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Thanks for using my app! I may be biased, but this is probably the best pregnancy calculator available.

Use the "hamburger" menu in the upper right corner to navigate the site. Make sure check out the Help page and the How-To Video if you haven't used this before.
Recent updates are listed in the Changelog.

Terms of Use and Privacy Policy ("us", "we", or "our") operates OBWheel at (the "Site", "Service", or "webapp").

This page informs you of our policies regarding the collection, use, and disclosure of Personal Information we receive from users of the Site.

We use your Personal Information only for providing and improving the Site. By using the Site, you agree to the collection and use of information in accordance with this policy.

Information Collection And Use

The use of this Site does not require you to provide any personally identifiable information. ("Personal Information") We do not collect or use any Personal Information.

Log Data

This Site uses Google Analytics which collects, monitors, and analyzes information that your browser sends whenever you visit the website or use the webapp ("Log Data"). This Log Data may include information such as your computer's Internet Protocol ("IP") address, browser type, browser version, the pages of our Site that you visit, the time and date of your visit, the time spent on those pages and other statistics. This information is used to improve the quality of the app in various ways.


Cookies are files with small amount of data, which may include an anonymous unique identifier. Cookies are sent to your browser from a web site and stored on your computer's hard drive.

Like many sites, we use "cookies" to collect information. You can instruct your browser to refuse all cookies or to indicate when a cookie is being sent. However, if you do not accept cookies, you may not be able to use some portions of our Site. Learn more at

General disclaimer

The information contained on the Site is for general information purposes only. assumes no responsibility for errors or omissions in the contents on the Service.

In no event shall be liable for any special, direct, indirect, consequential, or incidental damages or any damages whatsoever, whether in an action of contract, negligence or other tort, arising out of or in connection with the use of the Service or the contents of the Service. reserves the right to make additions, deletions, or modification to the contents on the Service at any time without prior notice. does not warrant that the website is free of viruses or other harmful components.

External links

The OB Wheel website may contain links to external websites that are not provided or maintained by or in any way affiliated with Please note that the we do not guarantee the accuracy, relevance, timeliness, or completeness of any information on these external websites.

Medical/health information

This website offers medical and health information and is designed for educational purposes only. You should not rely on this information as a substitute for, nor does it replace, professional medical advice, diagnosis, or treatment.

Changes To This Policy

This Policy is effective as of 2019-09-08 and will remain in effect except with respect to any changes in its provisions in the future, which will be in effect immediately after being posted on this page.

We reserve the right to update or change our Privacy Policy at any time and you should check this Privacy Policy periodically. Your continued use of the Service after we post any modifications to the Privacy Policy on this page will constitute your acknowledgment of the modifications and your consent to abide and be bound by the modified Privacy Policy.

Opt Out

You may opt out of traffic analytics by clicking the button below. You may also disable cookies in your browser, however please be aware that this may result in a suboptimal user experience, and some parts of the site may not work as expected. Opting out of analytics by clicking below does not disable or delete cookies.

Last updated: 2019-09-13

It looks like you have the PRO key installed. Thank you for your support! I plan to implement some premium features eventually, so stay tuned!