Comparison

RationalNumberCalculator vs Taculator 84 Graphing Calc

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

Head to head
About

RationalNumberCalculator

Perform calculations with fractions, decimals, and mixed numbers. Supports addition, subtraction, multiplication, and division. Results can be displayed in various formats.

Highlights
  • Fraction arithmetic
  • Decimal and fraction operations
  • Four arithmetic operations
  • Display results as decimal
  • Display results as improper fraction
  • Display results as mixed fraction
Features
Read full description

It is a calculator for a fraction calculation. We will do the four arithmetic operations of fraction and fraction, decimal and fraction. The results can be displayed decimal, improper fraction, mixed fraction.

About

Taculator 84 Graphing Calc

This advanced calculator app offers comprehensive tools for high school and college students, covering everything from pre-algebra to calculus and statistics. It features high-resolution graphing, matrix operations, and detailed statistical analysis, all accessible through an intuitive interface.

Highlights
  • Scientific and advanced math functions
  • High-resolution graphing and plotting
  • Matrix operations and storage
  • List, statistics, and distribution calculations
  • Integrated command catalog and help
  • Complex number support
  • Share calculations via text or email
Features
Read full description

TACULATOR 84 GRAPHING CALCULATOR • Your graphing calculator for high school and college students. • All the commands you know: advanced math, lists, statistics, distributions, stat plots and more. • Covers everything you need: Pre-Algebra, Algebra 1 & 2, Pre-Calculus, Calculus, Statistics... IT'S EVEN BETTER THAN AN ACTUAL CALCULATOR • 100X faster than a handheld, using the full calculation power of your iPhone/iPad. • High-resolution graphing window for sharp and beautiful graphs. • Icon home screen, redesigned menus, optional status line. • Share calculations by text or email. ◉ Math Functions • Scientific calculator with every basic and advanced function. • Scrollable history; copy any previous calculation. • Complex numbers support • Probability: nPr, nCr, factorial, random numbers. • Enter fractions easily; tap any result to flip fraction and decimal. • Piecewise functions, sequences, list commands like seq(, ΔList(, augment(. • Degree, radian and gradian angle modes, DMS format. • Error messages point at the exact spot in your input. ◉ Graphing Functions • Four graphing modes: Function, Parametric, Polar and Sequence (u, v, w with TIME and WEB plots); trace, tables, CALC and zoom work in every mode. • Smart trace snaps to zeros, maxima, minima, intersections and asymptotes. • Calculate intersection, zero, minimum, maximum, integral, and derivative. • Full ZOOM menu: ZBox, ZSquare, ZTrig, ZoomFit, zoom factors and zoom memory. • Draw on your graph: text, pen, points, tangents, circles and shading in color. • Store and recall pictures, or put a photo behind your graph. • Graph statistical plots like histogram, box plot, scatter plot, xy-line plot. • Full-screen mode, pinch to zoom, full window and format settings. ◉ List, Statistics, and Distribution • Stat list editor with 1- and 2-Variable statistics. • Guided input wizards for every test, interval and distribution. • List math: min, max, mean, median, sum, product, standard deviation, variance. • Find best-fit regressions: LinReg (ax+b), LinReg (a+bx), QuadReg, CubicReg, QuartReg, LnReg, ExpReg, PwrReg, Logistic, SinReg, PropReg, RecipReg, eBASEReg — with r and r² diagnostics. • Manual-Fit a line by eye, or QuickPlot points and fit a model right on the graph. • Statistical tests: Z-Test, T-Test, 2-Sample Z- and T-Tests, 1- and 2-PropZTest, plus Z-, T- and proportion intervals. • Distributions: Normal, T, χ2, F, Poisson, Binomial, Geometric (each pdf and cdf), invT — and shade them right on the graph. ◉ Command Catalog & Syntax Help • Integrated Catalog & Help: syntax, examples and error messages for every command. • Type a command and see the right syntax next to the cursor. ◉ Built-in Apps • Geometry: points, lines, circles and polygons — measure, transform, animate. • Polynomial Root Finder & Simultaneous Equation Solver. • Finance: Time-Value-of-Money solver, NPV, IRR, amortization. • Probability Simulation: toss coins, roll dice, spin spinners, draw cards. • Science Tools: sig-fig calculator, unit converter, data/graphs wizard, vector calculator. • Conics & Lines: equation templates for lines (even X=C), circles, parabolas, ellipses and hyperbolas, with SOLVE for center, foci, vertices, directrix. • Transformation Graphing, Inequality Graphing, Periodic Table. • Numeric Solver: solve any equation for any variable. ◉ Matrix Calculator • Store matrices and reuse them as [A], [B], [C], ... • Matrix arithmetic: addition, multiplication, scalar products, powers. • Transpose, determinant, inverse, dimension, ref/rref, identity matrix, cumulative sum. SUPPORT Contact us at contact@taculator.com --- Taculator Pro Membership • Unlock advanced calculations and functions with a monthly, yearly, or lifetime subscription. • Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. • Manage subscriptions in Account Settings. Terms of Service: https://taculator.com/terms/ Privacy Policy: https://taculator.com/privacy/

Screenshots

RationalNumberCalculator3 screens
Taculator 84 Graphing Calc4 screens

Verdict

The call

The clearest difference is rating: RationalNumberCalculator at 5.0 against Taculator 84 Graphing Calc's 4.5. RationalNumberCalculator also leads on in-app purchases (none vs 12) and review sentiment (64% vs 45%). Taculator 84 Graphing Calc's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 9 months). On price 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

Both are free to download. Taculator 84 Graphing Calc sells 7 in-app purchases, starting at $3.99 per month. RationalNumberCalculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RationalNumberCalculator holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Taculator 84 Graphing Calc has 7.6K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 64% of RationalNumberCalculator's written reviews are positive against 45% of Taculator 84 Graphing Calc's.

UpkeepUpdate frequency

RationalNumberCalculator ships an update every 9 months, Taculator 84 Graphing Calc every 3 weeks. The most recent releases landed on June 26, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 2 level
RationalNumberCalculator versus Taculator 84 Graphing Calc: the parameters behind the verdict, then further details
ParameterRationalNumberCalculatorTaculator 84 Graphing Calc
PriceFreeFree
Rating5.0 (6 ratings) — better4.5 (7.6K ratings)
Positive reviews63.6% of reviews — better45.2% of reviews
Number of ratings67.6K — better
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better13.0
Further details — not scored
Size4 MB55 MB
Age rating4+4+
DeveloperJirou FukudaDi Venisco UG (haftungsbeschrankt)

Customer experience

RationalNumberCalculator

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews44 reviews
Positive63.6%
Neutral15.9%
Negative20.5%

Taculator 84 Graphing Calc

All ratings7,567 ratings
Positive87.8%
Neutral3.7%
Negative8.5%
Written reviews177 reviews
Positive45.2%
Neutral13.6%
Negative41.2%

Bugs and requests

RationalNumberCalculator

Not enough reviews yet to summarise bugs or requests.

Taculator 84 Graphing Calc

Reported bugs

4 issues
  • Cannot handle negative powers
  • Keyboard issues on certain devices
  • Errors when trying to clear lists
  • Scaling and UI issues on some devices

Requested features

4 requests
  • Add apps and programming features
  • Improve graphing capabilities
  • Add support for degrees, minutes, and seconds
  • Implement symbolic calculus and equation solving

In-app purchases

None

RationalNumberCalculator

No in-app purchases

7 purchases

Taculator 84 Graphing Calc

Subscriptions6
  • Taculator Pro - Monthly7 Days trial4 variants$3.991 Month
  • Taculator Pro - Monthly2 variants$3.991 Month
  • Taculator Pro - Yearly7 Days trial2 variants$14.991 Year
Show 3 more
  • Taculator Pro - Yearly$14.991 Year
  • Taculator Pro - Yearly7 Days trial$29.991 Year
  • Taculator Pro7 Days trial$29.991 Year
One-time1
  • Taculator Pro - Lifetime$5.99

Questions

Is RationalNumberCalculator free?
RationalNumberCalculator is free to download, with no in-app purchases.
Is Taculator 84 Graphing Calc free?
Taculator 84 Graphing Calc is free to download, with in-app purchases available.
Which has better reviews, RationalNumberCalculator or Taculator 84 Graphing Calc?
RationalNumberCalculator is rated higher. RationalNumberCalculator averages 5.0 out of 5 from 6 ratings, while Taculator 84 Graphing Calc averages 4.5 from 7.6K ratings.
Do RationalNumberCalculator or Taculator 84 Graphing Calc have ads?
RationalNumberCalculator shows ads; Taculator 84 Graphing Calc does not.
Which is updated more often, RationalNumberCalculator or Taculator 84 Graphing Calc?
RationalNumberCalculator ships an update every 9 months, and Taculator 84 Graphing Calc every 3 weeks. Most recently, RationalNumberCalculator was updated on June 26, 2026 and Taculator 84 Graphing Calc on September 24, 2026.

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