Galaxy3D vs dnCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Galaxy3D
Relive classic arcade space shooter experiences in a 3D environment. Pilot your ship, destroy waves of alien enemies, and survive the onslaught. Simple tap and slide controls make for intuitive gameplay.
- 3D arcade space shooter
- Classic gameplay revival
- Destroy alien waves
- Simple tap and slide controls
- Single missile on screen
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First of All!!! Controls: - Slide LEFT/RIGHT to move Left/Right your ship. - Tap to Fire. Do you like the classics? How much money have you spent in the arcade games? Want to relive the past? Galaxy3DHD takes you to the past, relive your first arcade play of your life in 3D. Your mission destroy all Aliens, try to survive of enemy ships waves. Be careful you can only have one missile on the screen. Please Enjoy!!
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
Screenshots
Verdict
The clearest difference is price: dnCalc at Free against Galaxy3D's $1.99. dnCalc also leads on update cadence (fortnightly vs every 38 months) and iOS requirement (11.0 vs 14.0). On review sentiment, 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
dnCalc is free to download; Galaxy3D costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Galaxy3D ships an update every 38 months, dnCalc fortnightly. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.
| Parameter | Galaxy3D | dnCalc |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 38 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Ivan Cerra de Castro | Devious-Monkey |
Customer experience
Galaxy3D
dnCalc
In-app purchases
Galaxy3D
No in-app purchases
dnCalc
No in-app purchases
