Comparison

Modulo Calculator. vs Dual

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

Head to head
About

Modulo Calculator.

Features
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The Modulo Calculator app lets you calculate the modulo of two numbers. Modulo operation is the remainder after division of one number by another. This is often needed by programmers and computer scientists. • Short form of Modulo operation is mod and the symbol is %. • Support for exponential notation (^ power) • Support for calculations including: inverse (^-1), addition, subtraction, multiplication and division • Support for decimal numbers • See how the modulo operation result differs between different modulo definitions used by programming languages • Supported modulo definitions: Euclidean Modulo, Truncated Modulo and Floored Modulo • See how many times the second number fits in the first one • Lets you copy the result to your clipboard • Light and dark mode

About

Dual

This cognitive training game is designed to enhance working memory through a simple yet challenging experience. It offers a clean interface with detailed history tracking and customizable gameplay and aesthetics. All data is stored locally for enhanced privacy.

Highlights
  • Working memory improvement
  • Detailed game history
  • Replay previous rounds
  • Gameplay customization
  • Aesthetic customization
  • Local data storage
Features
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Welcome to Dual-N-Back, a cognitive game scientifically proven to improve working memory. The game is fairly simple to learn, but it can get quite challenging as you get to higher levels. The philosophy of this app is to provide a clean and minimalistic interface for the game Dual-N-Back, whilst providing additional functionality to help users improve as fast as possible and understand their tendencies. Some Features Include: - Game history, with full information on your Correct answers, Misses and False Alarms. - Trial history, for the games that you have recently played. You will be able to view the squares that showed up, as well as which letters were said. You can also view which buttons you pressed to see where you went wrong. - Replay round, allowing you to play a round you previously played, with the same squares on the grid, with the same letters which were said. - Gameplay customisations, such as quadratic or linear trial numbers, trial duration, automatic N-level adjustments. - Aesthetic customisations, such as light or dark mode, and accent colours. - Note: this application does not make any connections to external servers, and all your information will be kept locally for privacy sake. It will not make any notifications and has zero advertisements and subscription based services.

Screenshots

Modulo Calculator.4 screens
Dual4 screens

Verdict

The call

The clearest difference is price: Modulo Calculator. at Free against Dual's $0.99. Modulo Calculator. also leads on iOS requirement (12.0 vs 16.6). Dual's advantage is ads (none vs shown) and update cadence (every 2 days vs every 4 months). On in-app purchases 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

Modulo Calculator. is free to download; Dual costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Modulo Calculator. ships an update every 4 months, Dual every 2 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
Modulo Calculator. versus Dual: the parameters behind the verdict, then further details
ParameterModulo Calculator.Dual
PriceFree — better$0.99
Rating—4.8 (4 ratings) — better
Positive reviews—90.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 4 monthsEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.6
Further details — not scored
Size29 MB1 MB
Age rating4+4+
DeveloperMilos Lukas ZiolkowskiAndrew Tang

In-app purchases

None

Modulo Calculator.

No in-app purchases

None

Dual

No in-app purchases

Questions

Is Modulo Calculator. free?
Modulo Calculator. is free to download, with no in-app purchases.
Is Dual free?
Dual costs $0.99, with no in-app purchases.
Do Modulo Calculator. or Dual have ads?
Modulo Calculator. shows ads; Dual does not.
Which is updated more often, Modulo Calculator. or Dual?
Modulo Calculator. ships an update every 4 months, and Dual every 2 days. Most recently, Modulo Calculator. was updated on October 9, 2026 and Dual on October 7, 2026.

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