Comparison

PocketCAS vs FX Calculus Problem Solver

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

Head to head
About

PocketCAS

This advanced math application assists with a wide range of mathematical problems, from basic arithmetic to calculus, algebra, and statistics. It functions as a graphing calculator replacement, aids in homework, and supports complex calculations for academic and professional use.

Highlights
  • 2D and 3D plotting
  • Calculus functions (limits, derivatives)
  • Linear algebra operations
  • Equation solving
  • Scripting language
  • Physical units and constants
  • iCloud sync
Features
Read full description

PocketCAS is a graphing calculator for iPhone and iPad. It graphs your functions, finds derivatives and works with exact fractions and roots. Everything runs on your device, so it works without internet or an account. An in-app purchase unlocks PocketCAS Pro, with steps, integrals and the solver. Graphs - 2D plots of functions, implicit equations, polar and parametric curves and vector fields, two functions per plot. PocketCAS marks zeros, extrema and intersections. In full screen, tap a mark to read its coordinates. - 3D surfaces with soft light and shading. Drag to turn them, pinch to zoom. Derivatives - Under each function, a suggestion shows its derivative, already worked out, and a small plot sits beside the result. Tap one to add it to your document. - Exact derivatives of products, quotients, roots and chains, written the way your textbook writes them. Exact results - Arithmetic with exact fractions and roots, trigonometric, exponential and logarithmic functions. - Matrices: determinants, inverses and products. - Your own functions, with conditions and recursion. - Common units and physical constants. Reads like your textbook - Results look the way they do in a textbook: fractions, roots, powers and matrices. - A math keyboard with every function in reach, and a hint shows what goes between the brackets. Made for daily work - Documents keep your calculations and plots together, and iCloud syncs them between your devices. - Export and print plots, entries or whole documents (with a watermark). - Help built in: the function reference explains every function with examples, and tutorials get you started. Unlock PocketCAS Pro One purchase in the app unlocks everything in PocketCAS Pro, without a subscription: calculation steps that name the rule behind each step, integrals, limits, series and sums, equation and system solving, factoring and simplifying, eigenvalues, differential equations, scripts, plots with more than two functions, imports of documents and CSV data, larger matrices in the editor, exports without a watermark, and suggestions with zeros, extrema and integrals. Family Sharing is included, and Restore Purchases is in the main menu. Until you unlock it, the function reference marks the functions of Pro with a PRO badge. PocketCAS Pro is also sold as its own app; you need only one. Questions or ideas? Write to us at https://pocketcas.com/support. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://pocketcas.com/privacy.php

About

FX Calculus Problem Solver

Solve calculus homework and textbook problems with this comprehensive math software. It offers animated solution steps, a scientific and graphing calculator, and an intuitive editor for typing in your own problems. Ideal for students preparing for exams.

Highlights
  • Animated step-by-step solutions
  • Scientific calculator
  • Graphing calculator
  • Automatic problem solving
  • Math problem expression editor
  • Over 1,000 sample problems
Features
Read full description

Will guide you how to solve your Calculus homework and textbook problems, anytime, anywhere. FX Calculus Solver is a comprehensive math software, based on an automatic mathematical problem solving engine, and ideal for students preparing term math exams, ACT, SAT, and GRE: - Over 1,000 sample math problems and fully animated solution steps - Scientific calculator supported - Graphing calculator supported - Automatic problem solving and generation of fully animated step-by-step procedures for problems typed in by users - User friendly math problem expression editor (WYSIWYG mode) Math Solver covers problems at the level of College Algebra, Pre-Calculus and Calculus courses: - Matrix - Equations, system of equations - Inequalities - Function - Graphing - Limit - Differentiation - Integration

Screenshots

PocketCAS4 screens
FX Calculus Problem Solver4 screens

Verdict

The call

The clearest difference is rating: PocketCAS at 4.6 against FX Calculus Problem Solver's 3.4. PocketCAS also leads on review sentiment (91% vs 48%) and monetization model (free vs free with in-app purchases). FX Calculus Problem Solver's advantage is iOS requirement (11.0 vs 18.0). On price, ratings volume, update cadence and ads 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

PocketCAS holds the better App Store score, 4.6 against 3.4. Both are backed by a comparable volume of ratings — 204 and 78 respectively. Written reviews point the same way: 91% of PocketCAS's written reviews are positive against 48% of FX Calculus Problem Solver's.

UpkeepUpdate frequency

PocketCAS ships an update every 3 months, FX Calculus Problem Solver every 5 months. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 6 level
PocketCAS versus FX Calculus Problem Solver: the parameters behind the verdict, then further details
ParameterPocketCASFX Calculus Problem Solver
PriceFreeFree
Rating4.6 (204 ratings) — better3.4 (78 ratings)
Positive reviews90.8% of reviews — better48.5% of reviews
Number of ratings204 — better78
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.011.0 — better
Further details — not scored
Size42 MB35 MB
Age rating4+4+
DeveloperTiming Software GmbHEuclidus Inc

Customer experience

PocketCAS

All ratings204 ratings
Positive91.7%
Neutral4.9%
Negative3.4%
Written reviews152 reviews
Positive90.8%
Neutral1.3%
Negative7.9%

FX Calculus Problem Solver

All ratings77 ratings
Positive57.1%
Neutral11.7%
Negative31.2%
Written reviews66 reviews
Positive48.5%
Neutral10.6%
Negative40.9%

User reviews

PocketCAS

From 204 App Store ratings

What we love

  • 👍 Intuitive and user-friendly interface
  • 📊 Excellent graphing capabilities with 3D visualization
  • 💰 Free version available with substantial features
  • 🧮 Powerful mathematical computation engine
  • 📱 Convenient mobile alternative to expensive calculators

Room to improve

  • 🐛 Recent updates cause crashes on older documents
  • 💸 Expensive compared to free alternatives
  • 🔒 Limited free version functionality
  • 🎮 Clunky interface in some areas
  • ❌ Cannot plot certain advanced functions

FX Calculus Problem Solver

From 78 App Store ratings

What we love

  • 👍 Excellent for learning calculus
  • 👍 Step-by-step solutions provided
  • 👍 Helpful for reviewing concepts
  • 👍 Good for checking homework answers
  • 👍 Can simplify complex problems

Room to improve

  • 😞 Frequent crashes and freezing
  • 😞 Inaccurate answers for some problems
  • 😞 "Scam" due to payment issues
  • 😞 Premium version stops working after purchase
  • 😞 Paid content is essential

Bugs and requests

PocketCAS

Reported bugs

6 issues
  • App crashes when loading previously saved documents
  • Crashes with no error feedback or debugging information
  • Cannot plot certain mathematical functions
  • Zoom scaling issues with 3D graphs (scales Z-axis incorrectly)
  • Compatibility broken with iOS 6 after iOS 7 update
Show 1 more
  • Function plotting limitations for advanced equations

Requested features

8 requests
  • Dark theme/dark mode for UI
  • Multiple polynomials on single graph
  • Inverse button functionality
  • Better zoom functionality for 3D graphs
  • Improved documentation and tutorials
Show 3 more
  • More Greek characters support
  • Measurement conversion capabilities
  • Better control layout and cleanup

FX Calculus Problem Solver

Reported bugs

15 issues
  • App crashes when launching animated solutions board
  • App crashes after solving 2-3 operations
  • App freezes when clicking solve button
  • App crashes when hitting solve button
  • App stops working after paying for premium
Show 10 more
  • App asks for Apple ID password repeatedly after purchase
  • App gives wrong answers for simple differential problems
  • App crashes when trying more complicated integrals
  • Menus won't unexpand
  • App crashes on iPhone 6 plus
  • App freezes when creating big complex functions
  • Trig functions needed were not there
  • Keeps saying input was wrong or couldn't be calculated
  • Distributing ln across addition function incorrectly
  • Cannot graph more than half of the equations

Requested features

11 requests
  • Add summation functionality
  • Add trigonometry functions and equations
  • Add camera recognition for problems
  • Add curve fitting feature
  • Add INC and DEC coordinates on graph
Show 6 more
  • Add MiN and Maxima to graph
  • Add dy/dx button for implicit differentiation
  • Add tutorial on how to use the app
  • Improve cube root input method
  • Add dark mode option
  • Allow saving keyboard layout

In-app purchases

None

PocketCAS

No in-app purchases

None

FX Calculus Problem Solver

No in-app purchases

Questions

Is PocketCAS free?
PocketCAS is free to download, with no in-app purchases.
Is FX Calculus Problem Solver free?
FX Calculus Problem Solver is free to download, with no in-app purchases.
Which has better reviews, PocketCAS or FX Calculus Problem Solver?
PocketCAS is rated higher. PocketCAS averages 4.6 out of 5 from 204 ratings, while FX Calculus Problem Solver averages 3.4 from 78 ratings.
Do PocketCAS or FX Calculus Problem Solver have ads?
Neither PocketCAS nor FX Calculus Problem Solver shows ads.
Which is updated more often, PocketCAS or FX Calculus Problem Solver?
PocketCAS ships an update every 3 months, and FX Calculus Problem Solver every 5 months. Most recently, PocketCAS was updated on October 19, 2026 and FX Calculus Problem Solver on October 15, 2026.

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