Halcyon Calc vs Bayes Theorem Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Halcyon Calc
A powerful calculator app for students, engineers, and scientists. It handles complex numbers, symbolic expressions, unit conversions, and matrix operations, with advanced plotting and programming capabilities.
- Complex number calculations
- Symbolic expression manipulation
- Unit conversion with custom units
- Matrix and vector operations
- Symbolic plotting
- Programming of custom operations
- Statistical data analysis
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For students, engineers, scientists or people who fondly remember classic calculators, Halcyon Calc is a great application for manipulating numbers and even symbolic expressions. Features: - Use this calculator on an iPhone, iPod Touch or an iPad - Use your finger to quickly scroll through the stack to review intermediate results - Copy and paste support - Over 225 built-in operations, including trig, logarithms, real functions, complex operations and more - Allows you to work with real, complex and integer numbers. - Real and complex numbers can be displayed in standard, fixed, scientific and engineering format - Use over 120 built-in units to perform unit conversion or create your own units if the one you want is not already there - Integer numbers can be displayed in decimal, hexadecimal, octal and binary bases - Work with real and complex matrices and vectors. - Enter symbolic expressions and solve them for different values. Even better, solve quadratic formulas, collect and expand factors and terms, find minima, maxima and roots of any expression. - Plot symbolic expressions in X/Y coordinates. Pan the coordinate space by dragging the plot in any direction. Zoom in and out using a pinch gesture. - Determine symbolic derivative, taylor series or numeric integral of an expression. - Store numbers, lists, strings and expressions in symbols. Create hierarchies of symbols to allow you to organize your calculations. - Create sequences of calculator commands into programs, creating your own operations which you can then include in expressions. - Store statistical data and calculate totals, averages, standard deviations, linear regressions, etc over that data. - Calculate the probabilities associated with standard distributions like the normal, F and T distributions.
Bayes Theorem Calculator
Calculate event probabilities using Bayes' theorem. This utility app provides a straightforward way to apply the theorem for probability calculations.
- Bayes' theorem calculation
- Probability of event calculation
- Utility tool
- Simple interface
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The Bayes' theorem calculator helps you calculate the probability of an event using Bayes' theorem.
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Verdict
The clearest difference is review sentiment: Halcyon Calc at 100% against Bayes Theorem Calculator's 0%. Halcyon Calc also leads on rating (4.9 vs 1.0) and ratings volume (18 vs 1). Bayes Theorem Calculator's advantage is price (Free vs $4.99) and update cadence (every 5 days vs every 4 months). 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
Bayes Theorem Calculator is free to download; Halcyon Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Halcyon Calc holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Halcyon Calc has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Halcyon Calc's written reviews are positive against 0% of Bayes Theorem Calculator's.
Halcyon Calc ships an update every 4 months, Bayes Theorem Calculator every 5 days. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.
| Parameter | Halcyon Calc | Bayes Theorem Calculator |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.9 (18 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 18 — better | 1 |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Halcyon Touch Software | Stage Coding |
Customer experience
Halcyon Calc
Bayes Theorem Calculator
In-app purchases
Halcyon Calc
No in-app purchases
Bayes Theorem Calculator
No in-app purchases
Questions
Is Halcyon Calc free?
Is Bayes Theorem Calculator free?
Which has better reviews, Halcyon Calc or Bayes Theorem Calculator?
Do Halcyon Calc or Bayes Theorem Calculator have ads?
Which is updated more often, Halcyon Calc or Bayes Theorem Calculator?
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