Comparison

Calculate Standard Deviation vs Epi Tools

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

Head to head
About

Calculate Standard Deviation

This app calculates standard deviation, variance, and other statistical measures for a given set of values. It simplifies complex statistical formulas with a user-friendly interface and accurate results.

Highlights
  • Calculate Standard Deviation
  • Calculate Variance
  • Calculate Mean
  • Calculate Coefficient of Variance
  • Calculate Standard Error of Mean
  • User-friendly interface
  • Accurate statistical results
Features
Read full description

Make a use of this standard deviation calculator app to attain the results for standard deviation calculations right now: In the context of statistics, the term standard deviation (SD) refers to the variation or dispersion of the data set of values. A lower SD (also called estimated value) shows that the data points exist very close to the origin. Whereas a higher value of it leads the data points to disperse over a wider range of the values. Use this standard deviation app to determine the standard deviation and variance with a single click. With the help of SD, you can easily find how close the sample mean is to the actual mean of the population. You can use this standard deviation calculator app for to generate absolute outputs. Calculate Standard Deviation of A Set of Values: The SD is calculator on the basis of the following terms: Count of Values: It is the number of the values in the data set. Total Sum of Values: Summation represents the addition of all the values that are given in the data set Standard Mean: It refers to the average of all the values in the set of values. Use this mean and standard deviation calculator to find the mean instantly. Variance: The actual dispersion of data from the mean position is called variance. You can work for the variance with the help of this variance calculator. Coefficient of Variance: The amplitude of the data dispersion about the mean is known as coefficient of variance. Standard Error of Mean: The approximate deviation of the population from mean is known as standard error of mean. This standard error calculator helps you to estimate the actual error of mean precisely. SD helps you in performing various statistical calculations with larger data sets. Now there’s no need to stick with daunting statistical formulas to proceed with SD calculation as our variance and standard deviation calculator does all in a few clicks. Apart from the formulas that are difficult to remember, it is a better practice to use this app for absolutely. How Does It Work? This mean absolute deviation calculator app determines the following terms: Standard Deviation Count of Values Total Sum of Values Mean of The Values Variance Coefficient of Variance Standard Error of Mean (SE) Other Features Includes: User-Friendly Interface An easy to use keyboard with a particular key to enter repetition of same number with one single tap Versatile input box that enlarges as you write data point values Most accurate statistical results The standard deviation tells you how wide and curved the graph will be. If you know the above mentioned terms, you have everything that you need in actual for determining standard deviation. Also for the sake of you people, standard deviation calculator is designed to find accurate output corresponding to the terms defined. Hope it will help you for sure. Privacy Policy: https://calculator-online.net/privacy-policy/ Terms of Service: https://calculator-online.net/terms-of-service/

About

Epi Tools

This app provides a suite of epidemiological calculation tools for disease frequency, association, and effect measures. It also includes sample size calculators, diagnostic test validation, and a comprehensive glossary of terms.

Highlights
  • Measures of disease frequency with confidence intervals
  • Measures of association and effect
  • Sample size calculators
  • Diagnostic test validation
  • Post-test probability estimation
  • Random number generator
  • Epidemiology glossary
Features
Read full description

Functions include measures of disease frequency (including confidence intervals for prevalence, incidence risk and incidence rates), measures of association and measures of effect (from 2 × 2 table data), various sample size calculators, diagnostic test validation, estimation of the post-test probability of disease, a random number generator and a comprehensive epidemiology glossary.

Screenshots

Calculate Standard Deviation4 screens
Epi Tools4 screens

Verdict

The call

The clearest difference is review sentiment: Epi Tools at 100% against Calculate Standard Deviation's 50%. Epi Tools also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 1). Calculate Standard Deviation's advantage is ratings volume (62 vs 1). 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. Calculate Standard Deviation sells 1 one-off in-app purchase. Epi Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Epi Tools holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Calculate Standard Deviation has 62 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Calculate Standard Deviation's written reviews are positive against 100% of Epi Tools's.

UpkeepUpdate frequency

Calculate Standard Deviation ships an update every 7 months, Epi Tools every 2 months. Both last shipped on November 3, 2026.

Scorecard8 real differences · 2 level
Calculate Standard Deviation versus Epi Tools: the parameters behind the verdict, then further details
ParameterCalculate Standard DeviationEpi Tools
PriceFreeFree
Rating4.5 (62 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings62 — better1
Update frequencyEvery 7 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.4 — better
Further details — not scored
Size39 MB19 MB
Age rating4+12+
DeveloperAsad AhsanMark Stevenson

Customer experience

Calculate Standard Deviation

All ratings62 ratings
Positive88.7%
Neutral3.2%
Negative8.1%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Epi Tools

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

In-app purchases

1 purchases

Calculate Standard Deviation

One-time1
  • Standard Deviation Premium$4.99
None

Epi Tools

No in-app purchases

Questions

Is Calculate Standard Deviation free?
Calculate Standard Deviation is free to download, with in-app purchases available.
Is Epi Tools free?
Epi Tools is free to download, with no in-app purchases.
Which has better reviews, Calculate Standard Deviation or Epi Tools?
Epi Tools is rated higher. Calculate Standard Deviation averages 4.5 out of 5 from 62 ratings, while Epi Tools averages 5.0 from 1 ratings.
Do Calculate Standard Deviation or Epi Tools have ads?
Calculate Standard Deviation shows ads; Epi Tools does not.
Which is updated more often, Calculate Standard Deviation or Epi Tools?
Calculate Standard Deviation ships an update every 7 months, and Epi Tools every 2 months. Most recently, Calculate Standard Deviation was updated on November 3, 2026 and Epi Tools on November 3, 2026.

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