EviBody: a personalised digital program to support healthy habits and well-being
Effectiveness and Theory-based Evaluation of a Personalised Digital Intervention (EviBody) for Healthy and Sustained Lifestyle Behaviours and Well-being Among Adults
This project will test whether the EviBody app helps adults improve and maintain healthy eating, physical activity, mental health, and overall well‑being compared with people not using the app.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 1500 (estimated) |
| Ages | 18 Years and up |
| Sex | All |
| Sponsor | Sophiahemmet University Academic / other |
| Locations | 1 site (Stockholm) |
| Trial ID | NCT05973383 on ClinicalTrials.gov |
What this trial studies
This is a real-world, quasi-experimental observational project comparing three membership levels of the EviBody app (basic, standard, premium) with a non-randomised control group from the general population. Adults choose their membership level at enrolment and all participants complete seven questionnaires over 24 months while researchers extract anonymised app analytics. Primary analyses focus on changes in well‑being and lifestyle behaviors at six months and maintenance up to 24 months, with subgroup analyses by sociodemographic factors and dose–response by membership level. The protocol also examines whether engagement, motivation, self‑efficacy, and perceived barriers mediate observed effects.
Who should consider this trial
Good fit: Ideal participants are adults (≥18 years) who consent to the research, with app arms requiring sign-up to EviBody (typically via electronic identification) and primary analyses excluding those with very high baseline well‑being (>70).
Not a fit: People already using another behaviour‑change digital product, those with baseline well‑being scores above 70 (excluded from primary analyses), or users discharged for violating app terms are unlikely to benefit from this evaluation.
Why it matters
Potential benefit: If successful, the intervention could provide an accessible, personalised digital way to help many adults adopt and sustain healthier behaviors and better mental well‑being.
How similar studies have performed: Prior digital behaviour‑change interventions have shown mixed but promising results for lifestyle and mental health, while fully personalised, AI‑supported apps remain a relatively new approach with limited long‑term real‑world evidence.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria (intervention arms): * adults ≥18 years * signing up for the app EviBody using electronic identification * consent to the research study Inclusion Criteria (controls): * adults ≥18 years * consent to the research study Exclusion Criteria (intervention arms): * individuals who are discharged from the app due to refracting the terms of the service, * is currently using a digital product that is explicitly designed to support behaviour change, * subjects scoring \>70 on well-being will be excluded from the primary analyses, * subjects who appear as friends, colleagues, or family with anyone in the research or owner group will be excluded. Exclusion Criteria (controls): * is currently using a digital product that is explicitly designed to support behaviour change, * is found to be a user of EviBody, * subjects scoring \>70 on well-being will be excluded from the primary analyses, * subjects who appear as friends, colleagues, or family with anyone in the research or owner group will be excluded.
Where this trial is running
Stockholm
- Sophiahemmet University — Stockholm, Sweden (Recruiting)
Study contacts
- Principal investigator: Jenny Rossen, PhD — Sophiahemmet University
- Study coordinator: Jenny Rossen, PhD
- Email: jenny.rossen@shh.se
- Phone: +4684062985
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.