Comparison

Calculator # vs Standard Deviation

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
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◉ 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

Standard Deviation

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SD calculator is an iOS application developed for the calculation of standard deviation problems. It includes entering data values and selecting the type of standard deviation i.e. sample or population. Features of standard deviation calculator Design The design of this application is unique and its style and theme are attractive. This app is designed to top all the other apps out there in the design department. Input field The input field is easy to use to enter data and get the result. Simply, add the comma-separated values and choose the type of standard deviation. Multiple options There are multiple options available in this application as you can get the mean, sample standard deviation, population standard deviation, deviation (difference of data values from the mean), square of deviation, sample variance, and population variance. Results The step-by-step solution will be provided just after hitting the calculate button for the sample and population data. This will help you to ease up the lengthy and time-consuming calculation in a fraction of a second. How to use a standard deviation calculator? This application is easy to use, but just in case you need a guide, here it is. • First of all, enter the comma-separated values into the input box. • Select the type of the standard deviation i.e. sample or population. • Press the calculate button. • The step-by-step result will show just after pressing the calculate button • Hit the reset button to enter new data.

Screenshots

Calculator #4 screens
Standard Deviation4 screens

Verdict

The call

The clearest difference is in-app purchases: Standard Deviation at none against Calculator #'s 6. Standard Deviation also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Standard Deviation asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

Scorecard2 real differences · 8 level
Calculator # versus Standard Deviation: the parameters behind the verdict, then further details
ParameterCalculator #Standard Deviation
PriceFreeFree
Rating4.6 (36K ratings) — better—
Positive reviews59.8% of reviews—
Number of ratings36K — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.1 — better13.0
Further details — not scored
Size57 MB21 MB
Age rating4+4+
DeveloperIncpt.MobisAhmad Sattar

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

Standard Deviation

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
None

Standard Deviation

No in-app purchases

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Standard Deviation free?
Standard Deviation is free to download, with no in-app purchases.
Do Calculator # or Standard Deviation have ads?
Calculator # shows ads; Standard Deviation does not.
Which is updated more often, Calculator # or Standard Deviation?
Calculator # ships an update every 2 months, and Standard Deviation every 2 months. Most recently, Calculator # was updated on October 15, 2026 and Standard Deviation on September 30, 2026.

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