
Perfect for those who care about their digital imprint.


==WHY KNOWNCALLS IS BETTER==
1. Spammers usually call from different numbers each time, so adding each number to a block list might prove ineffective – next time they might just use another number. But KnownCalls blocks all unknown call numbers so it's not a problem any more.

2. Rejection of unknown callers is instantaneous because KnownCalls uses your device’s Phonebook only. Other call blocker apps usually work with a delay so you might be among earliest recipients that spam calls still get through to before being flagged as spammers.

3. 100% free. No hidden payments.

4. Absolutely no ads.

5. Extremely easy to use. 1 option to enable/disable blocking.

6. KnownCalls does not collect or send personal data or information on your phone calls anywhere - unlike other apps that use spam databases in the Internet and send your calls there too.

7. Installs well on almost any contemporary Android device.

8. Has additional internal pass and block lists (only for numbers that you interacted with after you had started to use KnownCalls).


STOP annoying robocalls or buzzing from call centers, telemarketers and fraudsters that always distract you when you're busy, wake you up in the middle of the night, or intend to scam you.
Finally you can enjoy the silence – and be sure that trusted callers still get through!

Recommend KnownCalls to your family and friends – let them feel the tranquility of life without spam too!


==HOW IT WORKS==
* Download KnownCalls call blocker app from Google Play or our website and install it on your device.
* Turn on filtering with 1 click.
* Done! All unknown calls from numbers that are not in your Contacts or Favorites will be automatically rejected without bothering you.


==SPAM PROTECTION FOR EVERYONE==
The KnownCalls app is a perfect call blocker for

* Parental control: protect your kids by creating a whitelist of trusted numbers, and block calls from any other phone numbers.
* Public people: stop the flow of distracting phone calls while keeping accessibility for known callers.
* Businessmen: let KnownCalls automatically filter out spam call center buzzes, while still allowing calls from your Contacts.
* Senior protection: make sure scammers don’t take advantage of your elderly by blocking calls from any unknown numbers.


==RECAP OF KNOWNCALLS==
The KnownCalls app is the unique combination of privacy protection, easy functionality and availability. It is free of charge. No Internet accessibility required!
KnownCalls does not gather, store, send or share your personal information.

Use KnownCalls call blocker if you are worried about scammers that could fraud your seniors or children: block all unknown calls!


Accumulated effect: Even if you are assaulted with spam calls now, using KnownCalls will make you an uninteresting target for call centers over time.

Safety and technology

Found in the app by AppBrain
Ads
No ads
Price
Free
Libraries
36
App size
N/A
Needs Android
10+
Content rating
Everyone

Technologies used by KnownCalls - Whitelist calls

36 libraries
Subscribe to see full permission and library details
Trust & Safety: Privacy-focused call blocker that relies on the device’s Contacts and Favorites. It operates without Internet access and does not collect or transmit personal call data.

Releases

Updates seen on Google Play
Launched
March 2024
  • Jul 9, 2025Installs100,000+ installs
  • Sep 18, 2024Installs50,000+ installs
  • Mar 24, 2024New AppVersion in COMMUNICATION for Free
Show all changes Show fewer

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Installs

Tracked by AppBrain
Last 30 days
7 thousand
Per day
230
30-day average
Play install range
100+ thousand
Launched
March 2024

Installs over time

KnownCalls - Whitelist calls has been installed 200 thousand times. Over the past 30 days, it averaged 230 installs per day.

Rankings

Google Play top charts

Google Play Rankings for KnownCalls - Whitelist calls

This app is not ranked

About the app and developer

About KnownCalls - Whitelist calls

KnownCalls - Whitelist calls is a communication app developed by Felenasoft Ltd.

How many times has KnownCalls - Whitelist calls been downloaded?

KnownCalls - Whitelist calls has been downloaded 200 thousand times. In the last 30 days, the app was downloaded 7 thousand times.

What is the rating of KnownCalls - Whitelist calls?

KnownCalls - Whitelist calls is rated 4.56 out of 5 stars, based on 2 thousand ratings.

Is KnownCalls - Whitelist calls free?

KnownCalls - Whitelist calls is free. The last update was on March 24, 2024.

What are the requirements for KnownCalls - Whitelist calls?

KnownCalls - Whitelist calls requires Android 10+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since March 2024.

App Performance Report

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Developer information for Felenasoft Ltd.

Felenasoft Ltd.

googleapps@felenasoft.com

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Frequently asked questions about KnownCalls - Whitelist calls

Is KnownCalls - Whitelist calls free?

Yes. KnownCalls - Whitelist calls is free on Google Play.

Is KnownCalls - Whitelist calls still available?

Yes. KnownCalls - Whitelist calls is on Google Play, and the last update we saw was on March 24, 2024.

Does KnownCalls - Whitelist calls contain ads?

No. Google Play does not list KnownCalls - Whitelist calls as containing ads.

What Android version does KnownCalls - Whitelist calls require?

KnownCalls - Whitelist calls runs on Android 10 and higher.

Is KnownCalls - Whitelist calls suitable for children?

Google Play rates the content of KnownCalls - Whitelist calls as suitable for everyone.

How many times has KnownCalls - Whitelist calls been installed?

Google Play lists 100,000+ installs for KnownCalls - Whitelist calls.

How do people rate KnownCalls - Whitelist calls?

KnownCalls - Whitelist calls scores 4.56 out of 5 stars, from 1,961 ratings on Google Play.

Who made KnownCalls - Whitelist calls?

KnownCalls - Whitelist calls was developed by Felenasoft Ltd. It is listed in the communication category on Google Play.

What are the best alternatives to KnownCalls - Whitelist calls?

People looking at KnownCalls - Whitelist calls also look at these communication apps: Showcaller: Caller ID & Block, Call Blocker: Stop Spam Caller, AntiSpam: Call Blocker, Call Block: Filter and Blocker, Call Blocker - Robocall & Spam.

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