Calculator HD for iPad. vs Duodecuple Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator HD for iPad.
This app provides a powerful and beautifully designed calculator experience for your iPad. It offers both basic and scientific functions, with customizable skins and a history log for your calculations. Enjoy a familiar interface with enhanced features.
- Live voice calculator
- Basic and scientific modes
- Calculation history
- Customizable skins
- Display of calculation steps
- Dark Mode support
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***** The No.1 iPad Calculator ***** This imitation of the original iPhone calculator lets you have the same calculator on both your iPad and iPhone, FEATURES: * Live voice calculator * Basic calculation function in portrait view * Scientific mode in landscape view * Two meticulously-produced skins * Keyboard layout that changes with usage frequency * Super-sized "+" key for ease of use * Display of calculation steps * Beautiful design * Full support for Retina display * Work same as original calculator * More functions soon to be announced * Support Dark Mode Are you worried that the iPad doesn't come with a calculator? Concerned that free replacement products are ugly? Then hurry up and download our beautifully designed iPad calculator. This is just the beginning: in later releases we will continue to add new functions. Don't forget to rate us! Development Plan * Backspace button (already added) * More beautiful interface (addition of another skin) * Calculation history (already added) * Even more functions This is the BEST iPad calculator you can not miss. Calculator... URL scheme is "EWCalculator://"
Duodecuple Calc
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Display 12 calculators and perform calculations with each one.
Screenshots
Verdict
The clearest difference is in-app purchases: Duodecuple Calc at none against Calculator HD for iPad.'s 1. Duodecuple Calc also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). Calculator HD for iPad.'s advantage is iOS requirement (13.0 vs 15.8.3). On price 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
Both are free to download. Calculator HD for iPad. sells 1 one-off in-app purchase. Duodecuple Calc asks for nothing beyond the download.
Calculator HD for iPad. ships an update every 2 months, Duodecuple Calc every 2 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Calculator HD for iPad. | Duodecuple Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (41 ratings) — better | — |
| Positive reviews | 83.4% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 100 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | 良峰 侯 | Hideaki Uchikoshi |
Bugs and requests
Calculator HD for iPad.
Reported bugs
8 issues- App crashes after update
- Calculation errors (e.g., 3^2 - 2^2 = 49, 2^4=4)
- Ad banner is intrusive and distracting
- Paid app still shows ads
- Slow to open/load
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- App crashes on iPad 1
- Language not as described (German missing)
- Missing algebraic functions
Requested features
6 requests- Remove ad banner
- Add German language support
- Improve calculation accuracy for complex functions
- Make an ad-free version available
- Add Binary, Octal, Decimal, and Hexadecimal interconversions
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- Update for iOS 7
Duodecuple Calc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator HD for iPad.
- Remove Ads$1.99
Duodecuple Calc
No in-app purchases
Questions
Is Calculator HD for iPad. free?
Is Duodecuple Calc free?
Do Calculator HD for iPad. or Duodecuple Calc have ads?
Which is updated more often, Calculator HD for iPad. or Duodecuple Calc?
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