Comparison

Probability Calculator Plus vs Virtual Eye Pro

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

Head to head
About

Probability Calculator Plus

Master probability and statistics with instant, step-by-step solutions for various calculations and distributions. Includes a random experiment simulator and a comprehensive reference guide.

Highlights
  • Basic and conditional probability calculations
  • Venn diagram calculator with visual representation
  • Statistical distributions (Binomial, Normal, Poisson)
  • Random experiment simulator (dice, coins, cards)
  • Step-by-step solutions for all calculations
  • Calculation history and reference guide
Features
Read full description

Master probability and statistics with Probability Calculator — the most complete probability calculator for students, teachers, and data enthusiasts. Whether you're studying for an exam, teaching a class, or working through real-world statistics problems, ProbCalc gives you instant answers with full step-by-step solutions so you truly understand the math. - PROBABILITY CALCULATIONS - • Basic Probability — Calculate P(A) from favorable and total outcomes • Conditional Probability — Solve P(A|B) = P(A∩B) / P(B) • Independent Events — Multiply probabilities across multiple events • Dependent Events — P(A∩B) = P(A) × P(B|A) • Venn Diagram Calculator — Input P(A) and P(B), instantly get P(A∩B), P(A∪B), P(A XOR B), and occurrence probabilities over N trials — complete with visual Venn diagram • Custom Calculator — Enter values as fractions, decimals, or percentages - STATISTICAL DISTRIBUTIONS - • Binomial Distribution — P(X=k), mean, variance, and standard deviation • Normal Distribution — P(a ≤ X ≤ b) with z-score computation and CDF • Poisson Distribution — P(X=k) with λ parameter, mean, and variance -RANDOM EXPERIMENT SIMULATOR - Roll dice, flip coins, and draw cards — all with real probability charts: • Dice: D4, D6, D8, D10, D12, D20 (roll up to 6 at once) • Coins: Flip 1–10 coins simultaneously • Cards: Draw from a standard 52-card deck • Live frequency chart updates with every trial - STEP-BY-STEP SOLUTIONS - Every calculation shows the full working — formula, substitution, and result. Perfect for checking homework, preparing for exams, or learning how probability really works. - CALCULATION HISTORY - Every result is automatically saved. Search, review, and copy any previous calculation. Swipe to delete. Tap for full detail with all steps. -REFERENCE GUIDE - Built-in reference includes: • Complete probability and distribution formulas • Standard Normal Z-table (z = −3.0 to +3.0) • Interactive combinations C(n,r) and permutations P(n,r) calculator - DESIGNED FOR EVERYONE - Clean, distraction-free interface with full Dark Mode support. Tap any result to copy it instantly. Works on iPhone and iPad. No ads. No subscriptions. No internet required. Perfect for: • High school and university statistics courses • AP Statistics, IB Math, A-Level, SAT/ACT prep • College probability and statistics classes • Teachers preparing lessons and examples • Data analysts and business professionals Probability is the measure of the likelihood that an event will occur. Probability is quantified as a number between 0 and 1, where, loosely speaking, 0 indicates impossibility and 1 indicates certainty. Summary of probabilities: Probability that both the events occur P(A ∩ B) = P(A) x P(B). Probability that either of event occurs P(A U B) = P(A) + P(B) - P(A ∩ B). Conditional Probability P(A | B) = P(A ∩ B) / P(B). Conditional Probability P(B | A) = P(A ∩ B) / P(A). Exclusive OR of A and B P(A XOR B) = P(A) + P(B) - 2 X P(A ∩ B). Probability theory is used widely in such areas of study as mathematics, statistics, finance, gambling, science (in particular physics), artificial intelligence/machine learning, computer science, game theory, and philosophy to, for example, draw inferences about the expected frequency of events. Probability theory is applied in everyday life in risk assessment and modeling. The insurance industry and markets use actuarial science to determine pricing and make trading decisions. Governments apply probabilistic methods in environmental regulation, entitlement analysis (Reliability theory of aging and longevity), and financial regulation. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

About

Virtual Eye Pro

Features
Read full description

Discover the Human Eye in 3D – Anatomy, Functions, and Pathologies Take a deep dive into the fascinating world of the human eye with this interactive 3D educational app. Designed for students, teachers, and enthusiasts of anatomy and medicine, this app offers a comprehensive and highly visual way to explore every detail of the eye’s structure and its functions. From external anatomy to the most intricate internal mechanisms, you will be able to rotate, zoom, and interact with a fully detailed 3D model. The app goes beyond static diagrams by including animations, progressive visual effects, and clear explanations that make complex concepts easier to understand. Main Features: - Complete 3D Eye Dissection - Explore a full 3D dissection of the human eye, showing every part in detail. - View the eye cut in half to examine its internal components and understand how each structure fits together. - Rotate, zoom, and isolate specific parts to study them individually. - Internal Structures and Functions - Discover the cornea, lens, retina, iris, optic nerve, and more. - Understand how each element contributes to vision. - Visualize the eye’s accommodation system and how it adapts focus for near and far objects through interactive animations. - Pathology Studies - Learn about cataracts through progressive simulations that show how opacity in the lens develops and affects vision. - Study glaucoma with visualizations of intraocular pressure and its impact on the optic nerve. - See realistic progressions of these conditions through animations and effects. - Interactive Animations and Controllers - Control dissections with interactive animation tools. - Step through complex processes at your own pace, adjusting playback to focus on specific stages. - Observe progressive changes in both normal function and pathological states. - Informative Panels - Access detailed definitions of every part of the eye, from the cornea to the retina, including their roles in vision. - Explore dedicated explanations of cataracts and glaucoma, with clear language supported by visuals. - Use the app as both a quick reference tool and an in-depth learning resource. Why This App? The human eye is one of the most sophisticated organs in the body, and understanding its structure is key for students of medicine, biology, and health sciences. Traditional textbooks often make eye anatomy difficult to grasp because of the eye’s complexity and the limitations of 2D diagrams. This app breaks that barrier by offering a fully interactive 3D experience where you can explore the eye from every angle. Whether you are studying for exams, preparing lessons, or simply fascinated by biology, this app offers an intuitive and engaging way to learn. The addition of pathologies such as cataracts and glaucoma also makes it valuable for understanding common medical conditions that affect vision. Ideal For: - Medical students and healthcare professionals. - Teachers and educators in biology and anatomy. - Anyone interested in learning how the human eye works. With clear explanations, immersive 3D models, and dynamic animations, this app makes the study of the human eye both accessible and fascinating. Explore, learn, and understand vision like never before.

Screenshots

Probability Calculator Plus4 screens
Virtual Eye Pro4 screens

Verdict

The call

The clearest difference is price: Probability Calculator Plus at $2.99 against Virtual Eye Pro's $5.99. Virtual Eye Pro's advantage is iOS requirement (13.0 vs 17.6). 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

Probability Calculator Plus costs $2.99 and Virtual Eye Pro $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 7 level
Probability Calculator Plus versus Virtual Eye Pro: the parameters behind the verdict, then further details
ParameterProbability Calculator PlusVirtual Eye Pro
Price$2.99 — better$5.99
Rating3.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 23 months—
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size1 MB194 MB
Age rating4+4+
DeveloperHeng Jia LiangMilton Veliz Coronel

In-app purchases

None

Probability Calculator Plus

No in-app purchases

None

Virtual Eye Pro

No in-app purchases

Questions

Is Probability Calculator Plus free?
Probability Calculator Plus costs $2.99, with no in-app purchases.
Is Virtual Eye Pro free?
Virtual Eye Pro costs $5.99, with no in-app purchases.
Do Probability Calculator Plus or Virtual Eye Pro have ads?
Neither Probability Calculator Plus nor Virtual Eye Pro shows ads.

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