Question 1

What is Calmido?

Accepted Answer

Calmido is an intelligent calling app that helps you distinguish genuine calls from spam. When someone calls you, you immediately see what other users report about this number before you answer.

Question 2

How does Calmido work?

Accepted Answer

When receiving a call, Calmido displays information about the caller based on community reports and verified data from legitimate organizations, helping you decide whether to answer.

Question 3

Is Calmido free to use?

Accepted Answer

Yes, the app is completely free. We may introduce premium features in the future, but the basic app will always remain free.

Question 4

How do I set Calmido as my default phone app?

Accepted Answer

Open Calmido and select it as default when prompted. If skipped, go to Settings > Apps > Default apps > Phone app, and select Calmido.

Question 5

What is the minimum age for using Calmido?

Accepted Answer

The minimum age for using Calmido is 18 years due to privacy regulations like GDPR. Guardian accounts for younger users are in development.

Question 6

Is my privacy protected?

Accepted Answer

Privacy is our top priority. We don't collect data we don't need, and all data is encrypted in transit and at rest.

Question 7

Do you listen to my calls or analyse my conversations?

Accepted Answer

No, never. We do not listen to your calls, analyse call metadata, or use your conversations for any purpose.

Question 8

What data do you collect?

Accepted Answer

In Guest Mode: unique device ID only. In Registered Mode: email address and phone number (hashed and encrypted), plus optional display name and avatar. Community reports about unknown numbers are collected without sharing personal data.

Question 9

What happens to my contacts?

Accepted Answer

Contacts remain private. Optional backup uses AES-256 encryption, with keys inaccessible to Calmido.

Question 10

Do I need to create an account?

Accepted Answer

No account required for Guest Mode. Registered accounts offer: better recognition with higher trust scores, contact backup and restoration, authenticated calls with members, enriched caller context, and community reporting capabilities.

Question 11

What's the difference between Guest Mode and Registered Mode?

Accepted Answer

Guest Mode provides immediate access to spam detection and reporting without account creation. Registered Mode (free account with email and phone) adds: secure member-to-member call verification through crypto handshake, encrypted backup/restore, and higher starting CallRank of 4 instead of 3.

Question 12

How do I backup and restore my data?

Accepted Answer

Registered Mode users get automatic, fully encrypted backups. Log into a new device to restore backed-up data. Guest Mode users can uninstall to remove local data.

Question 13

How do I delete my account?

Accepted Answer

Delete through App settings under Account > Delete account, or via the web at the Delete Your Account page. This permanently removes all data.

Question 14

What is a display name?

Accepted Answer

A display name is a public identifier linked to your phone number. It helps other people recognize who's calling them.

Question 15

Is my display name private?

Accepted Answer

Display name is stored encrypted by default, accessible only to you. It's shared securely during member-to-member calls and through an approved directory service for other calls.

Question 16

Where is my display name shown?

Accepted Answer

Appears in member-to-member calls and in directory services for non-member calls (only approved information).

Question 17

Why do I need a display name?

Accepted Answer

Display names significantly improve the chances of unknown callers being identified by recipients.

Question 18

What are the rules for display names?

Accepted Answer

Must be 4-40 characters; no identity theft, malicious content, emoticons, or special characters (letters, digits, hyphens, spaces only; non-western character sets supported).

Question 19

Can I change my display name?

Accepted Answer

Yes, but with a waiting period (4 hours to 2 days) to prevent abuse.

Question 20

Can someone else have the same display name as me?

Accepted Answer

Yes, display names are not unique. Multiple people can use the same name.

Question 21

How does the community trust system work?

Accepted Answer

Users share Call Reports (positive or negative with categories). Phone numbers receive CallRank scores (1-5) based on at least 2 Call Reports for reliability. Anonymized statistics only are stored.

Question 22

How do I report a spam call?

Accepted Answer

After a call ends, go to call history or notification. Negative reports require minimum 5-second call duration; positive reports require 30 seconds. Reports can be created within 48 hours with up to 3 negative categories selected. Option to block included.

Question 23

Can I block specific numbers?

Accepted Answer

Yes, block option available during Call Report creation or directly from call history.

Question 24

What happens if I receive a call from a number not in the database yet?

Accepted Answer

Fewer than 2 Call Reports shows basic info (number and location). CallRank starts at 3 (neutral) or 4 for Calmido users. You can be first to report.

Question 25

What if I see an incorrect report about a number?

Accepted Answer

Submit your own report with correct information. Multiple reports needed for impact. Own number disputes available after registration/verification with manual Calmido assessment.

Question 26

How accurate is the spam detection?

Accepted Answer

Accuracy improves with user participation. Detection uses: community Call Reports, verification status, public databases, and call patterns. System detects suspicious reporting patterns and limits one report per number.

Question 27

Can I undo a report if I made a mistake?

Accepted Answer

Yes, create a new Call Report for the same number to replace the previous one.

Question 28

What are the different caller types and classifications in Calmido?

Accepted Answer

Caller Types:

Personal Caller: Contacts from your contact list.
Member Caller: Registered, verified Calmido user with CallRank starting at 4.
Unknown Caller: Not in contacts, unknown to system, shows number but no additional info; CallRank of 3.
Anonymous Caller: No phone number shown; cannot be called back or reported.

Classifications:

Reported Caller: Numbers with positive or negative community reports.
Blocked Caller: Numbers you've blocked.
Locked Caller: Member with temporarily locked account (usually due to lost/stolen phone).

Question 29

Which devices and platforms does Calmido support?

Accepted Answer

Currently available for Android via Google Play Store with standard mobile phone subscription. An iOS (iPhone) version is on our roadmap.

Question 30

In which countries is Calmido available?

Accepted Answer

Currently testing in the Netherlands for users with Dutch mobile phone subscriptions before expanding.

Question 31

Does Calmido work with dual SIM cards?

Accepted Answer

Yes, Calmido works on phones with two active SIMs. For outgoing calls, you can select your default SIM card in Settings.

Question 32

Does Calmido affect my battery life?

Accepted Answer

Designed to be energy-efficient with minimal background impact. Report unusual battery drain for investigation.

Question 33

Does it use mobile data? How much?

Accepted Answer

Uses minimal data (typically kilobytes per call) to check caller information; negligible impact on limited plans.

Question 34

Can organizations register their phone numbers?

Accepted Answer

Soon, legitimate organizations can register their phone numbers with Calmido. This allows them to provide verified information.

Frequently Asked Questions

Getting started

Privacy and security

Account and settings

Display name

Using Calmido

Technical requirements

For organizations