Comparison

Calculator # vs Probability

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

Head to head
About

Calculator #

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Highlights
  • Math Photos Solver
  • Handwriting Recognition
  • AI Math Problem Solver
  • Mathematical Display
  • Equation Solvers
  • 2D Graphing
  • Algebraic Functions
Features
Read full description

◉ Over 11,000,000 Downloads Worldwide ◉ Top Free Utilities Apps in US, UK, AUS, CAN, GER,... ◉ Rated & Reviewed on ILoveFreeSoftware.com FREE Alternative to Graphing TI-83, TI-84, TI-89, Casio FX, Sharp EL,... Calculator # – The free, multi-function calculator for iPhone/iPad is proud to offer a variety of features to satisfy wide ranges of customers: The App possesses a powerful math core and algebra engine with mathematical display support, making it a viable tool for everyone from those looking for basic calculation to more advanced users, such as scientific computation, engineers, and math students. Calculator # makes available everything you need – including a user manual and tutorial video clips – so you can master the app in a matter of minutes! ◉ Official Website: http://iPhoneCalculator.com ◉ ADVANCED FEATURES: ▸ Math Photos Solver * ▸ Handwriting Recognition * ▸ Math Problem Solver (AI) * ◉ GENERAL FEATURES: ▸ Universal Calculator App ▸ Support All the Latest Devices ¹ ▸ Support Multitasking (iPad) ▸ Support Wireless KB ² ▸ Mathematical Display ▸ Edit & Export Expression/Result ▸ History Tape View ▸ Basic Calculations (+, -, x, ÷, %, Abs,...) ▸ Advanced Functions (Sin,Cos,Ln,X!, ^, √,…) ▸ 14 Memory Variables (Including X,Y,Z,M) ▸ Assignment Operator ▸ F(x) Customize Functions (F1 Only) ▸ Fraction and Degree/Angle Calculation ▸ Numeric Integral Calculation ▸ Dual Skins (Silver Light & Carbon+) ◉ ALGEBRA FEATURES: ▸ Big Integer & Rational Number (Up to 30!) ▸ Expand and Factor Polynomials ▸ Basic Indefinite integral ◉ EQUATIONS SOLVERS: ▸ Quadratic Equations ▸ System of Linear Equations (2 Unknowns) ◉ 2D GRAPH: ▸ Snap to Points ▸ Smooth Zoom & Transformation ▸ Support F(X,Y) = 0. E.g. Sin(X) + Cos(Y) = 0. ◉ MULTIPLE LANGUAGES: ▸ English, Spanish, German, ▸ French, Japanese, Chinese (*) In-App-Purchase is required ¹: Include iPhone 6/6S+ HD Retina Display ²: Standard English KB We love your feedback, Thanks a lot ! Terms of Service: https://iphonecalculator.com/terms-of-service/

About

Probability

Enhance your decision-making skills by learning to assess probabilities with this app. It offers formulas for problem-solving, note-taking capabilities, and interactive tools like dice and coin tosses for practical learning.

Highlights
  • Probability assessment
  • Decision-making improvement
  • Problem-solving formulas
  • Personalized notes
  • Dice and coin toss simulations
Features
Read full description

Probability is the key to making decisions under uncertainty, and with our app,  you can improve your ability to assess probabilities and make better decisions in life.  Our app includes different formulas to help you solve problems and make decisions,  as well as the option to take references and write down your own notes about probability.  Plus, you can have fun with probability by tossing dice and coins.

Screenshots

Calculator #4 screens
Probability4 screens

Verdict

The call

The clearest difference is review sentiment: Calculator # at 60% against Probability's 0%. Calculator # also leads on rating (4.6 vs 1.0) and ratings volume (36K vs 1). Probability's advantage is ads (none vs shown) and update cadence (every 10 days vs every 2 months). On price, in-app purchases, 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

Both are free to download. Calculator # sells 6 in-app purchases, starting at $1.49 per month and Probability sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calculator # holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 60% of Calculator #'s written reviews are positive against 0% of Probability's.

UpkeepUpdate frequency

Calculator # ships an update every 2 months, Probability every 10 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

Scorecard6 real differences · 4 level
Calculator # versus Probability: the parameters behind the verdict, then further details
ParameterCalculator #Probability
PriceFreeFree
Rating4.6 (36K ratings) — better1.0 (1 ratings)
Positive reviews59.8% of reviews — better0.0% of reviews
Number of ratings36K — better1
Update frequencyEvery 2 monthsEvery 10 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.1 — better14.0
Further details — not scored
Size57 MB166 MB
Age rating4+4+
DeveloperIncpt.MobisMan Hung Sun

Customer experience

Calculator #

All ratings35,876 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews465 reviews
Positive59.8%
Neutral6.5%
Negative33.8%

Probability

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Calculator #

Reported bugs

3 issues
  • Crashes when trying to use certain functions
  • Handwriting recognition not working reliably
  • Inability to input negative numbers

Requested features

3 requests
  • Add option to turn off animation
  • Improve ad placement to avoid obstructing usage
  • Provide more transparency on paid features

Probability

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Calculator #

Subscriptions4
  • PRO Upgrade 1 Month3 Days trial$1.491 Month
  • PRO Upgrade 3 Months7 Days trial$2.993 Months
  • PRO + Recognition 1 Month$4.991 Month
Show 1 more
  • PRO + Recognition 3 Months$11.993 Months
One-time2
  • 250 AI Recognition & Queries$0.99
  • 600 AI Recognition & Queries$1.99
1 purchases

Probability

One-time1
  • Upgrade$0.99

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Probability free?
Probability is free to download, with in-app purchases available.
Which has better reviews, Calculator # or Probability?
Calculator # is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Probability averages 1.0 from 1 ratings.
Do Calculator # or Probability have ads?
Calculator # shows ads; Probability does not.
Which is updated more often, Calculator # or Probability?
Calculator # ships an update every 2 months, and Probability every 10 days. Most recently, Calculator # was updated on October 15, 2026 and Probability on October 5, 2026.

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