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SPECIFICTION
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Call Insider

callinsider.com

Free plan WebAndroid
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Spec score 8.0 #13 of 41 in Call blocker apps

What it is

Call Insider is a free caller-identification service available on Android and the web. It helps people assess unknown phone numbers by showing ratings during calls or in a pop-up. The mobile app uses a database with more than 300 million identified numbers, drawing data from more than 100 websites. A downloadable database covering more than 100 countries supports lookups without an internet connection. Users can rate numbers, read other users’ ratings, see yearly interest in a number, and sometimes view a landline location. The service is intended for calls such as telemarketing, surveys, courier contacts, and office calls. Free registration provides fewer ads, editable rating history, reply notifications, more daily comments, and easier reporting of harmful comments. Call blocking for potentially harmful and unsaved numbers is described as in development. The service was created in the Czech Republic in 2011.

Spec sheet

Purpose
Call Insider is a free service for identifying unknown phone numbers and sharing experiences about nuisance and useful callers.Read 8 Oct 2026 · callinsider.com
Audience
The service is for people seeking to identify callers and judge whether a call is desirable, including telemarketing, survey, courier, and office calls.Read 8 Oct 2026 · callinsider.com
API
The FAQ says Call Insider does not provide an API and has no plans to provide one.Read 8 Oct 2026 · callinsider.com
Privacy
The site says the app cannot access the user’s phone number and does not send it anywhere; when requesting a rating, it sends the queried phone number in anonymized form without call history, contacts, names, or timestamps.Read 8 Oct 2026 · callinsider.com
Support
The app listing provides [email protected] as its support email.Read 8 Oct 2026 · play.google.com
Headquarters
Prague, Czech RepublicRead 28 Sep 2026 · callinsider.com
Founded
2011Read 28 Sep 2026 · callinsider.com
Account benefits
Free registration provides fewer ads, editable rating history, reply notifications, more daily comments, and easier reporting of harmful comments.Read 8 Oct 2026 · callinsider.com
Call blocking
The website describes blocking potentially harmful and unsaved numbers as in development.Read 8 Oct 2026 · callinsider.com
Caller identification
The app can show a phone number rating on a dedicated call screen or in a pop-up during a call.Read 8 Oct 2026 · callinsider.com
Community ratings
Users can rate unknown numbers and view other users’ ratings, yearly interest in a number, and sometimes its landline location.Read 8 Oct 2026 · callinsider.com
Contact handling
The Google Play listing says contacts are used only to distinguish known from unknown numbers and are not saved or shared.Read 8 Oct 2026 · play.google.com
History and origin
The service says it was created in 2011 in the Czech Republic.Read 8 Oct 2026 · callinsider.com
Moderation limits
The FAQ says the forum is only partly moderated because thousands of comments are posted daily, and comment credibility cannot be fully ensured.Read 8 Oct 2026 · callinsider.com
Offline lookup
The app offers a downloadable phone number database covering more than 100 countries for identification without an internet connection.Read 8 Oct 2026 · callinsider.com
Phone database
The mobile app says its database contains more than 300 million identified phone numbers, using data from more than 100 websites.Read 8 Oct 2026 · callinsider.com

Plans and prices

Call Insider Free Completely free for everyone without restrictions · no ads Read 8 Oct 2026 · callinsider.com

Every Call Insider plan and price →

Strong points and limits

Strong points

  • Free plan with no listed restrictions
  • Database exceeds 300 million identified numbers
  • Offline database covers more than 100 countries
  • Ratings appear during calls
  • Available on Android and web

Limits

  • Call blocking is still in development
  • Community comments are only partly moderated
  • No API is provided

Who it suits

It suits people who need to identify unknown callers and judge whether calls from businesses or other numbers are desirable. Android users can also use offline lookup and community ratings.

Verdict

Call Insider combines caller identification, offline lookup, and community reports at no charge. Its partly moderated forum and absent API matter if you need highly controlled data or integrations.

Where Specifiction places it

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