1. Developer and acceptance
Barbell Velocity is developed, owned and published by Jakub Skiba, a private individual in Poland. Contact: kubux22@gmail.com. Installing or using the app means acceptance of these Terms. The app is intended for people aged 16 or older.
2. Current service
The app currently is completely free, has no advertising and has no paid functionality. It estimates vertical concentric barbell velocity from selected videos. It is not a training prescription, safety system, medical device or professional advice.
3. Licence and ownership
Copyright © 2026 Jakub Skiba. All rights reserved. The user receives only a limited, personal, non-exclusive, non-transferable and revocable licence for lawful personal use. No ownership is transferred.
The user may not copy, reproduce, distribute, sell, sublicense, publish, modify, create derivative works from, extract source code from, reverse engineer or commercially exploit the app except where mandatory law prohibits that restriction. Third-party and open-source components remain under their own licences.
4. No accuracy guarantee and risk
The app and every result are provided “as is”. Jakub Skiba gives no warranty or guarantee that tracking, repetition detection, calibration, velocity, acceleration, timing, range-of-motion or any other calculation is correct, complete, repeatable, available or fit for a purpose.
Values are estimates affected by recording and movement conditions. Users must verify results independently and must not rely on them where an incorrect value could cause injury, unsafe loading, loss or damage. Exercise involves risk; the user is responsible for equipment, surroundings, technique, load, supervision and decisions.
To the fullest lawful extent, use is at the user's own risk. Nothing excludes mandatory consumer rights or liability that cannot legally be excluded.
5. Offline operation and external contributions
The app has no Internet permission and no feature for sending or publishing videos or other data. Any development material separately arranged and manually sent outside the app is governed by a separate agreement and is not part of these app Terms.
6. Optional tips
A voluntary external tip is not a purchase and grants no content, feature, badge, priority, warranty or benefit. The complete app remains available without it. The external provider handles payment under its own terms.
7. Future changes
Jakub Skiba may change, suspend or discontinue the app and may release future updates, separate editions or features under different licence, advertising or payment terms, subject to law and Google Play rules. The present version is free and ad-free; that is not a promise that every future product or feature will remain so.
Terms may change prospectively with a revised date and reasonable notice of material changes. Acquired mandatory rights are not removed retroactively. A user who rejects new terms may stop using and uninstall the affected version.
8. Law
Polish law governs these Terms. Mandatory consumer protections and the right to bring claims in a user's place of residence remain unaffected where applicable.