Comparison

Calculator # vs Conversion Calculator Units

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

Conversion Calculator Units

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

Highlights
  • Converts over 140 units
  • Supports 12 conversion categories
  • Customizable themes
  • Drag and set unit positions
  • Add units to favorites
  • Share converted units via email
Features
Read full description

* Handy Conversion Calculator App For 12 Categories & 140+ Units * Simple, Powerful & Conversion Calculator app designed for iPhone and iPad! Just tap and convert any units with its clean interface and user-friendly navigation. Simple swipe actions will allow you to convert quickly and change conversion options easily for additional convenience. Download the fastest & easiest to use converter app today! Conversions from one unit to another unit no longer have to be confusing, simply use Best Unit Converter today. * Features: - Ability To Change Themes - Drag & Set Position Of Units - Add Units To Favorites Section - Restore Category Listing - Enable/Disable Units - Set Decimal Digit Count - Share Converted Units by Email ** Conversion (12 Categories & 140+ Units): - Area  - Length - Energy - Volume - Weight - Power  - Speed  - Time - Number - Temperature  - Data Storage - Fuel Consumption Conversion Calculator is a beautifully designed universal app, designed for both iPhone & iPad. Get the best easy to use metric and units converter for length, number, power, speed, temperature, time, weight, area, energy, and other popular measurement converters tool. Download free. ************************************************************* * Download Conversion Calculator Today! * * Be Sure To Checkout Other Popular Utilities & Games From RV AppStudios! * *************************************************************

Screenshots

Calculator #4 screens
Conversion Calculator Units4 screens

Verdict

The call

Calculator # and Conversion Calculator Units both sit at 4.6 stars, but that hides the real split: 82% of Conversion Calculator Units's written reviews are positive against 60% of Calculator #'s. Calculator #'s advantage is ratings volume (36K vs 5K) and iOS requirement (12.1 vs 15.0). On price, rating, update cadence and ads 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 Conversion Calculator Units 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

On the App Store both sit at effectively the same score — 4.6 for Calculator # against 4.7 for Conversion Calculator Units. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 5K, 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 82% of Conversion Calculator Units's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on September 25, 2026.

Scorecard3 real differences · 7 level
Calculator # versus Conversion Calculator Units: the parameters behind the verdict, then further details
ParameterCalculator #Conversion Calculator Units
PriceFreeFree
Rating4.6 (36K ratings)4.7 (5K ratings) — better
Positive reviews60.0% of reviews82.1% of reviews — better
Number of ratings36K — better5K
Update frequencyEvery 2 monthsEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.0
Further details — not scored
Size57 MB41 MB
Age rating4+4+
DeveloperIncpt.MobisRV AppStudios LLC

Customer experience

Calculator #

All ratings35,876 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews463 reviews
Positive60.0%
Neutral6.5%
Negative33.5%

Conversion Calculator Units

All ratings4,970 ratings
Positive95.7%
Neutral2.5%
Negative1.8%
Written reviews117 reviews
Positive82.1%
Neutral5.1%
Negative12.8%

User reviews

Calculator #

From 36K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Powerful functionality
  • 💡 Helpful for math classes
  • ⭐ Great for students
  • 👌 Works like a real calculator

Room to improve

  • 🔍 Confusing interface after update
  • 📢 Too many intrusive ads
  • 💰 Paywall for advanced features
  • 🐛 Incorrect calculations
  • 🔇 Loud audio ads

Conversion Calculator Units

From 5K App Store ratings

What we love

  • 👍 User-friendly
  • 🚀 Easy to use
  • 💡 Helpful for learning metric system
  • 👍 Great for conversions
  • 👍 Intuitive interface

Room to improve

  • 🐛 Ads disrupt usage
  • 🐛 Difficult to change units
  • 🐛 Lacks portrait mode
  • 🐛 Upside-down orientation issues
  • 🐛 Cluttered UI design

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

Conversion Calculator Units

Reported bugs

2 issues
  • Ads not removed after purchase
  • Incorrect unit conversions

Requested features

4 requests
  • Add pressure conversion units
  • Include a basic calculator function
  • Implement multi-language support
  • Allow customization of unit order

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

Conversion Calculator Units

One-time1
  • Remove Ads$1.99

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Conversion Calculator Units free?
Conversion Calculator Units is free to download, with in-app purchases available.
Which has better reviews, Calculator # or Conversion Calculator Units?
Conversion Calculator Units is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Conversion Calculator Units averages 4.7 from 5K ratings.
Do Calculator # or Conversion Calculator Units have ads?
Both Calculator # and Conversion Calculator Units show ads.
Which is updated more often, Calculator # or Conversion Calculator Units?
Calculator # ships an update every 2 months, and Conversion Calculator Units every 2 months. Most recently, Calculator # was updated on September 25, 2026 and Conversion Calculator Units on September 25, 2026.

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