Comparison

Uncertainty Calculator vs Kotlin Programming Compiler

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

Head to head
About

Uncertainty Calculator

This app allows users to perform error propagation calculations for mathematical expressions involving uncertain variables. It supports absolute and relative error inputs, various functions, and trigonometric calculations in degrees or radians. The tool helps ensure accurate reporting of results based on estimated errors.

Highlights
  • Error propagation calculations
  • Absolute and relative error input
  • Support for mathematical functions
  • Trigonometric calculations (degrees/radians)
  • Variable combination in expressions
  • Significant figure guidance
Features
Read full description

Uncertainty Calculator evaluates the error propagation throughout the mathematical expressions comprised of variables of uncertain value. The application allows input of up to three value-error pairs (A, B and C), that can be used as a parameters in the final expression. Error values should be provided in absolute (100 +/- 5) or in relative format, the latter should appear in percent format (100 +/- 5%). The evaluated expression can include numerous functions, that provided by row of the appropriate buttons. Components and functions can be added directly to the expression field by pressing the corresponding buttons. To encompass expression into the preset formula, select the expression and press the corresponding formula button. Particular attention should be paid to placing brackets to avoid equation ambiguity. The application deals with independent, random errors. So if this is a case never use A + A, but rather 2*A and never A*A*A but rather A^3! Obviously, different parameters can be combined in any way (A+B or C *A^2 .. is perfectly fine). Angles for trigonometric functions can be provided in degrees or radians, and that should be reflected by setting a yellow button to "DEG" or "RAD". Bear in mind the importance of units in any of calculations! Implementation Examples: 1.The charge passing through an electrical circuit is defined by: Q = I * t, where I is the current and t is the time. Calculate the total charge value when a current of 0.15 ± 0.01 A passes through the circuit for 120 ± 1 s: Input: A = 0.15 ± 0.01, B = 120 ± 1 The final expression will be A*B, and press Calculate: The final value will be: 18 ± 1.2 Thus, it can be reported the total charge as 18 C ± 1 C. Important! One should only report as many significant figures as are consistent with estimated error! So the value should be rounded to the rightmost decimal place at which error applies. 2. A ball is tossed straight up into the air with initial speed vo = (4.0± 0.2) m/s. After a time t = (0.60 ± 10%) s, the height of the ball is h = vo*t - 0.5gt^2 = 0.636 m (g = 9.80 m/s^2). What is the value and uncertainty of height? Input: A = vo = 4.0 ± 0.2, and B = t = 0.60 ± 10%, then the final expression should be: A*B – 0.5*9.8*B^2 The final value will be: 0.6 ± 0.4 (meters).

About

Kotlin Programming Compiler

Write and execute Kotlin code directly on your mobile device. This app is designed for learning and testing code snippets with features like syntax highlighting and a custom keyboard. It allows you to compile, run, and share your Kotlin files.

Highlights
  • Compile and run Kotlin programs
  • View program output and errors
  • Custom keyboard for easy input
  • Advanced source code editor
  • Syntax highlighting and line numbers
  • Open, save, import, and share files
Features
Read full description

Write Kotlin code directly on your iPhone, iPad and iPod Touch! This app is ideal for learning and testing code snippets! Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference. Kotlin is designed to interoperate fully with Java, and the JVM version of its standard library depends on the Java Class Library, but type inference allows its syntax to be more concise. Kotlin mainly targets the JVM, but also compiles to JavaScript or native code (via LLVM). Kotlin is sponsored by JetBrains and Google through the Kotlin Foundation. Features: - Compile and run your program - View program output or detailed error - Custom keyboard for easy input of frequently used characters - Optimized for connecting with external physical/bluetooth keyboard - Advanced source code editor with syntax highlighting, bracket completion and line numbers - Open, save, import and share Kotlin files. Limitations: - Internet connection is required for compilation - Maximum program running time is 20s - One file can be run at a time - Some file system, network and graphics functions may be limited - This is a batch compiler; interactive programs are not supported. For example, if your program provides an input prompt, enter the input in the Input tab prior to compilation.

Screenshots

Uncertainty Calculator4 screens
Kotlin Programming Compiler4 screens

Verdict

The call

The clearest difference is price: Kotlin Programming Compiler at Free against Uncertainty Calculator's $3.99. Kotlin Programming Compiler also leads on ratings volume (7 vs 1) and iOS requirement (12.0 vs 17.0). Uncertainty Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence 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

Kotlin Programming Compiler is free to download; Uncertainty Calculator costs $3.99 up front. Kotlin Programming Compiler sells 1 one-off in-app purchase. Uncertainty Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Uncertainty Calculator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Kotlin Programming Compiler has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Uncertainty Calculator ships an update every 3 months, Kotlin Programming Compiler every 2 months. The most recent releases landed on September 14, 2026 and August 16, 2026 respectively.

Scorecard7 real differences · 3 level
Uncertainty Calculator versus Kotlin Programming Compiler: the parameters behind the verdict, then further details
ParameterUncertainty CalculatorKotlin Programming Compiler
Price$3.99Free — better
Rating5.0 (1 ratings) — better4.6 (7 ratings)
Positive reviews—62.5% of reviews
Number of ratings17 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.012.0 — better
Further details — not scored
Size1 MB20 MB
Age rating4+4+
DeveloperRoman VolinskyKetan Appa

Customer experience

Uncertainty Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Kotlin Programming Compiler

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews8 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

In-app purchases

None

Uncertainty Calculator

No in-app purchases

1 purchases

Kotlin Programming Compiler

One-time1
  • Upgrade$2.99

Questions

Is Uncertainty Calculator free?
Uncertainty Calculator costs $3.99, with no in-app purchases.
Is Kotlin Programming Compiler free?
Kotlin Programming Compiler is free to download, with in-app purchases available.
Which has better reviews, Uncertainty Calculator or Kotlin Programming Compiler?
Uncertainty Calculator is rated higher. Uncertainty Calculator averages 5.0 out of 5 from 1 ratings, while Kotlin Programming Compiler averages 4.6 from 7 ratings.
Do Uncertainty Calculator or Kotlin Programming Compiler have ads?
Kotlin Programming Compiler shows ads; Uncertainty Calculator does not.
Which is updated more often, Uncertainty Calculator or Kotlin Programming Compiler?
Uncertainty Calculator ships an update every 3 months, and Kotlin Programming Compiler every 2 months. Most recently, Uncertainty Calculator was updated on September 14, 2026 and Kotlin Programming Compiler on August 16, 2026.

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