Comparison

Calculator # vs Molecule Simulator

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

Molecule Simulator

Visualize the 3D structures of molecules using data from PubChem and Protein Data Bank. Explore molecules in various viewing modes and download an extensive library of compounds.

Highlights
  • 3D molecular visualization
  • Space filling mode
  • Ball-and-stick mode
  • Data from PubChem
  • Data from Protein Data Bank
  • Downloadable molecule library
Features
Read full description

This app is a molecular viewer. With the data on PubChem and Protein Data Bank, it can show us 3D structure of molecules. Both space filling mode and ball-and-stick mode. --------------------------------------------- Contains some pre-installed modes. And you can download all kinds of molecules from PubChem or Protein Data Bank.

Screenshots

Calculator #4 screens
Molecule Simulator4 screens

Verdict

The call

The clearest difference is review sentiment: Molecule Simulator at 100% against Calculator #'s 60%. Molecule Simulator also leads on in-app purchases (none vs 6) and ads (none vs shown). Calculator #'s advantage is ratings volume (36K vs 24) and rating (4.6 vs 4.3). On price, update cadence 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. Molecule Simulator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculator # holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 24, so its average is the more settled of the two. Written reviews complicate that: 60% of Calculator #'s written reviews are positive against 100% of Molecule Simulator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calculator # ships an update every 2 months, Molecule Simulator every 4 months. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.

Scorecard7 real differences · 3 level
Calculator # versus Molecule Simulator: the parameters behind the verdict, then further details
ParameterCalculator #Molecule Simulator
PriceFreeFree
Rating4.6 (36K ratings) — better4.3 (24 ratings)
Positive reviews59.7% of reviews100.0% of reviews — better
Number of ratings36K — better24
Update frequencyEvery 2 months — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.0
Further details — not scored
Size57 MB8 MB
Age rating4+4+
DeveloperIncpt.Mobis仕清 刘

Customer experience

Calculator #

All ratings35,876 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews466 reviews
Positive59.7%
Neutral6.4%
Negative33.9%

Molecule Simulator

All ratings22 ratings
Positive86.4%
Neutral0.0%
Negative13.6%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Molecule Simulator

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

Molecule Simulator

No in-app purchases

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Molecule Simulator free?
Molecule Simulator is free to download, with no in-app purchases.
Which has better reviews, Calculator # or Molecule Simulator?
Calculator # is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Molecule Simulator averages 4.3 from 24 ratings.
Do Calculator # or Molecule Simulator have ads?
Calculator # shows ads; Molecule Simulator does not.
Which is updated more often, Calculator # or Molecule Simulator?
Calculator # ships an update every 2 months, and Molecule Simulator every 4 months. Most recently, Calculator # was updated on October 20, 2026 and Molecule Simulator on October 8, 2026.

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