Comparison

Formulus Free vs AP Calculus AB/BC Test Prep

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

AP Calculus AB/BC Test Prep

Prepare for your AP Calculus AB/BC exam with 500 practice questions covering all topics. Detailed explanations are provided for each question, simulating the real exam experience. Track your progress and study effectively to achieve your best score.

Highlights
  • 500 AP-style questions and answers
  • Detailed review explanations
  • Simulates real AP exam
  • Updated material
  • Study, Timed Exam, and Bookmark modes
  • Progress tracking
  • iCloud save functionality
Read full description

500 Ways to achieve your highest score From Limits and Continuity to Integration, Areas and Volumes, there is a lot of subject matter to know if you want to succeed on your AP Calculus AB/BC exam.That’s why we’ve selected these 500 AP-style questions and answers that cover all topics found on this exam. The targeted questions will prepare you for what you’ll see on test day, help you study more effectively, and use your review time wisely to achieve your best score. Each question includes a concise, easy-to-follow explanation. You can use these questions to supplement your overall AP Calculus AB/BC preparation or run them shortly before the test. Either way, 5 Steps to a 5: 500 Calculus AB/BC Questions will get you closer to achieving the score you want on test day. This valuable study guide features: •500 AP-style questions and answers •Detailed review explanations for right and wrong answers •Close simulations of the real AP exam •Updated material that reflects the latest AP exam This free application includes all questions in Chapter 1 - Limits and Continuity (1-50). The remaining 450 questions are available through a subscription. This app has been designed for the iPhone/iPad with interactive features. -Study/Timed Exam/Bookmark modes are available for review. -In the Study mode, check the answers as you tackle the questions. -In the Timed Exam mode, time yourself and review the answers after the time is up. -In the Bookmark mode, review only the questions you have flagged for further study. -File away correctly answered questions after each practice test. -Opt to include questions from previous quizzes. -Store practice test scores to track your progress. -Save your work to the iCloud to access on multiple devices. About the Author Anaxos, Inc. has been creating educational and reference materials for more than fifteen years. Based in Austin, Texas, the company uses writers from across the globe and who offer expertise on an array of subjects just as expansive. Expanded Apps Privacy Policy: https://expandedapps.com/privacy-policy/ Expanded Apps Terms of Use: https://expandedapps.com/terms-of-use/

Screenshots

Formulus Free2 screens
AP Calculus AB/BC Test Prep4 screens

Verdict

The call

The clearest difference is rating: Formulus Free at 5.0 against AP Calculus AB/BC Test Prep's 3.5. Formulus Free also leads on in-app purchases (none vs 4) and review sentiment (81% vs 50%). AP Calculus AB/BC Test Prep's advantage is ads (none vs shown). On price, ratings volume, device support and iOS requirement 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. AP Calculus AB/BC Test Prep sells 4 in-app purchases, starting at $6.99 per 7 days. Formulus Free asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Formulus Free holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 81% of Formulus Free's written reviews are positive against 50% of AP Calculus AB/BC Test Prep's.

UpkeepUpdate frequency

Formulus Free ships an update every 6 weeks, AP Calculus AB/BC Test Prep every 5 months. The most recent releases landed on October 7, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
Formulus Free versus AP Calculus AB/BC Test Prep: the parameters behind the verdict, then further details
ParameterFormulus FreeAP Calculus AB/BC Test Prep
PriceFreeFree
Rating5.0 (5 ratings) — better3.5 (4 ratings)
Positive reviews81.1% of reviews — better50.0% of reviews
Number of ratings5 — better4
Update frequencyEvery 6 weeks — betterEvery 5 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.6
Further details — not scored
Size12 MB82 MB
Age rating+44+
DeveloperDaniel ByonExpanded Apps

Customer experience

Formulus Free

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

AP Calculus AB/BC Test Prep

All ratings4 ratings
Positive50.0%
Neutral25.0%
Negative25.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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

AP Calculus AB/BC Test Prep

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Formulus Free

No in-app purchases

4 purchases

AP Calculus AB/BC Test Prep

Subscriptions3
  • 1 Week$6.997 Days
  • 1 Month$17.991 Month
  • 1 Year$69.991 Year
One-time1
  • AP Calculus AB/BC Exam Prep$15.99

Questions

Is Formulus Free free?
Formulus Free is free to download, with no in-app purchases.
Is AP Calculus AB/BC Test Prep free?
AP Calculus AB/BC Test Prep is free to download, with in-app purchases available.
Which has better reviews, Formulus Free or AP Calculus AB/BC Test Prep?
Formulus Free is rated higher. Formulus Free averages 5.0 out of 5 from 5 ratings, while AP Calculus AB/BC Test Prep averages 3.5 from 4 ratings.
Do Formulus Free or AP Calculus AB/BC Test Prep have ads?
Formulus Free shows ads; AP Calculus AB/BC Test Prep does not.
Which is updated more often, Formulus Free or AP Calculus AB/BC Test Prep?
Formulus Free ships an update every 6 weeks, and AP Calculus AB/BC Test Prep every 5 months. Most recently, Formulus Free was updated on October 7, 2026 and AP Calculus AB/BC Test Prep on September 23, 2026.

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