Investigating the Effects of the Digital App Rheumabuddy4.1 in a Clinical RCT Set-up in Patients With Rheumatoid Arthritis

Inclusion Criteria: An individual must meet all of the following criteria to be enrolled in the study: 1. Diagnosed with RA according to the EULAR \& American College of Rheumatology 2. PGA level \>= 40mm 3. Age ≥ 18 years and \< 65 years 4. Motivated for the intervention 5. Willing and able to understand and participate in the study 6. DAS28-CRP ≤ 3.2. 7. Ability to use the RB4.1 app Exclusion Criteria: An individual will be excluded from the study if she meets any of the following criteria: 1. Dementia or other linguistic/cognitive/physical deficiency that prevents participation 2. Vision impairment that prevents the use of the devices and computer 3. Change in DMARD (within 8 weeks) 4. Chronic widespread pain (fibromyalgia) based on patient anamnesis/medical record. 5. Acute infections based on patient anamnesis/medical record. 6. Severe asthma based on patient anamnesis/medical record. 7. Severe COPD based on patient anamnesis/medical record. 8. Instable heart disease based on patient anamnesis/medical record. 9. Intensive physiotherapy outside standard care based on patient anamnesis/medical record. 10. Electrostimulation based on patient anamnesis/medical record. 11. Motivation training based on patient anamnesis/medical record. 12. Smoking based on patient anamnesis/medical record. 13. Fever based on patient anamnesis/medical record. 14. If pain/fatigue are considered a side effect judged by the treating physician. 15. Other autoimmune diseases based on patient anamnesis/medical journal. 16. Mental diseases based on patient anamnesis/medical record. 17. All other non-pharmacological therapies that may impact the course of RA judged by the treating physician. 18. Any comorbid condition, that in the opinion of the investigator would interfere with the conduction of the trial or the interpretation of the study outcome. 19. Previous use of health apps related to the RA disease.