dnCalc vs All Seeing Eye
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Reveal secret numbers
- Peek at ages and zodiac signs
- Calculate birth day of week
- Create custom formulas
- Works offline
- Up to 5 participants
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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
All Seeing Eye
This app allows you to perform magic tricks by secretly revealing words thought of by spectators. It uses a sophisticated anagram engine and offers various methods for inputting word lists and revealing the word discreetly.
- Secretly reveals spectator-thought-of words
- Anagram engine for word deduction
- Multiple word list input methods
- Various anagram strategies
- Discreet word reveal options
- Integration with other apps
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All Seeing Eye — they think of a word, and you name it. A spectator merely thinks of a word. You ask a few natural yes/no questions about its letters, and the app's anagram engine quietly narrows the field to a single word — then hands it to you in secret. Nothing for them to see, nothing to install, nothing to connect. Just you, your phone, and what looks like genuine mind reading. If you want to try out All Seeing Eye, there is now a FREE sneak peek, where you can see how it easy it is to perform and divine a star sign! Built for working magicians and mentalists, All Seeing Eye is effortless out of the box and endlessly flexible underneath. SIMPLE TO PERFORM Ask "yes or no," tap the answer, repeat. The engine does the thinking and reveals the word the instant it's certain. That's the whole method — no memory work, no math. FEED IT WORDS FROM ANYWHERE Nine ways to build your word pool: • Type your own list, or pull from Notes or the clipboard • Import vocabulary.com lists — star favorites and set a default • Scrape a saved website, a Wikipedia article (WikiTest), or a Google result (Inject) • Point it at any JSON endpoint (Custom API) • Look words up by page and line from your Book Test Library CHOOSE YOUR EFFECT Different anagram strategies change how the trick plays: • Progressive — mostly "yes" answers for a confident, building reveal • Transgressive — a true binary search that finds the word in the fewest questions • Random — a genuinely arbitrary path that never looks systematic • Commutative — the same scripted questions every single time • Groupings — reveal letters in groups (the Ascrabbological approach, thanks to The Jerx for allowing us to include this) Instant "Classic" types never fail and need no loading. Tree-search flavors plan the whole sequence ahead, with automatic fallback so a show never stalls. PEEK HOWEVER YOU PERFORM Read the word the way that fits the moment: • On your iPhone screen • On your Apple Watch — a glance at your wrist, completely hands-free • On a PeekSmith wireless display • Spoken into a wireless earpiece • Hidden under Touch to Peek, or disguised behind your own photo with Camouflage Mode SEND IT ONWARD Long-press the revealed word to fire it to the ThoughtCast Actions app — drive a printed prediction, a confabulation, or any automation you've built. YOURS TO OWN All the base features in a one-time unlock. Activate with your ThoughtCast account or unlock right inside the app. TRY IT OUT, ON US Try performing with All Seeing Eye using our basic star sign list, then upgrade for all the features! They think of a word. You name it. That's All Seeing Eye. This app is for entertainment purposes only.
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Verdict
The clearest difference is in-app purchases: dnCalc at none against All Seeing Eye's 1. dnCalc also leads on iOS requirement (11.0 vs 18.0). All Seeing Eye's advantage is update cadence (every 6 days vs fortnightly). On price, ads 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
Both are free to download. All Seeing Eye sells 1 one-off in-app purchase. dnCalc asks for nothing beyond the download.
dnCalc ships an update fortnightly, All Seeing Eye every 6 days. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.
| Parameter | dnCalc | All Seeing Eye |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Fortnightly | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 15 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | Devious-Monkey | AndEtc, Inc. |
In-app purchases
dnCalc
No in-app purchases
All Seeing Eye
- Base App Unlock$399.99









