Y90 Dosing

Terms of Use & End User License Agreement

Effective 7 September 2026 · Last updated 7 September 2026

Read this before using the app

Y90 Dosing is an educational reference tool for qualified healthcare professionals. It is not a medical device, it is not cleared or approved by any regulatory authority, and it must not be used as the sole basis for any clinical decision. Every result must be independently verified before it informs patient care.

1.Agreement and acceptance

These Terms of Use and End User License Agreement ("Agreement") are a binding agreement between you and Abhishek Goswami ("Developer", "we", "us") governing your use of the iOS application Y90 Dosing ("the App").

When you first open the App, it presents a summary of this Agreement and requires you to accept it before the App can be used. By accepting that summary, or by otherwise downloading, installing, or using the App, you agree to this Agreement in full, including the terms set out here that are not restated in the in-app summary.

If you do not agree, do not use the App, and delete it from your device.

2.License grant

Subject to your compliance with this Agreement, we grant you a limited, personal, non-exclusive, non-transferable, non-sublicensable, revocable license to install and use the App on an Apple-branded device that you own or control, for your own educational and professional reference purposes, as permitted by the App Store Terms of Service.

This is a license, not a sale. All rights not expressly granted are reserved.

3.Educational purpose — not a medical device

The App is an educational and informational reference tool. It performs arithmetic on values that you enter, using published dosimetry formulations, and displays the result.

The App is not a medical device and has not been cleared, approved, or certified by the United States Food and Drug Administration or by any other regulatory authority.
The App is not intended to diagnose, treat, cure, mitigate, or prevent any disease or condition.
The App does not provide medical advice, and does not create a physician–patient, provider–patient, or professional–client relationship between you and the Developer.
The App does not prescribe, recommend, or determine any treatment, dose, or administered activity. It reports the output of a calculation you have specified.

4.No affiliation with any manufacturer

The Developer is an independent individual and is not affiliated with, endorsed by, sponsored by, or in any way connected to Boston Scientific Corporation, Sirtex Medical Limited, or any other manufacturer, distributor, or vendor of yttrium-90 microsphere products.

TheraSphere® is a registered trademark of Boston Scientific Corporation or its affiliates. SIR-Spheres® is a registered trademark of Sirtex SIR-Spheres Pty Ltd. Those names, and any other product or company name that appears in the App or in this Agreement, are used solely to identify the product to which a published calculation applies. Such use does not imply any association, sponsorship, or endorsement.

The App implements methods, constants, and thresholds drawn from publicly available sources — peer-reviewed literature, published regulatory text, and the manufacturers' own publicly available labeling. The Developer has no access to proprietary manufacturer data and receives no support, information, funding, or compensation from any manufacturer.

5.Professional responsibility and independent verification

The App is intended for use only by qualified healthcare professionals who are trained and credentialed in radioembolization and who are capable of independently evaluating its output.

You agree that:

You will independently verify every calculation before it is used in connection with the care of any patient.
You will confirm all physical constants, dose limits, and formulations against the current manufacturer's package insert for the product in use and against your institution's own protocols, which take precedence over anything shown in the App.
You will consult with a qualified physician and apply your own clinical judgment before making any medical decision, and will not rely on the App as a substitute for either.
Sole responsibility for all clinical decisions, prescriptions, and administered activity rests with the treating clinician and the treating institution.

6.No protected health information

The App is not a HIPAA-compliant system and provides no safeguards suitable for protected health information. You agree not to enter patient names, medical record numbers, dates of birth, or any other individually identifying information into the App. You are solely responsible for any information you choose to enter and for any consequences of doing so.

7.Accuracy and limitations

We have made reasonable efforts to implement published methods correctly and to test them. Nevertheless, software may contain errors, published constants and thresholds may change, and product labeling may be revised. We do not warrant that the App is free of defects or that its output is correct, current, or suitable for any particular case. The App is provided for reference only and its output is not a substitute for independent calculation and verification.

8.Restrictions

You may not: copy, modify, translate, or create derivative works of the App; reverse engineer, decompile, or disassemble the App except to the extent that applicable law expressly permits despite this limitation; rent, lease, lend, sell, redistribute, or sublicense the App; remove or obscure any proprietary notice or disclaimer; or use the App in any manner that violates applicable law or professional obligation.

9.Intellectual property

The App, including its source code, design, text, and all other content, is owned by the Developer and is protected by copyright and other intellectual property laws. Clinical formulations, constants, and published methods implemented in the App remain the property of their respective sources and are used for reference and educational purposes. Third-party trademarks referred to in the App remain the property of their respective owners, as set out in section 4.

10.No charge, no obligation to support

The App is provided free of charge. We are under no obligation to provide support, maintenance, updates, corrections, or continued availability, and may modify, suspend, or discontinue the App at any time without notice. Support enquiries may be directed to the address in section 17, without any commitment as to response or resolution.

11.Disclaimer of warranties

THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, WE DISCLAIM ALL WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE APP WILL MEET YOUR REQUIREMENTS, THAT ITS OPERATION WILL BE UNINTERRUPTED OR ERROR-FREE, OR THAT ANY OUTPUT WILL BE ACCURATE OR RELIABLE.

SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF CERTAIN WARRANTIES, SO SOME OF THE ABOVE EXCLUSIONS MAY NOT APPLY TO YOU.

12.Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE DEVELOPER BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR ANY PERSONAL INJURY, DEATH, LOSS OF DATA, LOSS OF PROFITS, OR BUSINESS INTERRUPTION, ARISING OUT OF OR RELATING TO YOUR USE OF OR INABILITY TO USE THE APP, HOWEVER CAUSED AND UNDER ANY THEORY OF LIABILITY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE DEVELOPER'S TOTAL AGGREGATE LIABILITY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE APP SHALL NOT EXCEED FIFTY UNITED STATES DOLLARS (US$50).

SOME JURISDICTIONS DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OR FOR PERSONAL INJURY, SO SOME OF THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. NOTHING IN THIS AGREEMENT LIMITS LIABILITY THAT CANNOT BE LIMITED UNDER APPLICABLE LAW.

13.Indemnification

You agree to indemnify, defend, and hold harmless the Developer from and against any claims, liabilities, damages, losses, and expenses, including reasonable legal fees, arising out of or in any way connected with your use of the App, your breach of this Agreement, your violation of any law or professional obligation, or any clinical decision made by you or on your direction.

14.Termination

This Agreement is effective until terminated. It terminates automatically without notice if you fail to comply with any of its terms. You may terminate it at any time by deleting the App from your device. Sections 4, 6, 7, and 9 through 16 survive termination.

15.Governing law

This Agreement is governed by the laws of the State of Georgia, United States, without regard to its conflict-of-laws principles. You agree that the state and federal courts located in the State of Georgia have exclusive jurisdiction over any dispute arising out of or relating to this Agreement or the App, and you consent to personal jurisdiction and venue in those courts.

Nothing in this section deprives you of the protection of mandatory consumer-protection provisions of the law of the jurisdiction in which you reside, where those provisions cannot be varied by agreement.

16.Apple-specific terms

The following terms apply because the App is distributed through the Apple App Store. You acknowledge and agree that:

This Agreement is between you and the Developer only, and not with Apple Inc. ("Apple"). The Developer, not Apple, is solely responsible for the App and its content.
The license granted in section 2 is limited to use of the App on Apple-branded products that you own or control, as permitted by the Usage Rules in the Apple Media Services Terms and Conditions.
Apple has no obligation whatsoever to furnish any maintenance or support services with respect to the App.
In the event of any failure of the App to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price (if any) for the App. To the maximum extent permitted by applicable law, Apple has no other warranty obligation whatsoever with respect to the App, and any other claims, losses, liabilities, damages, costs, or expenses attributable to any failure to conform to any warranty are the Developer's sole responsibility.
The Developer, not Apple, is responsible for addressing any claims by you or any third party relating to the App or your possession and use of it, including product liability claims, any claim that the App fails to conform to any applicable legal or regulatory requirement, and claims arising under consumer protection, privacy, or similar legislation.
In the event of any third-party claim that the App or your possession and use of it infringes that third party's intellectual property rights, the Developer, not Apple, is solely responsible for the investigation, defense, settlement, and discharge of that claim.
You represent and warrant that you are not located in a country subject to a United States Government embargo or designated as a "terrorist supporting" country, and that you are not listed on any United States Government list of prohibited or restricted parties.
Apple and its subsidiaries are third-party beneficiaries of this Agreement, and upon your acceptance of it Apple will have the right (and will be deemed to have accepted the right) to enforce this Agreement against you as a third-party beneficiary.

17.General and contact

If any provision of this Agreement is held unenforceable, that provision will be limited or severed to the minimum extent necessary and the remaining provisions will remain in full force. Our failure to enforce any provision is not a waiver of it. This Agreement is the entire agreement between you and the Developer regarding the App.

We may revise this Agreement; the current version will always be posted at this address with its effective date. Continued use of the App after a revision constitutes acceptance of the revised Agreement.

Contact: y90app@gmail.com