App legal
Instructions for use: B⁴ App
Version 2.0 · As of October 2026.
Thank you for using the B⁴ App. The app supports your training between appointments: for upright posture, good mobility and less tension, from neck to lower back, every day. We are happy to answer questions in the app chat or at app@b4neuroperformance.com. Please read these instructions and the medical notice in full before your first session.
1. About the app
The app was developed by PD Dr. med. habil. Ama Kyeremaa Finjap, neurosurgeon, with a team of doctors, sports scientists, physiotherapists and engineers. It turns current guidelines and clinical experience into short personal training sessions. Based on your feedback, our team gives recommendations for relaxation, mobility and strength. You have access to an exercise diary, chat with our therapists and appointment booking. If your condition gets worse, we recommend a video consultation or an appointment at the institute.
2. Purpose and target group
The app provides guided exercises to relieve and prevent tension and complaints of the musculoskeletal system, with a focus on the spine. It is intended for adults with acute or recurring back complaints and for anyone who wants prevention, improved posture and mobility or sustained everyday performance. Typical areas include neck and cervical spine, thoracic spine, lower back, posture weakness, muscular imbalance and gait stability.
3. Requirements
At first use you confirm that you are at least 18, accept the Terms and consent to the processing of your health data in line with the privacy policy. Before you start, a medical consultation, in person or by video, confirms that the app is suitable for you. Your general health must be stable. If a contraindication applies, train only if our team or your doctor expressly considers the exercises safe.
4. Recommended use
- Frequency: daily, at least three days a week, unless your doctor advises otherwise.
- Session length: about 10 to 20 minutes.
- Plan period: about 3 months. If you want to continue, we adjust your plan in a closing consultation.
5. Safety and side effects
- Use the app only if you understand the instructions in language and content.
- Train on a flat, non-slip surface with enough space.
- Stop if you feel pain, dizziness or discomfort, and report it in the feedback.
- We currently know of no side effects when the app is used as intended.
6. Our approach
- Personal: anatomy, functional connections, complaints, work, sport and daily life shape your recommendations.
- Dynamic: daily life, pain and mobility change, so your feedback continuously shapes the plan.
- Interdisciplinary: doctors, sports scientists and physiotherapists at the institute review your data and adjust your plan.
7. How the app works
- Account: register with your email address. We use it for activation and security messages, never for advertising.
- Training plan: under Sessions you see your plan, with past weeks in grey, the current week in blue and upcoming weeks in green.
- Daily session: videos with spoken guidance. You can pause, skip exercises and adjust speed and repetitions.
- Feedback: after each session you rate the exercises and report new complaints. The team adjusts your next recommendations accordingly.
- Relaxation: breathing and relaxation exercises for body awareness and mental recovery.
- Knowledge: short pieces on health and movement.
- Chat: direct contact with our therapists or technical support.
- Profile: active days, completed exercises, weekly goals, reminders, exercise diary and membership.
- Questionnaires: at set intervals you record your change and update your areas of complaint.
8. Technical requirements
About 300 MB free storage, iOS 16.0 or Android 7.0 or later, and a stable internet connection.
9. Privacy
The app complies with the GDPR and its servers are in Germany. Full details are in the privacy policy.
Contact
Privatpraxis/-institut Dr. KAF, Europastr. 4, 67433 Neustadt an der Weinstraße, Germany · app@b4neuroperformance.com · +49 6321 96386-25.
If you notice your health getting worse in connection with your training, contact us immediately. We will send you a paper copy of these instructions on request.