Mika is a smartphone app for adults living with cancer. It offers symptom and side-effect tracking, medication reminders, expert-reviewed information, and guided meditations and themed programmes for mental wellbeing. It is available from the Apple App Store and Google Play. According to the publisher, Mika is a CE-marked Class IIa medical device under the EU Medical Device Regulation, and patients of certain pharmaceutical partners can reach a separate area with an access code.
The app is published by Outcomes4Me Germany GmbH, based in Berlin, a subsidiary of the US company Outcomes4Me, which acquired the app in 2025. The publisher states that the app is fully compliant with the GDPR and that personal data is not disclosed to third parties; partners receive only aggregated, anonymised data. The website does not state where data is stored. For a European organisation, the operating company and its data-protection commitments are in the EU; the US parent company and the hosting location should be checked before procurement.