Comparison

x36 vs SFX Scientific Calc Premium

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

Head to head
About

x36

This app offers a powerful scientific and engineering calculator with advanced features like programmability, multiple number bases, and statistical functions. It emulates the functionality of calculators from the 70s and 80s, providing over 100 functions for complex calculations.

Highlights
  • Programmability with 1000 steps
  • Trigonometric functions with selectable units
  • Statistical functions and linear regression
  • Four number bases (Decimal, Hex, Octal, Binary)
  • Metric-English conversions
  • Fraction operations
  • Over 100 functions
Features
Read full description

This calculator is packed with features common to any good scientific and engineering calculator from the 70's and 80's including: Programability. Can store up to 1000 steps. Includes label, jump, loop and subroutine capability. -Common mathematical operations including square roots, powers, reciprocals, and logarithmic functions. -Up to 15 levels of parenthesis. -A full set of trigonometric functions working with user selectable units of degrees, radians, and gradians. Also performs polar-rectangular and degrees-minutes-seconds - decimal degree conversions. -Common physical constants such as the speed of light, gravitational constant and Avogadro's number. -Single and double variable statistical functions including linear regression. 10 memory storage locations. -Metric-English and English metric conversions. -Four number bases (Decimal, Hexadecimal, Octal, and Binary). -Bit logic operations. -Three display modes (floating point, scientific, and engineering) with user adjustable number of digits displayed. -Can perform operations with fractions! Over 100 functions in all! AND NO ADS!

About

SFX Scientific Calc Premium

This scientific calculator offers advanced functions for academic, scientific, and engineering needs. It supports basic arithmetic, memory storage, statistical calculations, and various mathematical functions. The interface mimics a popular Casio model for ease of use.

Highlights
  • Basic arithmetic operations
  • Constant and volatile memory storage
  • Fraction and percentage calculations
  • Linear regression and statistics
  • Number base conversions (Binary, Octal, Decimal, Hexadecimal)
  • Trigonometric, hyperbolic, and logarithmic functions
  • Formula calculations
Features
Read full description

SFX Calc Premium gives students and engineers a familiar handheld-style scientific calculator on iPhone, iPad, and Mac. From quick arithmetic to statistics and engineering formulas, it keeps advanced calculations in a practical, customizable layout. FEATURES • Scientific functions: trigonometric, hyperbolic, logarithmic, exponential, power, and root • Engineering notation with SI prefixes • Fraction and percentage calculations • Linear regression and statistical calculations • Binary, octal, decimal, and hexadecimal modes • Fixed-constant calculations for repeated operations • One persistent memory plus 10 temporary memory registers • Built-in formulas, including the quadratic formula, standard normal distribution probabilities, and engineering calculations • Configurable 10- or 13-digit display and exponent formats • Copy and paste support for faster workflows • A familiar keypad with customizable layout options • Ads free and no pop-up review Ideal for coursework, laboratories, electronics, mathematics, science, and everyday engineering work.

Screenshots

x364 screens
SFX Scientific Calc Premium4 screens

Verdict

The call

The clearest difference is rating: x36 at 5.0 against SFX Scientific Calc Premium's 4.3. x36 also leads on price ($0.99 vs $5.99) and review sentiment (100% vs 80%). SFX Scientific Calc Premium's advantage is update cadence (monthly vs every 2 months). On ratings volume, ads, in-app purchases and monetization model 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

x36 costs $0.99 and SFX Scientific Calc Premium $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

x36 holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 100% of x36's written reviews are positive against 80% of SFX Scientific Calc Premium's.

UpkeepUpdate frequency

x36 ships an update every 2 months, SFX Scientific Calc Premium monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
x36 versus SFX Scientific Calc Premium: the parameters behind the verdict, then further details
Parameterx36SFX Scientific Calc Premium
Price$0.99 — better$5.99
Rating5.0 (2 ratings) — better4.3 (3 ratings)
Positive reviews100.0% of reviews — better80.0% of reviews
Number of ratings23 — better
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better14.0
Further details — not scored
Size1 MB16 MB
Age rating4+4+
DeveloperCarl CookWai Kwong Lee

Customer experience

x36

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SFX Scientific Calc Premium

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

None

x36

No in-app purchases

None

SFX Scientific Calc Premium

No in-app purchases

Questions

Is x36 free?
x36 costs $0.99, with no in-app purchases.
Is SFX Scientific Calc Premium free?
SFX Scientific Calc Premium costs $5.99, with no in-app purchases.
Which has better reviews, x36 or SFX Scientific Calc Premium?
x36 is rated higher. x36 averages 5.0 out of 5 from 2 ratings, while SFX Scientific Calc Premium averages 4.3 from 3 ratings.
Do x36 or SFX Scientific Calc Premium have ads?
Neither x36 nor SFX Scientific Calc Premium shows ads.
Which is updated more often, x36 or SFX Scientific Calc Premium?
x36 ships an update every 2 months, and SFX Scientific Calc Premium monthly. Most recently, x36 was updated on November 2, 2026 and SFX Scientific Calc Premium on November 3, 2026.

Other comparisons