Comparison

Statistics Calculator+++ vs Open Pi

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

Head to head
About

Statistics Calculator+++

Perform advanced statistical calculations, including regression analysis, probability distributions, and hypothesis tests. Easily input data, visualize results with plots, and import data from spreadsheets. Offers a user-friendly interface for complex statistical operations.

Highlights
  • Statistical calculations
  • Regression analysis
  • Probability distributions
  • Confidence intervals
  • Hypothesis tests
  • Data visualization plots
  • Import data from CSV
Read full description

Statistics Calculator+++ is a scientific calculator with statistical, regression analysis, probability distributions, confidence intervals, and hypothesis tests capabilities. In designing the statistics functions of this app we had one thing in mind: The user should not need to read a single line of manual to perform the statistical analysis. Simply use Add X, Add Y, and Add f buttons to enter the elements of the lists and frequencies, if any, and you are done. All the statistics and regression models are only a few taps and swipes away. Tap the List button to see the lists entered. The elements of the lists are interpreted independently (as two separate lists) and jointly for regression analysis (if the size of the lists are equal). You can also take advantage of a new import feature to bring in your data from Microsoft Excel or Apple Numbers by first converting them into .csv format. Statistics measure and plots: - Sum, mean, population standard deviation, sample standard deviation, sample variance, sum of squares, min, max, quartiles, and sum of multiplications of two lists are . - Box and whiskers plot, histogram of the data, linear, area, scatter plot, and moving average. Regression: - Linear, logarithmic, exponential, power, and quadratic regressions. An extremely simple and intuitive user interface to choose the regression model and calculate predictions for x and y values and view residuals and residual sum of squares. It also graphs the regression model and how it fits around the data entered. You have the capability to save multiple lists of data and use any of them as list X, list Y, or list f. Access Lists Editor feature by tapping the icon on top right of the Statistics Lists view. Furthermore, all these lists persist in the memory. Therefore, if you close and the relaunch the app the lists are there for you. Normal distribution functionality of TI-83/TI-84 (normalpdf, normalcdf, invNorm, ShadeNorm), Student's t-distribution (tpdf, tcdf, invT), Chi-Squared distribution, F distribution, Binomial distribution (binompdf, binomcdf), Poisson distribution (poissonpdf, poissoncdf), and Geometric distribution (geometpdf, geometcdf) are all possible with this app with an easy to use, and beautiful user interface. In addition you have Beta and Gamma Distributions. Confidence interval calculation and step by step explanation for "One Population Proportion", "Difference in Two Population Proportions", "Population Mean", and "Difference in Population Means". Hypothesis test for "Population Proportion", "Difference in Two Population Proportions", "Population Mean" and "Population Mean Difference" with known and unknown population standard deviations. Other major features of Statistics Calculator+++ are: - The left pane scrolls to reveal more functionality without a need to switch modes. - You see the expression as you enter and it keeps a history of your calculations - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization. - Quadratic and system of two linear equations solver - Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers) - Throws a set of dice (choice of 1 die to 4 dice) - Backspace to delete last digit entered. This is an ongoing project and we are working on more features and functions to be added to every update of the app. You are going to love the simplicity of the user interface and yet have the powerful functionality with which Statistics Calculator+++ is loaded.

About

Open Pi

Manage your Raspberry Pi devices remotely without cloud services. Monitor system health, control Docker, run commands, transfer files, and manage GPIO from a modern, privacy-focused interface.

Highlights
  • Real-time system monitoring
  • SSH terminal access
  • Docker container management
  • GPIO control
  • File manager
  • Wake-on-LAN Helper
  • Remote system actions
Features
Read full description

Direct, local, and private Raspberry Pi management. Open Pi lets you monitor system health, manage Docker containers, and run SSH commands on your Raspberry Pi right from your phone. No cloud servers, accounts, or subscriptions. Built for homelabs, self-hosting, IoT projects, and software development. Key Features • System Health: Real-time CPU, RAM, storage, and temperature metrics • Docker Management: View, start, stop, and restart containers • Terminal: Secure SSH command-line access over local network or VPN • File Manager: Direct file uploads and downloads • GPIO Control: Monitor and toggle pins • Auto-Discovery: Detect devices automatically on local networks • System Actions: Wake-on-LAN helper, remote reboot, and alerts Privacy • Native SSH connection with no background agents • No accounts, tracking, or telemetry • Local-first architecture with zero subscriptions • All data stays on your local network

Screenshots

Open Pi4 screens

Verdict

The call

The clearest difference is price: Open Pi at Free against Statistics Calculator+++'s $2.99. Open Pi also leads on update cadence (weekly vs every 13 months) and review sentiment (100% vs 73%). Statistics Calculator+++'s advantage is in-app purchases (none vs 2) and ratings volume (46 vs 9). On rating, ads, monetization model 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

Open Pi is free to download; Statistics Calculator+++ costs $2.99 up front. Open Pi sells 2 one-off in-app purchases. Statistics Calculator+++ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for Statistics Calculator+++ against 4.4 for Open Pi. That said, the two scores are not equally well evidenced: Statistics Calculator+++ has 46 ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 73% of Statistics Calculator+++'s written reviews are positive against 100% of Open Pi's.

UpkeepUpdate frequency

Statistics Calculator+++ ships an update every 13 months, Open Pi weekly. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
Statistics Calculator+++ versus Open Pi: the parameters behind the verdict, then further details
ParameterStatistics Calculator+++Open Pi
Price$2.99Free — better
Rating4.3 (46 ratings)4.4 (9 ratings) — better
Positive reviews73.3% of reviews100.0% of reviews — better
Number of ratings46 — better9
Update frequencyEvery 13 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPadiPhone, iPad — better
Requires iOS14.0 — better18.0
Further details — not scored
Size4 MB43 MB
Age rating4+4+
DeveloperDogaheArtem Svitelskyi

Customer experience

Statistics Calculator+++

All ratings44 ratings
Positive84.1%
Neutral0.0%
Negative15.9%
Written reviews15 reviews
Positive73.3%
Neutral0.0%
Negative26.7%

Open Pi

All ratings9 ratings
Positive77.8%
Neutral11.1%
Negative11.1%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Statistics Calculator+++

No in-app purchases

2 purchases

Open Pi

One-time2
  • Single (Lifetime)$5.99
  • Family (Lifetime)$12.99

Questions

Is Statistics Calculator+++ free?
Statistics Calculator+++ costs $2.99, with no in-app purchases.
Is Open Pi free?
Open Pi is free to download, with in-app purchases available.
Which has better reviews, Statistics Calculator+++ or Open Pi?
Open Pi is rated higher. Statistics Calculator+++ averages 4.3 out of 5 from 46 ratings, while Open Pi averages 4.4 from 9 ratings.
Do Statistics Calculator+++ or Open Pi have ads?
Neither Statistics Calculator+++ nor Open Pi shows ads.
Which is updated more often, Statistics Calculator+++ or Open Pi?
Statistics Calculator+++ ships an update every 13 months, and Open Pi weekly. Most recently, Statistics Calculator+++ was updated on October 14, 2026 and Open Pi on October 11, 2026.

Other comparisons