Statistics Calculator+++ vs Open Pi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Statistical calculations
- Regression analysis
- Probability distributions
- Confidence intervals
- Hypothesis tests
- Data visualization plots
- Import data from CSV
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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.
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.
- Real-time system monitoring
- SSH terminal access
- Docker container management
- GPIO control
- File manager
- Wake-on-LAN Helper
- Remote system actions
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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
Verdict
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
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.
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.
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.
| Parameter | Statistics Calculator+++ | Open Pi |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.3 (46 ratings) | 4.4 (9 ratings) — better |
| Positive reviews | 73.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 46 — better | 9 |
| Update frequency | Every 13 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Dogahe | Artem Svitelskyi |
Customer experience
Statistics Calculator+++
Open Pi
In-app purchases
Statistics Calculator+++
No in-app purchases
Open Pi
- Single (Lifetime)$5.99
- Family (Lifetime)$12.99
Questions
Is Statistics Calculator+++ free?
Is Open Pi free?
Which has better reviews, Statistics Calculator+++ or Open Pi?
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Which is updated more often, Statistics Calculator+++ or Open Pi?
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