Comparison

Hacker Clock vs Calculator HD (for iPad)

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hacker Clock

Transform your device into a unique clock displaying animated hexadecimal code. Watch green hexadecimal values flow across the screen, simulating complex data processing. Ideal for computer enthusiasts, hackers, and fans of futuristic aesthetics.

Highlights
  • Animated hexadecimal code display
  • Three color variants (green, red, blue)
  • Horizontal and vertical display modes
  • 12- and 24-hour format options
  • Unique clock for geeks and fans
Features
Read full description

Hacker Clock turns your iPhone into a truly unique clock displayed as animated hexadecimal code. The green hexadecimal values constantly move across the screen, making it look as if your phone is processing complex data. This application is perfect for computer geeks, hackers, and matrix fans. If you are using a binary clock, you can throw it away. Once you try this hexadecimal clock, you will never want to use any other. Summary: * A truly unique clock * Animated hexadecimal code * Three color variants: green, red, blue * Horizontal and vertical modes * 12- and 24-hour formats

About

Calculator HD (for iPad)

This app offers a powerful and intuitive calculator experience optimized for larger screens. It features both basic and scientific modes, with convenient multitasking capabilities like Split Screen support and easy copy-pasting of results.

Highlights
  • Split Screen and Side Over support
  • Swipe to delete input errors
  • Copy and paste calculation results
  • Vertical basic mode
  • Horizontal scientific mode
  • Optimized for iOS
Features
Read full description

Proudly presenting the grand release of "Calculator HD" version 4.0! Support for Split Screen is finally here! In this brand-new version, you can enjoy more convenient operations through Split Screen and Side Over. You can delete accidental input errors by swiping left or right, and you can also copy calculation results or paste calculation data between different apps. There are countless calculator products on the app market, but none achieve such perfection. Optimized for the latest version of iOS, "Calculator HD" brings you a perfect blend of simplicity and ease of use like never before. In the vertical basic mode, you will never accidentally press those large, finger-friendly keys; while the horizontal scientific mode provides you with all the functions you need for your daily calculations—those functions you will actually use, not just decorative embellishments. "Calculator HD" is the perfect replacement for the iPhone calculator, only bigger, clearer, and easier to use. You don't need to spend any time learning how to use it because you are already very familiar with its operation. Happy calculating!

Screenshots

Hacker Clock2 screens

Verdict

The call

The clearest difference is price: Hacker Clock at Free against Calculator HD (for iPad)'s $1.99. Hacker Clock also leads on device support (3 vs 1) and iOS requirement (12.0 vs 14.0). Calculator HD (for iPad)'s advantage is update cadence (fortnightly vs every 15 months) and review sentiment (63% vs 54%). On rating, ratings volume, ads and in-app purchases 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

Hacker Clock is free to download; Calculator HD (for iPad) costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calculator HD (for iPad) holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 42 and 26 respectively. Written reviews point the same way: 54% of Hacker Clock's written reviews are positive against 63% of Calculator HD (for iPad)'s.

UpkeepUpdate frequency

Hacker Clock ships an update every 15 months, Calculator HD (for iPad) fortnightly. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
Hacker Clock versus Calculator HD (for iPad): the parameters behind the verdict, then further details
ParameterHacker ClockCalculator HD (for iPad)
PriceFree — better$1.99
Rating4.5 (42 ratings)4.7 (26 ratings) — better
Positive reviews53.8% of reviews63.3% of reviews — better
Number of ratings42 — better26
Update frequencyEvery 15 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS12.0 — better14.0
Further details — not scored
Size12 MB2 MB
Age rating4+4+
DeveloperLeszek Szary帅 刘

Customer experience

Hacker Clock

All ratings41 ratings
Positive82.9%
Neutral9.8%
Negative7.3%
Written reviews26 reviews
Positive53.8%
Neutral11.5%
Negative34.6%

Calculator HD (for iPad)

All ratings26 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews147 reviews
Positive63.3%
Neutral8.2%
Negative28.6%

In-app purchases

None

Hacker Clock

No in-app purchases

None

Calculator HD (for iPad)

No in-app purchases

Questions

Is Hacker Clock free?
Hacker Clock is free to download, with no in-app purchases.
Is Calculator HD (for iPad) free?
Calculator HD (for iPad) costs $1.99, with no in-app purchases.
Which has better reviews, Hacker Clock or Calculator HD (for iPad)?
Calculator HD (for iPad) is rated higher. Hacker Clock averages 4.5 out of 5 from 42 ratings, while Calculator HD (for iPad) averages 4.7 from 26 ratings.
Do Hacker Clock or Calculator HD (for iPad) have ads?
Neither Hacker Clock nor Calculator HD (for iPad) shows ads.
Which is updated more often, Hacker Clock or Calculator HD (for iPad)?
Hacker Clock ships an update every 15 months, and Calculator HD (for iPad) fortnightly. Most recently, Hacker Clock was updated on October 29, 2026 and Calculator HD (for iPad) on October 20, 2026.

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