Hoia protect yourself and your closest ones

With the HOIA mobile app, you can quickly find out about possible close contact with a COVID-19 infected person, allowing you to take steps to protect your own health and the health of others.

Download the app and help install it for your closest ones as well

Download the app from Apple App StoreDownload the app from Google Play

Let’s protect ourselves and our closest ones

The app notifies you if you have been in close contact with an infected person. You can also inform others if you have become ill. By using the app, you contribute privately and securely to reducing the number of infected people.

Private and secure

Using the app is private and secure. The notifications sent do not tell you when, for how long and where you came in contact with an infected person, so it is not possible to identify who was the infected one.

Share and help others install the app

If you care about the well-being of yourself and your closest ones and the whole of Estonia, then you can do a lot of good by using the app. In order to maximise the benefits, it is a good idea that as many people as possible would use the app. Share information with your friends and closest ones as well and, if necessary, help them install the app.

Share the HOIA app on social media

The more people use this app, the more effective it is

How does HOIA function?

  1. The app generates unique anonymous codes

  2. Nearby phones exchange codes with each other

  3. By confirming your infection with the HOIA app, the anonymous codes on the device are uploaded to a central server

  4. Your phone regularly downloads anonymous codes from the infected people

  5. The phone checks if you have been in close contact with an infected person

  6. When a close contact is detected, the app will notify you

Questions and answers


Instructions for use

Privacy and security

Technical issues


Did any of your questions go unanswered?

Please contact us by sending an email to info@sm.ee and we will reply as soon as possible.


The consortium unites 12 Estonian companies who are experts in design, software development and security.

TEHIK, Fujitsu, Cybernetica, Heisi, Guardtime, FOB Solutions, Mooncascade, Icefire, mobilab, Velvet, Sotsiaalministeerium, Iglu, ASA Quality Services, Bytelogics