Comparison

CrystalGen 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

CrystalGen

Features
Read full description

Visualize minerals from basic crystallographic information. Symmetry, unit cell dimension, and habit

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

CrystalGen4 screens
Derivative4 screens

Verdict

The call

The clearest difference is update cadence: Derivative at monthly against CrystalGen's every 38 months. Derivative also leads on price ($1.99 vs $2.99) and iOS requirement (15.1 vs 17.2). On ads, in-app purchases and device support 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

CrystalGen costs $2.99 and Derivative $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CrystalGen ships an update every 38 months, Derivative monthly. The most recent releases landed on November 30, 2025 and August 16, 2026 respectively.

Scorecard3 real differences ยท 3 level
CrystalGen versus Derivative: the parameters behind the verdict, then further details
ParameterCrystalGenDerivative
Price$2.99$1.99 โ€” better
Update frequencyEvery 38 monthsMonthly โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.215.1 โ€” better
Further details โ€” not scored
Size3 MB32 MB
Age rating4+4+
DeveloperSteve KliewerOm Prakash Chapagain

In-app purchases

None

CrystalGen

No in-app purchases

None

Derivative

No in-app purchases

Questions

Is CrystalGen free?
CrystalGen costs $2.99, with no in-app purchases.
Is Derivative free?
Derivative costs $1.99, with no in-app purchases.
Do CrystalGen or Derivative have ads?
Neither CrystalGen nor Derivative shows ads.
Which is updated more often, CrystalGen or Derivative?
CrystalGen ships an update every 38 months, and Derivative monthly. Most recently, CrystalGen was updated on November 30, 2025 and Derivative on August 16, 2026.

Other comparisons