Comparison

Calculator # vs Chemistry Keyboard

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

Chemistry Keyboard

Easily input chemical formulas with specialized superscript, subscript, and arrow characters. Access lowercase Greek letters and other chemistry-related Unicode symbols. This keyboard extension works offline and includes a demo for viewing Wikipedia data.

Highlights
  • Superscript characters
  • Subscript characters
  • Arrow glyphs
  • Lowercase Greek characters
  • Chemistry Unicode characters
  • Offline functionality
  • Wikipedia data lookup demo
Features
Read full description

The Chemistry Keyboard is a specialized Keyboard Extension for anyone who needs to enter chemical formulae. Ever need to input Hg²⁺+2 I⁻ on your phone and can't figure out how to get those nice superscript or subscript 2s. Or proper arrow glyphs? Quickly generate superscripts: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁽ ⁾ ⁺ ⁻, subscripts: ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₍ ₎ ₊ ₋, and arrows. lowercase Greek characters available in landscape mode. and other chemistry related Unicode characters. The app itself demonstrates the keyboard's use by allowing text entry and looking up data from Wikipedia. Unlike many keyboard extensions, this keyboard does not require network access. It's entirely self contained.

Screenshots

Calculator #4 screens
Chemistry Keyboard3 screens

Verdict

The call

The clearest difference is price: Calculator # at Free against Chemistry Keyboard's $1.99. Calculator # also leads on ratings volume (36K vs 17) and update cadence (every 2 months vs every 6 months). Chemistry Keyboard's advantage is in-app purchases (none vs 6) and ads (none vs shown). On rating 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

Calculator # is free to download; Chemistry Keyboard costs $1.99 up front. Calculator # sells 6 in-app purchases, starting at $1.49 per month. Chemistry Keyboard asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Calculator # against 4.6 for Chemistry Keyboard. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 60% of Calculator #'s written reviews are positive against 88% of Chemistry Keyboard's.

UpkeepUpdate frequency

Calculator # ships an update every 2 months, Chemistry Keyboard every 6 months. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

Scorecard8 real differences · 2 level
Calculator # versus Chemistry Keyboard: the parameters behind the verdict, then further details
ParameterCalculator #Chemistry Keyboard
PriceFree — better$1.99
Rating4.6 (36K ratings)4.6 (17 ratings) — better
Positive reviews59.5% of reviews87.5% of reviews — better
Number of ratings36K — better17
Update frequencyEvery 2 months — betterEvery 6 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.0
Further details — not scored
Size57 MB9 MB
Age rating4+4+
DeveloperIncpt.MobisGenerally Helpful Software

Customer experience

Calculator #

All ratings35,876 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews467 reviews
Positive59.5%
Neutral6.4%
Negative34.0%

Chemistry Keyboard

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews24 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

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

Chemistry Keyboard

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

Chemistry Keyboard

No in-app purchases

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Chemistry Keyboard free?
Chemistry Keyboard costs $1.99, with no in-app purchases.
Which has better reviews, Calculator # or Chemistry Keyboard?
Chemistry Keyboard is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Chemistry Keyboard averages 4.6 from 17 ratings.
Do Calculator # or Chemistry Keyboard have ads?
Calculator # shows ads; Chemistry Keyboard does not.
Which is updated more often, Calculator # or Chemistry Keyboard?
Calculator # ships an update every 2 months, and Chemistry Keyboard every 6 months. Most recently, Calculator # was updated on November 3, 2026 and Chemistry Keyboard on November 1, 2026.

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