Comparison

Formulus Free vs iformula

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Formulus Free

Access a comprehensive collection of essential math formulas for high school and college calculus students. Quickly find the formulas you need without flipping through textbooks or searching online.

Highlights
  • Calculus formula collection
  • Algebra and Geometry formulas
  • Derivatives
  • Integrals
  • Limits
  • Trigonometry
  • Vectors
Features
Read full description

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

About

iformula

This app is a comprehensive math learning platform for students and professionals. It offers a vast library of over 1000 math equations and topics, along with features like search, note-taking, and bookmarking. It aims to eliminate the need for physical math textbooks.

Highlights
  • 1000+ math equations and topics
  • Full-featured search functionality
  • Note-taking system
  • Bookmarking for favorite equations
  • Dual language support (English & German)
  • Dark mode support
Features
Read full description

iformula (free version) is much more than a simple math equation library app like other apps, it is a math productive learning platform and has become a standard for higher math education at schools and universities ! iformula was specially developed for academic students, engineers, high school students, math course students and for math home schooling and distance learning, as well as a refresher for scientist with higher mathematics skills and all people, who are interested in math. Failing an exam or can't go on with your calculations, because not knowing an equation, belong to the past ! iformula (free version) app includes the following functions: ► Math equation topics, more than 1000 of math equations included: * Areas, Planes * Binomials * Complex Numbers * Constants * Derive * Differential Equation * Fractions * Geometric Constructions * Graphic Functions * Greek Alphabet * Logarithm * Much more math topics & functions are available in formula pro app version - ► App functions: * Full featured equation and math topics search functionality (search for thousands of math topics) * Notes system for important equation notes * Bookmarking system for your favorite equations ! * Full app dual language support: English & German * Search for all topics and categories * Dark mode support ! All math formulas and functions are included in the app no need to download anything ! There is no need of carrying around heavy paper mathematics library books anymore - iformula is your right choice ! This app does not include any annoying advertisement !! That powerful validation, and our reputation for safety, durability, reliability, and ease of use, has also driven our consumer dedication further than ever anticipated. Moving forward, our commitment to "Perfection" remains steadfast: We will never compromise quality. We will continue to invest tremendous resources in the technology and talent necessary to improve our products wherever possible; and we will always strive to deliver maximum customer satisfaction! Exclusion of liability ! Exclusion of warranty and guarantee !

Screenshots

Formulus Free2 screens
iformula4 screens

Verdict

The call

The clearest difference is rating: Formulus Free at 5.0 against iformula's 4.0. Formulus Free also leads on review sentiment (81% vs 65%) and ratings volume (5 vs 1). iformula's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Formulus Free holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Formulus Free has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 81% of Formulus Free's written reviews are positive against 65% of iformula's.

UpkeepUpdate frequency

Formulus Free ships an update every 6 weeks, iformula every 2 months. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
Formulus Free versus iformula: the parameters behind the verdict, then further details
ParameterFormulus Freeiformula
PriceFreeFree
Rating5.0 (5 ratings) — better4.0 (1 ratings)
Positive reviews81.1% of reviews — better65.0% of reviews
Number of ratings5 — better1
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better17.6
Further details — not scored
Size12 MB59 MB
Age rating+44+
DeveloperDaniel ByonTobias Werner

Customer experience

Formulus Free

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews169 reviews
Positive81.1%
Neutral7.1%
Negative11.8%

iformula

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews20 reviews
Positive65.0%
Neutral5.0%
Negative30.0%

Bugs and requests

Formulus Free

Reported bugs

13 issues
  • App crashes on startup after updates
  • Freezing and lag issues during use
  • Compatibility issues with larger iPhone screens
  • Incorrect cross product entry formula
  • Error in Simpson's rule integral approximation
Show 8 more
  • Typo in power series expansion for cos(x)
  • Incorrect absolute value notation in some formulas
  • Change-of-base formula error
  • Inconsistent header display (wrong category shown)
  • Some formula entries are empty or incomplete
  • Blurry image quality for some formulas
  • Taylor series functionality not working
  • App stops opening after certain updates

Requested features

15 requests
  • Add practice problems and worked examples
  • Include inverse trigonometric functions
  • Add 3D shapes and geometry formulas
  • Implement search functionality for quick formula finding
  • Add graphing and calculation capabilities
Show 10 more
  • Include zoom feature for better readability
  • Add definitions and learning explanations
  • Separate Algebra and Geometry into distinct categories
  • Allow users to add personal notes and corrections
  • Support for multiple languages
  • Remember app location when reopening
  • Expand power series expansions section
  • Include tabular integration by parts method
  • Add radius of convergence information
  • Include Euler's formula in complex numbers section

iformula

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Formulus Free

No in-app purchases

None

iformula

No in-app purchases

Questions

Is Formulus Free free?
Formulus Free is free to download, with no in-app purchases.
Is iformula free?
iformula is free to download, with no in-app purchases.
Which has better reviews, Formulus Free or iformula?
Formulus Free is rated higher. Formulus Free averages 5.0 out of 5 from 5 ratings, while iformula averages 4.0 from 1 ratings.
Do Formulus Free or iformula have ads?
Formulus Free shows ads; iformula does not.
Which is updated more often, Formulus Free or iformula?
Formulus Free ships an update every 6 weeks, and iformula every 2 months. Most recently, Formulus Free was updated on October 7, 2026 and iformula on October 13, 2026.

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