# dnCalc vs Ultra Sharpie | Pen Magic App

The clearest difference is iOS requirement: dnCalc at 11.0 against Ultra Sharpie | Pen Magic App's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

dnCalc ships an update fortnightly, Ultra Sharpie | Pen Magic App every 4 weeks. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | dnCalc | Ultra Sharpie | Pen Magic App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | Free | — |
| Size | 15 MB | 44 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Devious-Monkey](https://appshunter.io/developer/388388527) | [Javier Franco](https://appshunter.io/developer/1742355282) |

## What reviewers say

### dnCalc

[App page](https://appshunter.io/ios/app/dncalc/id1309683648)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Ultra Sharpie | Pen Magic App

[App page](https://appshunter.io/ios/app/ultra-sharpie-pen-magic-app/id6499077337)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is dnCalc free?

dnCalc is free to download, with no in-app purchases.

### Is Ultra Sharpie | Pen Magic App free?

Ultra Sharpie | Pen Magic App is free to download, with no in-app purchases.

### Do dnCalc or Ultra Sharpie | Pen Magic App have ads?

Neither dnCalc nor Ultra Sharpie | Pen Magic App shows ads.

### Which is updated more often, dnCalc or Ultra Sharpie | Pen Magic App?

dnCalc ships an update fortnightly, and Ultra Sharpie | Pen Magic App every 4 weeks. Most recently, dnCalc was updated on October 13, 2026 and Ultra Sharpie | Pen Magic App on October 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*