Comparison

iGearbox vs ACT Math

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

Head to head
About

iGearbox

This app provides interactive tools to calculate gearbox ratios for regular and planetary gearboxes. It features a drag-and-drop design environment for gear trains and a dynamic graphic simulation for planetary gear sets, aiding in understanding and calculation.

Highlights
  • Interactive gear train design
  • Planetary gear set simulation
  • Ratio and speed calculations
  • Multiple gear train configurations
  • Dynamic component motion animations
  • Symbolic ratio equations
  • Dropbox data upload
Features
Read full description

iGearbox is an ideal educational App to interactively calculate the gearbox ratio for regular and planetary gearboxes. It offers two main tools: 1) Gear Train Tool A touch drag & drop-based design area that you can select the gears from the library, assemble, and calculate the ratio and speeds of each gear and the whole gear train. 2) Planetary Gear Set Tool An interactive and dynamic graphic based environment to learn about the planetary gear sets with different configurations and calculate ratios and the gearbox output. User selects the stationary, the input and the output parts, and observes the motion of gear set components in action. Entering the number of ring and sun teeth, the app calculates the ratio and the gearbox output for each configuration. Also, the symbolic ratio relation of the gearbox will be shown for each configuration. ******** Features ********* Gear Train Tool: - Touch/ drag & drop-based design environment - Multiple gear train configuration (up to 8 gears in train) - Ratio and speed calculations for each gear and the whole gear train Planetary Tool: - 6 different configurations. i.e., each component (ring, sun, planets arm) can be selected as stationary, input, or output components - Dynamic interactive motion of the components for each configuration (Animations) - Symbolic ratio equation for each configuration - Ratio calculation for each case based on the sun and ring # of teeth - Output calculations based on the gear configuration and specification - Planetary gear set formulations as a help document - Adjustable rotating speed for the animations of the gearset - Dropbox upload of screenshot and data ******************************* iGearbox is a perfect tool for instructors to teach and show the basics and fundamental concepts of regular and planetary gearboxes. Connecting the device to the monitor or projector, instructors can present the animations of the gearbox for different configurations. ******************************* iGearbox is a universal App that works on iPad, iPhone, and iPod Touch. You will be able to install the App on all these devices when you buy one copy. Disclaimer: iGearbox is developed to be used for educational purposes. Although the calculations done by this App were made with great care, it may contain errors or inaccuracies. Using the results of the calculations is the sole responsibility of the user.

About

ACT Math

This app provides comprehensive practice for the ACT Algebra section with numerous questions and detailed explanations. It includes mock tests, instant feedback, and progress tracking to help users prepare effectively for the exam.

Highlights
  • 490 ACT Algebra practice questions
  • 49 revision notes
  • Mock tests with mixed questions
  • Instant feedback on answers
  • Detailed explanations for each question
  • Progress tracking with charts
  • Revision by topic
Features
Read full description

490 questions and 49 revision notes covering all ACT Algebra syllabus. This is a high quality content written by an experienced Mathematician. Other features include: ** MOCK TEST Mixed questions from all topics. ** INSTANT FEEDBACK Know instantly if your answer was right or wrong. ** REVIEW WITH EXPLANATION Review each question at the end of the test. Know the right answer with detailed explanation for each question. ** PROGRESS METER With our unique progress tracking feature including pie charts and bar graphs showing your progress, you know you are ready to take on the real test at the board when your progress meter says 100%. ** REVISE BY TOPIC 1. Exponents Exponents of 10 Scientific Notation Square Roots Squares Evaluating Exponents Dividing Exponents Multiplying Exponents Exponent of a Exponent Advanced Exponents 1 Advanced Exponents 2 2. Algebric Expressions Addition and Subtraction of Algebraic Expressions Multiplication of Algebraic Expressions Algebraic Fractions Expanding Simplifying and Factoring Binomial Expansion Evaluating Expressions 1 Evaluating Expressions 2 Manipulation and Evaluation of Expressions Translation into Algebraic Expressions Substitution Problems Difference of Two Squares Factoring Quadratics with Unit Coefficient 3. Equations & Inequalities Linear Equations 1 Linear Equations 2 Linear Equations 3 Inequalities Inequalities on Number Lines Solving Inequalities Solving for One Variable in Terms of Another Setting up Equations Solving Equations with Radical Expressions Working with 'unsolvable' equations Equations Involving Absolute Values 4. Functions Functions as Models Compound Functions and Translations Logarithms 5. Advance Equations & Inequalities Systems of Equations (Linear) Setting up Systems of Equations Solving Quadratics by Factoring Using the Quadratic Formula Rational Equations and Inequalities Quadratic Inequalities 6. Miscellaneous Introduction to Sequences Arithmetic Sequences Geometric Sequences Surds Complex Numbers Matrices Disclaimer: ACT is a registered trademark of ACT Inc. ACT Inc neither sponsors nor endorses this product or any of its content. There may be a possibility of some bugs, inaccuracies or typographical errors for which the owner cannot be held liable. * Privacy Policy: http://www.webrichsoftware.com/privacy.html * EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

iGearbox4 screens
ACT Math4 screens

Verdict

The call

The clearest difference is review sentiment: ACT Math at 100% against iGearbox's 17%. ACT Math also leads on price (Free vs $4.99) and rating (4.7 vs 3.0). iGearbox's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On ads 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

ACT Math is free to download; iGearbox costs $4.99 up front. ACT Math sells 1 one-off in-app purchase. iGearbox asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ACT Math holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 6 and 19 respectively. Written reviews point the same way: 17% of iGearbox's written reviews are positive against 100% of ACT Math's.

UpkeepUpdate frequency

iGearbox ships an update every 55 months, ACT Math every 11 months. Both last shipped on November 1, 2026.

Scorecard8 real differences · 2 level
iGearbox versus ACT Math: the parameters behind the verdict, then further details
ParameteriGearboxACT Math
Price$4.99Free — better
Rating3.0 (6 ratings)4.7 (19 ratings) — better
Positive reviews16.7% of reviews100.0% of reviews — better
Number of ratings619 — better
Update frequencyEvery 55 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size12 MB17 MB
Age rating+4+4
DeveloperMotionics LLCWebrich Software Limited

Customer experience

iGearbox

All ratings6 ratings
Positive33.3%
Neutral33.3%
Negative33.3%
Written reviews6 reviews
Positive16.7%
Neutral33.3%
Negative50.0%

ACT Math

All ratings18 ratings
Positive94.4%
Neutral0.0%
Negative5.6%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

iGearbox

No in-app purchases

1 purchases

ACT Math

One-time1
  • Full Question Bank$1.99

Questions

Is iGearbox free?
iGearbox costs $4.99, with no in-app purchases.
Is ACT Math free?
ACT Math is free to download, with in-app purchases available.
Which has better reviews, iGearbox or ACT Math?
ACT Math is rated higher. iGearbox averages 3.0 out of 5 from 6 ratings, while ACT Math averages 4.7 from 19 ratings.
Do iGearbox or ACT Math have ads?
Neither iGearbox nor ACT Math shows ads.
Which is updated more often, iGearbox or ACT Math?
iGearbox ships an update every 55 months, and ACT Math every 11 months. Most recently, iGearbox was updated on November 1, 2026 and ACT Math on November 1, 2026.

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