Comparison

Uncertainty Calculator vs Penseira

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

Penseira

This platform offers a comprehensive review system for medical residency exams using flashcards and an automated spaced repetition algorithm. It helps students remember information efficiently by predicting when they might forget and reminding them beforehand. Pre-made decks with over 20,000 cards are available, created by experts in the field.

Highlights
  • Spaced repetition algorithm
  • Automated review system
  • Pre-made flashcard decks
  • Over 20,000 flashcards
  • Expert-created content
  • Mobile platform
Features
Read full description

A revisão é o oxigênio da sua aprovação na residência médica. E nós sabemos que não é fácil revisar todo o conteúdo necessário e ainda se dedicar ao internato e estudar novos assuntos, não é? Foi pensando nisso que desenvolvemos a Penseira: uma plataforma completa de revisão por flashcards com um sistema automatizado de repetição espaçada. Nosso algoritmo é diferente de qualquer outro já criado e foi feito exclusivamente para estudantes de medicina. Adivinhamos quando você vai esquecer uma informação e te lembramos um pouquinho antes. Assim você fica sempre afiado pra responder questões de provas e até aquela pergunta maldosa do teu preceptor. Com a Penseira, lembrar será uma escolha! Ah! E quer saber o melhor? Não precisa se preocupar em criar suas próprias cartas. A tem um deck para provas de residência médica, com mais de 20 mil cartas criadas por quem mais entende do assunto no mercado. O aplicativo para smartphones é o coração da nossa plataforma.

Screenshots

Uncertainty Calculator4 screens
Penseira4 screens

Verdict

The call

The clearest difference is price: Penseira at Free against Uncertainty Calculator's $3.99. Penseira also leads on update cadence (every 5 weeks vs every 3 months) and iOS requirement (12.1 vs 17.0). On ads, in-app purchases 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

Penseira is free to download; Uncertainty Calculator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Uncertainty Calculator ships an update every 3 months, Penseira every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Uncertainty Calculator versus Penseira: the parameters behind the verdict, then further details
ParameterUncertainty CalculatorPenseira
Price$3.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews—66.7% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.012.1 — better
Further details — not scored
Size1 MB84 MB
Age rating4+17+
DeveloperRoman VolinskyMob Solution Desenvolvimento de Aplicativos Ltda .ME

Customer experience

Uncertainty Calculator

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

Penseira

Written reviews15 reviews
Positive66.7%
Neutral6.7%
Negative26.7%

In-app purchases

None

Uncertainty Calculator

No in-app purchases

None

Penseira

No in-app purchases

Questions

Is Uncertainty Calculator free?
Uncertainty Calculator costs $3.99, with no in-app purchases.
Is Penseira free?
Penseira is free to download, with no in-app purchases.
Do Uncertainty Calculator or Penseira have ads?
Neither Uncertainty Calculator nor Penseira shows ads.
Which is updated more often, Uncertainty Calculator or Penseira?
Uncertainty Calculator ships an update every 3 months, and Penseira every 5 weeks. Most recently, Uncertainty Calculator was updated on November 2, 2026 and Penseira on November 3, 2026.

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