17Calculus and 17Precalculus - The Complete University-Level Calculus and Precalculus Apps

You CAN Ace Calculus

1. Download the free app from the App Store on your iPhone and iPad.

2. Refresh your precalculus knowledge, if needed, using the 17Precalculus app.

3. Start learning calculus: first topic is Limits.

4. Check out the tools menu for more options including study suggestions and motivation to learn calculus.

5. As you continue on in your calculus course, pay for only the sections you need. The small fee for each section allows us to continue to offer and improve 17Calculus.

17Calculus and 17Precalculus Privacy Policy

Privacy Policy

This policy applies to all information collected or submitted on 17Calculus or 17Precalculus websites and our apps for iPhone and any other devices and platforms.

Information We Collect

We do not collect or store any user information. We do not require an account to use our websites or apps.

Ads and Analytics

17Calculus and 17Precalculus apps do not collect or store any user data. We use tracking links to track access of pages and practice problems on our websites. These analytics store information, which we use only to track general usage so that we can improve our websites and apps. We do not pass on any information whatsoever to other organizations or individuals in any form.
No personal data is used to target 17Calculus or 17Precalculus ads.

Information Usage

We use the information we collect to operate and improve our website, apps, and customer support.
We may disclose your information in response to subpoenas, court orders, or other legal requirements; to exercise our legal rights or defend against legal claims; to investigate, prevent, or take action regarding illegal activities, suspected fraud or abuse, violations of our policies; or to protect our rights and property.
In the future, we may sell to, buy, merge with, or partner with other businesses. In such transactions, user information may be among the transferred assets.


We implement a variety of security measures to help keep your information secure. For instance, all communication with the app and website requires HTTPS with certificate pinning.

Third-party Links and Content

17Calculus and 17Precalculus displays links and content from third-party sites. These have their own independent privacy policies, and we have no responsibility or liability for their content or activities.

California Online Privacy Protection Act Compliance

We comply with the California Online Privacy Protection Act. We therefore will not distribute your personal information to outside parties without your consent.

Children’s Online Privacy Protection Act Compliance

We never collect or maintain information at our website from those we actually know are under 13, and no part of our website is structured to attract anyone under 13.

Information for European Union Customers

By using 17Calculus and 17Precalculus, you authorize us to collect, use, and store your information outside of the European Union.

International Transfers of Information

Information may be processed, stored, and used outside of the country in which you are located. Data privacy laws vary across jurisdictions, and different laws may be applicable to your data depending on where it is processed, stored, or used.

Your Consent

By using our sites or apps, you consent to our privacy policy.

Contacting Us

If you have questions regarding this privacy policy, you may email support at 17calculus.com.

Changes to This Policy

If we decide to change our privacy policy, we will post those changes on this page.
October 24, 2019: First published.

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When using the material on this site and in the app, check with your instructor to see what they require. Their requirements come first, so make sure your notation and work follow their specifications.

DISCLAIMER - 17Calculus owners and contributors are not responsible for how the material, videos, practice problems, exams, links or anything on this site or in the app are used or how they affect the grades or projects of any individual or organization. We have worked, to the best of our ability, to ensure accurate and correct information on each page and solutions to practice problems and exams. However, we do not guarantee 100% accuracy. It is each individual's responsibility to verify correctness and to determine what different instructors and organizations expect. How each person chooses to use the material on this site or in the app is up to that person as well as the responsibility for how it impacts grades, projects and understanding of calculus, math or any other subject. In short, use this site and app wisely by questioning and verifying everything. If you see something that is incorrect, contact us right away so that we can correct it.

Links and banners on this page are affiliate links. We carefully choose only the affiliates that we think will help you learn. Clicking on them and making purchases help you support 17Calculus at no extra charge to you. However, only you can decide what will actually help you learn. So think carefully about what you need and purchase only what you think will help you.


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