Privacy Policy
Last updated: February 9, 2026
This Privacy Policy describes how BJJ Notes ("we," "us," or "our") collects, uses, and protects your information when you use our mobile application and related services. We believe in transparency and want you to understand exactly how your data is handled.
By using BJJ Notes, you agree to the collection and use of information in accordance with this Privacy Policy.
Automated Processing and AI Insights
BJJ Notes uses artificial intelligence to help you get more value from your training data. Our AI features include:
- Training summaries after you log a session
- Weekly and monthly recaps of your progress
- Game style analysis based on your training patterns
- Reflective insights and training reminders
What data does AI process? The AI may analyze your training logs, technique names, submissions and taps data, training duration, intensity, frequency, and any injury notes you choose to enter.
What AI does NOT do: Our AI does not score, rank, or predict your performance. It does not make any decisions that have legal or material effects on you. All AI outputs are informational and educational only—designed to help you reflect on your training journey.
We use third-party AI providers (which may include services like OpenAI, Anthropic, or Google) to power these features. These providers act as data processors on our behalf. Data shared with AI systems is anonymized to protect your privacy.
Health-Related Information
BJJ Notes allows you to optionally record injury information as part of your training logs. This feature is entirely voluntary.
How injury data is used: Any injury information you enter is used solely for:
- Personal journaling and progress tracking
- Training reflection and pattern awareness
- Inclusion in AI-generated summaries (if you have entered injury notes)
Important: BJJ Notes is a training journal, not a medical application. We do not provide medical advice, diagnosis, or treatment recommendations. The app does not process medical records or professional health assessments. If you have health concerns, please consult a qualified healthcare professional.
Interpretation and Definitions
Interpretation
The words of which the initial letter is capitalized have meanings defined under the following conditions. The following definitions shall have the same meaning regardless of whether they appear in singular or in plural.
Definitions
For the purposes of this Privacy Policy:
- Accountmeans a unique account created for You to access our Service or parts of our Service.
- Affiliatemeans an entity that controls, is controlled by or is under common control with a party, where "control" means ownership of 50% or more of the shares, equity interest or other securities entitled to vote for election of directors or other managing authority.
- Applicationrefers to BJJ Notes Progress Tracker App, the software program provided by the Company.
- Companyrefers to 4BK Software LTDA, Vicente Machado, 3041.
- Countryrefers to: Brazil
- Devicemeans any device that can access the Service such as a computer, a cellphone or a digital tablet.
- Personal Datais any information that relates to an identified or identifiable individual.
- Servicerefers to the Application.
- Service Providermeans any natural or legal person who processes the data on behalf of the Company. It refers to third-party companies or individuals employed by the Company to facilitate the Service, to provide the Service on behalf of the Company, to perform services related to the Service or to assist the Company in analyzing how the Service is used.
- Usage Datarefers to data collected automatically, either generated by the use of the Service or from the Service infrastructure itself (for example, the duration of a page visit).
- Youmeans the individual accessing or using the Service, or the company, or other legal entity on behalf of which such individual is accessing or using the Service, as applicable.
Collecting and Using Your Personal Data
Types of Data Collected
Personal Data
While using Our Service, We may ask You to provide Us with certain personally identifiable information that can be used to contact or identify You. Personally identifiable information may include, but is not limited to:
- Email address
- First name and last name
- Usage Data
Usage Data
Usage Data is collected automatically when using the Service.
Usage Data may include information such as Your Device's Internet Protocol address (e.g. IP address), browser type, browser version, the pages of our Service that You visit, the time and date of Your visit, the time spent on those pages, unique device identifiers and other diagnostic data.
When You access the Service by or through a mobile device, We may collect certain information automatically, including, but not limited to, the type of mobile device You use, Your mobile device unique ID, the IP address of Your mobile device, Your mobile operating system, the type of mobile Internet browser You use, unique device identifiers and other diagnostic data.
We may also collect information that Your browser sends whenever You visit our Service or when You access the Service by or through a mobile device.
Use of Your Personal Data
We use your data for the following purposes:
- To provide and maintain our Service, including to monitor the usage of our Service.
- To manage Your Account: to manage your registration as a user of the Service and give you access to different functionalities available to registered users.
- To generate AI-powered insights: your training data (anonymized) may be processed by AI systems to generate summaries, recaps, and reflective insights. Third-party AI providers may be used as data processors, with appropriate safeguards in place.
- For the performance of a contract: the development, compliance and undertaking of the purchase contract for the products, items or services you have purchased or of any other contract with us through the Service.
- To contact You: to contact you by email or push notifications regarding updates or informative communications related to the functionalities, products or contracted services, including security updates.
- To send automated notifications: some notifications are triggered based on your activity (such as training reminders). These are informational only and do not involve profiling, scoring, or ranking.
Data Storage and Security
Your data is stored on servers provided by Supabase, located in the United States. We implement appropriate technical and organizational measures to protect your personal data against unauthorized access, alteration, disclosure, or destruction.
When we use third-party service providers (including AI providers), we ensure they maintain appropriate security standards and act as data processors on our behalf.
Your Data Protection Rights
Depending on your location, you may have certain rights regarding your personal data:
- Right to access: You can view your training data within the app at any time.
- Right to deletion: You can delete individual training logs within the app. You can also request permanent deletion of your entire account and all associated data.
- Right to rectification: You can edit your training logs and profile information directly within the app.
To request account deletion or if you have questions about your data, please contact us using the information below. We will respond to your request within a reasonable timeframe.
Contact Us
If you have any questions about this Privacy Policy or how we handle your data, you can contact us:
- By email: contato@4bk.com.br
Your Privacy Choices
You can control how we collect and use your data. Use the settings below to customize your privacy preferences.
Privacy Settings
Manage how we collect and use your data. You can change these settings at any time.
Analytics Tracking
Allow us to collect anonymous usage data to improve our service