Comparison

dnCalc vs VRTX

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

VRTX

This tool instantly generates acrostics for any word, perfect for creating unique storytelling routines in magic tricks. It offers easy export options and integrates with other magic applications for advanced functionality.

Highlights
  • Instant acrostic generation
  • Creative storytelling routines
  • Easy export to notes or sharing
  • Seamless API integration with magic apps
  • Dice-controlled acrostic selection
  • Expanded dictionary options
Features
Read full description

------------------------- • WELCOME TO VRTX • ------------------------- Created by Eddy Bouchenak and Guillaume 'GB' Bellut VRTX (pronounced vertex) is an acrostic generator design for magic tricks. ------------------------- Core Features (Included) ------------------------- • Instant Acrostic Generation – Generate an acrostic for any word with a single tap. • Creative Freedom – Use generated words to craft unique storytelling routines. • Easy Export – Save acrostics directly into a note or share them effortlessly. ------------------------- Powerful Add-Ons (Available Separately) ------------------------- • Seamless API Integration – Connect VRTX with other magic apps like Inject, Elips, WikiTest, and more. • Dice-Controlled Acrostics – Manually select a dice value or sync with Kinetic Mental Dice for automatic positioning. • Custom API Output – Export generated acrostics to any app or system of your choice (Glyphs, Voila, Hydra...). • Expanded Dictionaries – Unlock additional word lists to refine and customize your acrostic possibilities. VRTX is part of the new "In The Middle" (ITM) generation of magic apps, acting as a seamless bridge between applications—receiving input from one app, transforming it, and sending it to another. Please note: TV & Internet rights are not included with any of our products.

Screenshots

dnCalc1 screens
VRTX4 screens

Verdict

The call

The clearest difference is in-app purchases: dnCalc at none against VRTX's 10. dnCalc also leads on iOS requirement (11.0 vs 16.6). On price, review sentiment, 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. VRTX sells 10 one-off in-app purchases. dnCalc asks for nothing beyond the download.

UpkeepUpdate frequency

dnCalc ships an update fortnightly, VRTX every 3 weeks. The most recent releases landed on November 11, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
dnCalc versus VRTX: the parameters behind the verdict, then further details
ParameterdnCalcVRTX
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.6
Further details — not scored
Size15 MB99 MB
Age rating4+4+
DeveloperDevious-MonkeyGuillaume Bellut

Customer experience

dnCalc

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

VRTX

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

dnCalc

No in-app purchases

10 purchases

VRTX

One-time10
  • Dizionario delle destinazioniFree
  • Dicionário de DestinoFree
  • Dizionario dei marchi$4.99
Show 7 more
  • Dizionario degli animali$4.99
  • Dizionario degli oggetti$4.99
  • Dicionário de Objetos$4.99
  • Woordenboek van beroemdheden$4.99
  • Dicionário de nomes$4.99
  • Dicionário de celebridades$4.99
  • Full Version$134.99

Questions

Is dnCalc free?
dnCalc is free to download, with no in-app purchases.
Is VRTX free?
VRTX is free to download, with in-app purchases available.
Do dnCalc or VRTX have ads?
Neither dnCalc nor VRTX shows ads.
Which is updated more often, dnCalc or VRTX?
dnCalc ships an update fortnightly, and VRTX every 3 weeks. Most recently, dnCalc was updated on November 11, 2026 and VRTX on October 30, 2026.

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