Need help with FightLens? Find answers or get in touch with us.
Record a short clip of your technique or select an existing video from your gallery. Tell us which technique it is, and our AI will evaluate your performance. You'll get a quality score, your main error, and a concrete fix. Your videos are never saved—only the text feedback is kept.
With an active subscription, you're entitled to a maximum of 7 analyses per day.
You can manage this in the app itself, under Profile > Subscription. You can cancel anytime; you'll keep access until the end of your current billing period. Subscriptions are managed through the App Store or Google Play, so you can also cancel from your account settings there.
Email us directly, and we'll help you as quickly as possible.
Contact supportLast updated: July 14, 2026
FightLens is an app that helps you improve your martial arts technique with AI feedback on your own training videos. Questions about privacy or your data? Email us at a.k.sarwarzade@gmail.com.
Account data: your email address and login credentials used to create your account. An account is required to use FightLens.
Video frames: when you submit a clip for analysis, we extract 10 individual frames. These are only processed during the analysis and are not stored afterward.
Analysis results: the technique, identified errors, suggested fixes, and confidence level of the analysis. Only text—no images.
Device ID: a randomly generated code created locally on your device that we use to enforce the daily analysis limit.
Your name: optional field stored only locally on your device. We neither see nor store it on our servers.
To manage your account and subscription.
To generate technique feedback based on your video.
To display your progress and statistics (such as streaks and levels).
To prevent abuse and enforce the 7 analyses per day limit.
Your account data, analysis results, and device ID are stored in a Supabase database in the EU (Frankfurt).
Your video clip and frames extracted from it are not stored on our servers. They are only processed during analysis and immediately deleted afterward.
For analysis itself, we send only the 10 individual image frames (never the original video, never audio) to Anthropic's Claude API, which acts as a processor on our behalf to generate your technique feedback. Anthropic does not use these frames to train AI models and provides the same level of data protection as FightLens itself. Before your very first analysis, the app explicitly requests your consent for this, separately from this privacy policy.
We only share data with parties necessary to operate the app: Supabase (database hosting) and Anthropic (AI processing of your frames during analysis, with the same protection level described above).
We never sell data to third parties. There are no ads and no tracking or analytics in the app.
Under GDPR, you have the right to access and deletion of your data. Email us at a.k.sarwarzade@gmail.com from your account email address, and we'll assist you.
FightLens is not directed at children under 13 years old. Minors may only use the app with permission from a parent or guardian.
We may update this privacy policy from time to time. The date at the top of this section shows when it was last modified.
Last updated: July 14, 2026
FightLens provides AI feedback on your martial arts technique based on short training videos that you record or select yourself. The app is intended as an informational tool for your training. You need an account and an active subscription to use FightLens.
FightLens costs €8.99 per month or €59.99 per year. Your subscription entitles you to a maximum of 7 analyses per day.
Payments and cancellations are handled through your App Store or Google Play account. You can cancel at any time; you'll retain access through the end of your paid period.
You are responsible for keeping your login credentials confidential.
Martial arts and physical training involve risks and are undertaken at your own risk. FightLens AI feedback is not a substitute for a qualified coach, doctor, or physical therapist. Always consult a professional if you experience injuries, pain, or have doubts about any exercise or technique.
AI analyses may contain errors or miss things. We do not warrant that the feedback is always correct, complete, or suitable for your situation, and we make no guarantee of specific results from using the app.
Abuse, scraping, or circumventing the analysis limit is not permitted.
Only upload clips that you have the rights to and that contain only yourself or people who have consented.
The app itself and its contents are owned by FightLens. Your videos always remain yours.
To the extent permitted by law, FightLens is not liable for any damage arising from the use of the app or the following of any feedback provided.
These terms of use may change from time to time. If you continue using the app after a change, you agree to the updated terms.
Questions about these terms? Email us at a.k.sarwarzade@gmail.com.