Formulus Free 4+

Formulas for Calculus

Daniel Byon

Designed for iPad

    • 5.0 • 5 Ratings
    • Free



Have you ever needed to know that one math formula that you always forget? Do you spend minutes flipping through your textbook or searching the internet for it? Then you need Formulus!

Formulus is the perfect study tool. It is a simple, easy to use, easy to navigate collection of the most important formulas and topics for high school and college students taking Calculus.

Includes the following subject areas:
- Algebra & Geometry
- Derivatives
- Functions
- Integrals
- Limits
- Logarithms
- Matrices
- Partial Derivatives
- Series & Sequences
- Trigonometry
- Vectors

What’s New

Version 4.0.1

Formulus has undergone a complete rewrite. Performance should be much faster, and better adapt to your device.

Ratings and Reviews

5.0 out of 5
5 Ratings

5 Ratings

MEArch ,

Excellent app for learning or refreshing math skills.

Excellent app!

Prlygrly ,

Extremely convenient

This app an incredibly convenient one to own, especially if you're like me and are constantly going to google or wolfram alpha to find the mathematical formula for something you should have memorized. I highly recommend it.

Barry Kitch ,

Good calculus resource, could be better

I tutor calculus students for a living and this app is perfect for me - I know the material, I just can't remember all the formulas.

There is no interactivity. It's just a big PDF with a bunch of formulas and an occasional line of explanation. Beginners may frustrated in part because the organization is not great, but since it's free, you might as well have it.

The good news: there is a ton of stuff here, and it is all accurate as far as I can tell (exception: I can confirm an error in Simpson's rule that another reviewer pointed out). There is a sizable section on differential equations (including Laplace transforms), but not much on multivariable calculus.

Problem: there is a glitch with the headers. For example, when I was looking at derivatives, the header said "Algebra & Geometry."

The main complaint I have is that certain things have been overlooked. The derivative of an inverse function is missing. The section on complex numbers does not include Euler's formula. There's no mention of radius of convergence.

The list of power series expansions is too short - surely it should have cos(x), ln(x+1) and the binomial series. In the integration by parts section, why not include the tabular method? By and large, the list of integrals was shorter than I expected, but it does cover the basics.

It would be nice if this had a feature that allowed users to add their own notes (and corrections!).

But it's free, so you can't complain.

App Privacy

The developer, Daniel Byon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

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The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers
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The following data may be collected and linked to your identity:

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Privacy practices may vary, for example, based on the features you use or your age. Learn More

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