Last Updated: May 21, 2026
By downloading, installing, accessing, or using LeanLine (the “Licensed Application”), you agree to these Terms of Service and End User License Agreement (“Terms” or “EULA”). If you do not agree, please do not use the application.
You and the Developer acknowledge that this EULA is concluded between you and the Developer only, and not with Apple Inc. (“Apple”). The Developer, not Apple, is solely responsible for the Licensed Application and its content. This EULA does not provide usage rules for the Licensed Application that conflict with the Apple Media Services Terms and Conditions as of the effective date.
LeanLine is operated by Minjian Hu, an individual developer. For questions, complaints, or claims, contact: LeanLine@163.com.
The license granted to you for the Licensed Application is limited to a personal, non-transferable, non-exclusive license to use the Licensed Application on Apple-branded products that you own or control, and as permitted by the Usage Rules set forth in the Apple Media Services Terms and Conditions.
The Licensed Application may also be accessed and used by other accounts associated with the purchaser through Family Sharing or volume purchasing where permitted by Apple.
You may not copy, modify, reverse engineer, decompile, attempt to extract the source code of, sell, rent, sublicense, distribute, or create derivative works from the Licensed Application except where applicable law expressly permits such activity.
LeanLine is not intended for children below the minimum age required to use digital services or provide valid consent in their country or region. If you are under the age required to consent to data processing in your country, you may use LeanLine only with consent from a parent or legal guardian.
By using LeanLine, you represent that you meet these eligibility requirements and that your use of the app complies with applicable laws.
LeanLine is a fitness tracking and social motivation tool. It is not a medical device and is not intended to diagnose, treat, cure, prevent, or monitor any disease or medical condition.
LeanLine does not provide medical advice, diagnosis, treatment, nutrition advice, or weight-loss instructions. Any information, score, streak, chart, challenge, Squad leaderboard, or notification shown in LeanLine is for personal tracking and motivation only.
Always consult a qualified healthcare provider before making changes to your diet, exercise, weight-loss, weight-gain, or health regimen, especially if you have a medical condition, are pregnant, have a history of disordered eating, or are under medical supervision.
You are solely responsible for your health decisions and for using LeanLine in a safe and appropriate manner.
LeanLine includes optional social features, including friends, challenges, Squads, reactions, leaderboards, invite codes, profile avatars, nicknames, and shareable progress cards.
When you use these features, other users may see information such as your nickname, avatar, current streak, Squad membership, Squad role, Pro badge status, reactions, relative progress, logging activity, leaderboard position, and challenge or Squad cycle results.
LeanLine is designed so your actual body weight remains local to your device and is not uploaded to LeanLine servers. However, social features may display relative progress, such as weight lost or gained, percentage change, or habit-mode logging activity, such as how many times or days you logged weight. You understand that this information may still reveal trends about your body or habits.
You are responsible for choosing who you connect with, challenge, invite, or join in a Squad. Only accepting friend and challenge requests from people you trust, and only joining or sharing Squad codes with people you trust. Squad invite codes may be forwarded by other users, and LeanLine cannot control screenshots, recordings, saved images, or information shared outside the app by other users.
“User Content” means any content or information you submit, upload, display, send, or make available through LeanLine, including nicknames, avatars, Squad names, Squad background images, reactions, reports, invite messages, and shared cards.
You retain ownership of your User Content. By using LeanLine, you grant the Developer a limited, worldwide, non-exclusive, royalty-free license to host, store, process, display, reproduce, and transmit your User Content only as needed to operate, maintain, improve, secure, and provide LeanLine.
You are solely responsible for your User Content and for ensuring that you have the rights necessary to use and share it.
LeanLine has a zero-tolerance policy for objectionable content and abusive users. By using the app, you agree not to upload, share, send, encourage, or engage in any behavior that:
LeanLine provides features to block and report abusive users or inappropriate content. You may also contact LeanLine@163.com to report safety concerns.
We reserve the right, but are not obligated, to review, remove, restrict, or disable access to User Content or accounts that we believe violate these Terms, create legal risk, harm other users, or interfere with the operation of LeanLine.
We may suspend or terminate access to LeanLine, remove users from Squads, restrict social features, delete content, or take other appropriate action at our sole discretion and without prior notice where reasonably necessary to protect users, enforce these Terms, comply with law, prevent abuse, or protect the app.
Blocking a user may remove or limit your visibility to that user in LeanLine, but it cannot undo screenshots, recordings, saved content, or information already shared outside the app.
Your use of LeanLine is also governed by our Privacy Policy, available at:
https://leanlineapp.github.io/privacy
The Privacy Policy explains what information we collect, how we use it, how social features work, how relative progress and habit-mode logging activity may be shared, and how deletion requests are handled.
LeanLine may optionally integrate with Apple Health, Siri, Shortcuts, notifications, widgets, and other iOS system features.
HealthKit access is optional. If you grant HealthKit permission, LeanLine may read and write Body Mass data only for the purposes described in the Privacy Policy. LeanLine does not use HealthKit data for advertising, marketing, or sale to third parties.
You can manage or revoke Apple Health permissions at any time through iOS Settings.
LeanLine offers auto-renewing subscriptions and a one-time lifetime purchase option to unlock premium features.
LeanLine may change over time. We may add, modify, suspend, or remove features, including social features, Squads, challenges, sharing tools, notifications, or PRO features.
We may also suspend or discontinue the app or any part of it if needed for technical, legal, business, security, or operational reasons. Where practical, we will try to avoid unnecessary disruption, but we do not guarantee that any feature will remain available forever.
The Developer is solely responsible for providing maintenance and support services for the Licensed Application as specified in this EULA or as required under applicable law.
You and the Developer acknowledge that Apple has no obligation whatsoever to furnish maintenance or support services with respect to the Licensed Application.
THE APP IS PROVIDED “AS IS” AND “AS AVAILABLE” WITHOUT WARRANTY OF ANY KIND. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE DEVELOPER DISCLAIMS ALL WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, RELIABILITY, AVAILABILITY, SECURITY, AND NON-INFRINGEMENT.
The Developer is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. In the event of any failure of the Licensed Application to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price for the Licensed Application where applicable. To the maximum extent permitted by applicable law, Apple will have no other warranty obligation whatsoever with respect to the Licensed Application.
To the maximum extent permitted by applicable law, the Developer will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, including loss of data, loss of profits, personal injury, emotional distress, reputational harm, or damages arising from user conduct, social interactions, screenshots, shared content, challenge participation, Squad participation, or reliance on app information.
Nothing in these Terms limits liability where liability cannot be limited under applicable law.
You and the Developer acknowledge that the Developer, not Apple, is responsible for addressing any claims by you or any third party relating to the Licensed Application or your possession or use of the Licensed Application, including but not limited to:
The Licensed Application, including its design, software, graphics, trademarks, logos, text, and other content, is owned by the Developer or its licensors and is protected by intellectual property laws.
In the event of any third-party claim that the Licensed Application or your possession and use of the Licensed Application infringes that third party’s intellectual property rights, you and the Developer acknowledge that the Developer, not Apple, will be solely responsible for the investigation, defense, settlement, and discharge of such intellectual property infringement claim.
You represent and warrant that:
You agree to comply with all applicable laws when using LeanLine.
LeanLine may rely on third-party services, including Apple, Supabase, RevenueCat, and OneSignal. Your use of LeanLine may be subject to applicable third-party terms and policies.
You must comply with applicable third-party terms when using the Licensed Application, including Apple’s terms and your wireless data service agreement.
You and the Developer acknowledge and agree that Apple, and Apple’s subsidiaries, are third-party beneficiaries of this EULA. Upon your acceptance of these Terms, Apple will have the right, and will be deemed to have accepted the right, to enforce this EULA against you as a third-party beneficiary.
These Terms remain in effect until terminated by you or the Developer.
You may stop using LeanLine at any time. We may suspend or terminate your access to LeanLine if you violate these Terms, create risk or possible legal exposure, abuse other users, misuse social features, or otherwise use LeanLine in a way that may harm the app, users, or Developer.
Upon termination, your right to use LeanLine will end. Sections that by their nature should survive termination will survive, including provisions related to user conduct, privacy, intellectual property, disclaimers, limitation of liability, dispute-related terms, and Apple’s third-party beneficiary rights.
We may update these Terms from time to time. When we make material changes, we will update the “Last Updated” date and may provide additional notice where appropriate.
Your continued use of LeanLine after changes become effective means you accept the updated Terms. If you do not agree to the updated Terms, you should stop using LeanLine.
For any questions, complaints, claims, safety reports, or support requests regarding the Licensed Application, please contact the Developer at:
LeanLine@163.com