Comparison

dnCalc vs Forcing Matrix

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

Head to head
About

dnCalc

Perform amazing mathematical "experiences" to impress friends and colleagues. This app allows you to reveal secret numbers, ages, zodiac signs, and more, all without touching a calculator. It's easy to use, requires no memorization, and can be done with your eyes closed.

Highlights
  • Reveal secret numbers
  • Peek at ages and zodiac signs
  • Calculate birth day of week
  • Create custom formulas
  • Works offline
  • Up to 5 participants
Features
Read full description

Imagine... You are enjoying a lunch with friends and you suggest to perform a strange mathematical "experience". You ask for several volunteers to think of a special number, a birthday, the age of their best friend... You then ask them to multiply these numbers together, without you being able to see anything, then multiply the result by a special number that you previously wrote on a piece of paper, before the demonstration begins. Your friends give you orally the final result of these operations. You close your eyes and after a few seconds you reveal in the right order, the secret numbers of your friends! dnCalc will allow you to easily produce this little miracle that you can adapt according to your wishes and to he context. Your friends or colleagues will be asking what magical mathematical operation you mentally do to "extract" their numbers. Guaranteed to impress! • Very easy to do. A PDF document explains in details the procedure (which you can adapt). • Nothing to memorize. • Up to 5 people can be involved in the demonstration. • The spectators manipulate the calculator, you do not touch anything. • You can do this demonstration with your eyes closed. • No need for internet connection. • The trick is absolutely undetectable, nothing to find. • The effect is reproducible several times in a row. Many other cool features : • Force any number you need. • Compute and peek the age of your volunteer. • Compute and peek his zodiac signs (classic or Chinese). • Compute and peek his birth day of week. • Build your own forcing/peeking formulas! *** IMPORTANT *** If you have questions, do not ask them in the app's reviews, in order to preserve the secret. Send an email to dnCalc@moult.org. Thank you ! Alistair Crompton

About

Forcing Matrix

This application assists professional magicians in creating forcing matrices for their performances. It functions as a digital tool to construct these matrices, rather than a teaching resource. The app operates offline, providing the same algorithm as its online counterpart.

Highlights
  • Create forcing matrices
  • Offline functionality
  • Same algorithm as online version
  • Digital construction tool
  • Assists professional magicians
Features
Read full description

This is Forcing Matrix Magic helper for professional magicians. Forcing Matrix is quite old principle which is nicely described on deceptionary website. This app should help you to create forcing matrixes on the go. Please note this will not teach you how to use forcing matrix - this is just a helper to construct the matrix itself! You can play with the online interactive version here: https://bit.ly/3ppOrDo You may be surprised to learn the result you gonna select is 666! The algorithm in this app is exactly the same as the one online version is using. Of course nobody is forcing you to buy this app - you can keep happily using the website. This has been developed for those who were complaining about not being online all the time. This application doesn't need internet connection to do the calculations!

Screenshots

dnCalc1 screens
Forcing Matrix2 screens

Verdict

The call

The clearest difference is price: dnCalc at Free against Forcing Matrix's $3.99. dnCalc also leads on update cadence (fortnightly vs every 25 months) and iOS requirement (11.0 vs 15.0). On ads, 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

dnCalc is free to download; Forcing Matrix costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

dnCalc ships an update fortnightly, Forcing Matrix every 25 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 6 level
dnCalc versus Forcing Matrix: the parameters behind the verdict, then further details
ParameterdnCalcForcing Matrix
PriceFree — better$3.99
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 25 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size15 MB0 MB
Age rating4+4+
DeveloperDevious-MonkeyTomas Jelinek

Customer experience

dnCalc

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Forcing Matrix

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

dnCalc

No in-app purchases

None

Forcing Matrix

No in-app purchases

Questions

Is dnCalc free?
dnCalc is free to download, with no in-app purchases.
Is Forcing Matrix free?
Forcing Matrix costs $3.99, with no in-app purchases.
Do dnCalc or Forcing Matrix have ads?
Neither dnCalc nor Forcing Matrix shows ads.
Which is updated more often, dnCalc or Forcing Matrix?
dnCalc ships an update fortnightly, and Forcing Matrix every 25 months. Most recently, dnCalc was updated on October 13, 2026 and Forcing Matrix on October 4, 2026.

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