Comparison

Function Calc vs Duel Connect

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

Head to head
About

Function Calc

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

Highlights
  • Programmable custom functions
  • Graphing capabilities
  • Tape display with edit/undo
  • Unit conversions (120+)
  • Dictate calculations
  • Export graphs (PDF, PNG)
Features
Read full description

A full-function, programmable, graphing scientific calculator designed to be very quick and easy to use, but with the added power of customisation. Tape display is visible while you type, and a swipe away from full screen view. Select and directly input any number from tape, undo or edit calculations. Easily create and use custom functions, store equations and useful numbers, use complex functions with multiple variables - fully programmable. Plot functions on a zoomable graph, export a high-resolution pdf copy. Dictate calculations and numbers for statistical analysis, with instant results. Completely free. • no adverts, no in-app purchases. • full set of scientific functions, unlimited nested brackets. • swipe to undo, step by step. • easily edit calculations and re-calculate. • optionally enter and edit calculations in standard maths format, rather than calculator order. • visible memory store. • tape output shows all calculations – swipe for full screen. • never type the same number twice – direct input from tape. • instantly convert between more than 120 different units. • zoomable text for easy reading and editing. • fully editable useful numbers page – store constants, conversion factors, commonly used numbers, tappable URLs or email addresses, or any text. • create, store and use functions for unit conversions or calculations, as simple as copy and paste. • dictate calculations, or lists of numbers for statistical analysis, get instant results. • create, edit and use complex functions with up to ten inputs or outputs – solve quadratic and cubic equations, calculate mortgage payments, compound interest, body mass index, triangles, the day of the week for any date, sunrise and sunset times and direction for any date and place, statistics (including normal, Student's T, Chi Square and F cumulative probability functions) and more – create or keep exactly what is useful, edit or delete what isn’t. 50 functions included. • fully zoomable graphing capability, plot one or two functions on a graph. Export PNG or high-resolution large pdf copies. • ideal for complex or repetitive tasks – custom functions reduce errors. • full help included.

About

Duel Connect

Track life points for card games with a stylish and customizable interface. Offers multiple input methods, duel history, and performance statistics with graphs. Includes dice and coin simulators for added functionality.

Highlights
  • Life points counter
  • Multiple input methods (keyboard, gesture)
  • Duel history and statistics
  • Dice and coin simulator
  • Customizable design and backgrounds
  • QR code opponent scanning
Features
Read full description

Need a simple yet stylish app to count your life points during a Yu-Gi-Oh duel? Then Duel Connect is just what you are looking for! Not only does the app offer you an innovative design with several personalization options, but it also saves all your duel results so that you can later admire your performance in various graphs and tables. Just scan your opponent's QR code and let the duel begin! What will you experience in Duel Connect? - Fight heated duels - Personalize your life points input - Dice and coin simulator - Simple and efficient design - View your statistics and performance against other users - Start your duels with as many Life Points as you like - Sound and Design as known from the anime - an excellent life points counter - choose an epic background image for your Life Points Counter --------------------------------------- Customize your duel input mode In Duel Connect you can decide which input form you prefer! Are you the classic type who enters your life point changes via a keyboard or do you prefer the smart gesture control? This life points counter offers you the following possibilities: --> Keyboard - The classic way. You simply enter your health changes using a calculator keyboard. --> Text field - use buttons to decide about the content of each text field. Each digit of the number has its own text field. Sounds complicated - but is extremely intuitive and fast to use. --> Buttons - there are a number of buttons available for you to quickly add life points to the current value and finally you perform the change of life points with a single floating button. --> Gesture control - elegant and efficient. Control your health with simple finger movements, or tap the top and bottom of the screen to increase or decrease your health. Track your duel performance Now it's getting really exciting. How have you performed in your duels so far? Against which opponents do you usually perform badly or well? Use the statistics to analyze your duel performance and that of your decks in more detail. Maybe you'll notice some good opportunities for improvement that will help you take your skills and your deck to the next level. Don't set limits to your creativity! Enjoy your duel log Looking for that one legendary duel you had with your friend and want to retrace the process? Duel Connect not only gives you access to all your duels, but also to precise log data of your duels, so you can always track how they went. Download now and show the others that YOU are the king of games!

Screenshots

Function Calc4 screens
Duel Connect4 screens

Verdict

The call

The clearest difference is rating: Function Calc at 5.0 against Duel Connect's 3.7. Function Calc also leads on in-app purchases (none vs 1) and ads (none vs shown). Duel Connect's advantage is review sentiment (100% vs 80%) and iOS requirement (13.0 vs 18.6). On price, ratings volume 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. Duel Connect sells 1 one-off in-app purchase. Function Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Function Calc holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 80% of Function Calc's written reviews are positive against 100% of Duel Connect's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Function Calc ships an update monthly, Duel Connect every 2 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

Scorecard7 real differences · 3 level
Function Calc versus Duel Connect: the parameters behind the verdict, then further details
ParameterFunction CalcDuel Connect
PriceFreeFree
Rating5.0 (3 ratings) — better3.7 (3 ratings)
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings33
Update frequencyMonthly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS18.613.0 — better
Further details — not scored
Size5 MB155 MB
Age rating4+4+
DeveloperHugh PelhamMaximilian Hemme

Customer experience

Function Calc

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Duel Connect

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Function Calc

No in-app purchases

1 purchases

Duel Connect

One-time1
  • Alle Hintergründe freischalten$1.99

Questions

Is Function Calc free?
Function Calc is free to download, with no in-app purchases.
Is Duel Connect free?
Duel Connect is free to download, with in-app purchases available.
Which has better reviews, Function Calc or Duel Connect?
Function Calc is rated higher. Function Calc averages 5.0 out of 5 from 3 ratings, while Duel Connect averages 3.7 from 3 ratings.
Do Function Calc or Duel Connect have ads?
Duel Connect shows ads; Function Calc does not.
Which is updated more often, Function Calc or Duel Connect?
Function Calc ships an update monthly, and Duel Connect every 2 months. Most recently, Function Calc was updated on September 23, 2026 and Duel Connect on September 19, 2026.

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