Comparison

Pre vs Derivative

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

Head to head
About

Pre

Features
Read full description

Auto-renewable subscription Pre-Algebra Fundamentals comes with a 7-day free trial. After this you will be charged $4.99 a month and you can cancel anytime. Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage your subscription by visiting your iTunes Account Settings. Privacy policy: https://www.mathgalaxy.com/FQ3_Menu/FQ3_PreAlgebra_Privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Math Galaxy Pre-Algebra Fundamentals is like having an interactive textbook, with explanations, practice, games, and videos that cover all topics found in middle school math: decimals negative numbers (integers) absolute value exponents roots scientific and metric notation and operations order of operations factors and prime numbers 1 & 2-step equations systems of equations slopes and linear equations ratios & proportions similar figures direct & inverse variation percents geometry, including length, area, volume, weight, lines, angles & polygons pythagoras & right triangles basic trigonometry graphs frequency tables, mean (average) & median stem-and-leaf plots box-and-whisker plots probability patterns and sequences The concepts are presented in bite-size pieces and there is an unlimited number of practice problems, with numbers chosen randomly. By solving problems students earn robots to use in a maze game called the Labyrinth.

About

Derivative

Features
Read full description

The DerivativeCalculus is a simple but elegant app to find the derivatives of complex multivariable functions. You can find the partial derivatives of a multivariate function and share it with others or save it locally. You can create a beautiful high quality partial derivative tree and share it with others or save it locally. Derivatives are shown in beautifully written mathematical expression It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. This app also has a Study page to help you learn important differentiation rules like, product rule, chain rule, quotient rule, ect. This app is perfect for students learning calculus. Sharpen you brain by using this app and learning about the calculus. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!

Screenshots

Pre4 screens
Derivative4 screens

Verdict

The call

The clearest difference is price: Pre at Free against Derivative's $1.99. Derivative's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 31 months). On ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Pre is free to download; Derivative costs $1.99 up front. Pre sells 1 in-app purchase, starting at $4.99 per month. Derivative asks for nothing beyond the download.

UpkeepUpdate frequency

Pre ships an update every 31 months, Derivative monthly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

Scorecard3 real differences ยท 3 level
Pre versus Derivative: the parameters behind the verdict, then further details
ParameterPreDerivative
PriceFree โ€” better$1.99
Update frequencyEvery 31 monthsMonthly โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 โ€” better15.1
Further details โ€” not scored
Size296 MB32 MB
Age rating4+4+
DeveloperMath GalaxyOm Prakash Chapagain

In-app purchases

1 purchases

Pre

Subscriptions1
  • PreAlgebra - Math Galaxy7 Days trial$4.991 Month
None

Derivative

No in-app purchases

Questions

Is Pre free?
Pre is free to download, with in-app purchases available.
Is Derivative free?
Derivative costs $1.99, with no in-app purchases.
Do Pre or Derivative have ads?
Neither Pre nor Derivative shows ads.
Which is updated more often, Pre or Derivative?
Pre ships an update every 31 months, and Derivative monthly. Most recently, Pre was updated on October 24, 2026 and Derivative on October 11, 2026.

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