17Calculus - The Complete University-Level Calculus App

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, in the Precalculus section.

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 might appear intimidating, but it’s an exhaustive, complete guide to college-level calculus."
wikiHow - How to Relearn Math

"17Calculus is an excellent site for college level calculus."
MakeUseOf.com - The 20 Websites You Need to Learn Math Step by Step

"Of the ten websites it is likely that most students will find Khan Academy and 17Calculus to be the best overall sites for working through all the calculus topics step by step."
Top-Site-List.com - Top Ten Calculus Sites

17Calculus is an iOS app available now for iPhone and iPad. The app is dedicated to college calculus, science and engineering.

The Android app is currently in beta. Assuming all goes well, we plan to release it sometime in October.

This section contains lists of recommended books discussed in the app. Click the topic above to open the books list for a particular topic.

Free Textbooks - - - Recently, some free calculus textbooks have shown up online. Now, these are not the usual watered down versions. These are full textbooks that instructors are using in classrooms at reputable colleges and universities.

The best free book we've seen so far is Active Calculus by Matt Boelkins. It is over 500 pages of good material and there is a free workbook available as well. A second book we recommend is simply entitled Calculus I, II, III by Jerrold E. Marsden and Alan Weinstein. This book is actually three books and there are student guides as well. For a list of other free textbooks, check out the American Institute of Math - Approved Textbooks.

Purchased Textbooks - - - As far as purchased textbooks go, the best we've found is Larson Calculus. If you have a choice, go with Larson. If you are looking for a textbook for reference, go with an early edition of Larson. The third and fourth editions are both good.

There are a couple of things you need to know when navigating through the list of Larson Calculus textbooks.
1. There are two main types of books, Early Transcendental Functions (ETF) and non-ETF. The difference is in the structure of the material. The ETF version has the calculus of exponentials, logarithms and trig mixed in with calculus of polynomials. The non-EFT version has all the calculus of those functions separated out in later chapters. We recommend the ETF version since the flow of the material is better in our opinion and easier to learn from. However, you need to go with whatever your instructor suggests.
2. There is also the option of purchasing a copy that says just Single Variable Calculus. This is basically the first half of the full book (which contains both single and multi-variable calculus). We recommend the full version, since you never know when you might need an extra chapter or two. But, again, go with what your instructor recommends.

Here are some links to Larson textbooks, several editions. Here are the ETF editions.

Larson ETF 3th Edition
Larson ETF 4th Edition
Larson ETF 6th Edition

Here are the corresponding non-ETF editions.

Larson non-ETF 7th Edition
Larson non-ETF 8th Edition
Larson non-ETF 11th Edition

Reference Books - - - For a reference book to help you learn calculus or give you extra practice, we recommend these books. The absolute best books to supplement your calculus knowledge are How To Ace Calculus and How To Ace The Rest Of Calculus.

Books for differential equations need to be more indepth and comprehensive than for calculus or precalculus, since differential equations might be considered advanced math and is usually required for students who are actually going to use it and therefore really need to know it.

There are many books out there but these suggestions should get you started for ordinary and partial differential equations.

Elementary Differential Equations by Boyce and DiPrima has been the standard textbook at many universities for years. New versions are still being produced but it can often be difficult to read because it can be quite terse. So you need to take a lot of notes and fill in a lot of blanks. That said, it is still a good book and will give you a good grounding in first semester differential equations, if you are willing to put in the work.
These links are to more current editions of the textbook. If you don't require a specific edition, an earlier edition will work nicely.
If you are required to have it for a class, we recommend you get a supplementary text as well.


Ordinary Differential Equations (Dover Books on Mathematics) is a great supplementary text for beginning differential equations. It has great reviews on Amazon. We recommend most Dover books because they are well written and have great content, while at the same time discussing topics with depth and insight. This book will not disappoint the serious student.


We recently discovered this book and, from what we have seen, it is a good book. We looked primarily at the chapter on series solution. This book goes into more detail about the radius of convergence of power series about singular points than we have seen in most books.


These next two books discuss partial differential equations, usually taken the semester after ordinary differential equations. Dover books are some of the best supplementary math books out there, including these.

On the How To Study Math Proofs page, we give concrete techniques on how to read and understand math proofs, as well as some links for additional help. Here are some book suggestions if you are interested in learning more.

Precalculus and college algebra books are quite plentiful but not all of them are helpful. Here are the ones that we think will help you the most.

Here are some good books on how to learn many things, not just math. As you can see, there are a lot of books on this topic. The best place to start is to read the first book, Deep Work.

Deep Work: Rules for Focused Success in a Distracted World
On Course: Strategies for Creating Success in College and in Life
Moonwalking with Einstein: The Art and Science of Remembering Everything
The Practicing Mind: Developing Focus and Discipline in Your Life - Master Any Skill or Challenge by Learning to Love the Process
A Mind for Numbers: How to Excel at Math and Science (Even If You Flunked Algebra)
Becoming a Master Student
How to Become a Straight-A Student: The Unconventional Strategies Real College Students Use to Score High While Studying Less
Study Smarter, Not Harder
What Smart Students Know: Maximum Grades. Optimum Learning. Minimum Time.
Concentration: Strategies for Attaining Focus
How to Develop a Brilliant Memory Week by Week: 50 Proven Ways to Enhance Your Memory Skills
Learn to Remember : Practical Techniques and Exercises to Improve Your Memory
College Study Skills: Becoming a Strategic Learner
How to Think Like a Mathematician: A Companion to Undergraduate Mathematics
You Can Have an Amazing Memory: Learn Life-Changing Techniques and Tips from the Memory Maestro
How to Read a Book: The Classic Guide to Intelligent Reading

The Art of Electronics
Schaum's Outline of Electric Circuits
Control Systems Engineering
Electrodynamics

We search the internet for comprehensive, in-depth material on upper-level mathematics, science and engineering.   Then, we integrate the best videos, material and links into our discussion to help you learn, understand and use what you are currently studying.   Our app is not meant to replace your book or class materials but to supplement and enhance them or to refresh your skills.

Once complete, here is what you will find on more than 300 pages. (We are still in the process of integrating some of the sections into the app.)

more than 3000 videos

more than 2500 practice and exam problems all with complete, worked out, step-by-step solutions

study suggestions

ways to save on books, bags, supplies and tutoring

Excellent, highly recommended book. This book could catapult your learning, if you apply the techniques and insights carefully and radically.
Deep work is necessary as a student to succeed but few students do it. This leaves a huge chasm of possibility for you to stand out and achieve the seemingly extraordinary feat of acing calculus. This book not only explains deep work but also how to implement it in your life.
Why You Need To Work Deeply (from chapter 1)
- Deep Work Helps You Quickly Learn Hard Things
- Deep Work Helps You Produce at an Elite Level
Order this book now [ Deep Work: Rules for Focused Success in a Distracted World ] and read it during your next semester break. It will be time well spent.

Whoever is responsible for this website is absolutely brilliant. I don’t even have words to tell you how fantastic your website is and how much it has helped me. The person(s) who did this website is a perfectionist, because it is extremely thoughtful and, well, perfect. It challenges you so that you truly understand the material, it is thorough, and it leaves no questions unanswered.
Can I donate a little something? Sure, I am a poor student right now, but I feel a DUTY to give something for the immense gratitude I have for people who can put together an educational tool like this and so generously offer it for nothing. I am a much older student trying to get a master’s in statistics, so I can appreciate this website much more than the younger folks who take a lot of this type of online material for granted. I should not even compare it to other online math help sites. It truly is in a class of its own, and you should be very proud of this site.
Thank you, thank you, thank you!!!!

Just a quick thank you. I did indeed ace calc2 last semester, thanks in no small part to your website. I took the class online, and it was very much a "you’re on your own, good luck" type of affair. Your website was absolutely invaluable to me, and I recommend it to everyone I encounter who is struggling with calculus. Thanks again!

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