Comparison

Calc Pro vs DozClock

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

Head to head
About

Calc Pro

This powerful calculator handles complex equations and huge numbers with up to 15 digits of precision. It saves your calculation history, allowing you to reuse previous equations and answers. Access scientific functions like square root and logarithms easily with a swipe.

Highlights
  • Complex calculations
  • Huge number handling
  • Calculation history
  • Scientific functions
  • Dark Mode
  • Copy answer
Features
Read full description

Calc Pro can do complicated calculations easily. It is a very powerful math calculator but easy to use. Calc Pro also handles huge numbers without ellipsis. Most calculators will only handle calculations involving numbers with up to 13 digits, but this one allows for larger and more precise calculations, supporting up to 15 digits of precision to the right of the decimal, and big enough digits to the left. Calculation history won't be lost when the app is closed. You can reuse calculation equations and answers by tapping. Calc Pro also supports mathematical functions like square root, logarithm, combinations, and permutation. You can easily access these functions by swiping. Features: - Arithmetic - Calculation with parentheses - Dark Mode - Huge Number Handling - Copy calc answer with a long press - Calculation history - Scientific calculation - Swipe to change the keyboard easily

About

DozClock

Features
Read full description

The Dozenal Suite is a set of six apps of dozenal utilities. They run on Apple’s mobiles (with iOS 18 or higher). On any timing device, the day is divided by successive powers of 12, providing metric time reckoning based on twelves rather than tens. The leftmost digit changes every 2 hours (1/12 day), the next digit every 10 minutes, the next every 50 seconds. If displayed, the fourth digit changes every 4 1/6 seconds and the fifth digit every 25/72 second. That's much simpler and easier than the current time reckoning, which uses a mixture of bases 10, 12, 2, and 60. In the dozenal number base, because the number 10 is one dozen, numerals ten and eleven must be single digits. They are represented by the symbols invented long ago by Isaac Pitman: rotated 2 for ten, and rotated 3 for eleven. Those are used by the two major dozenal societies, the Dozenal Society of America and the Dozenal Society of Great Britain. In plain text with dozenal numbers, ten is designated by the letter A, and eleven by the letter B. On either or both of the lock screen and home screen, the DozClock widget displays diurnal time. In the app you choose to start the clock at local midnight or at 6 AM, and for the home screen, to display either three or four digits. The calendar displays the date format yyyy-mm-dd. In the app you choose the traditional calendar or the Holocene. If you start the clock at 6 AM, the times between midnight and 5:59:59 AM are a different color, as a reminder that traditional time reckoning has started a new date.

Screenshots

Calc Pro4 screens
DozClock3 screens

Verdict

The call

The clearest difference is ads: DozClock at none against Calc Pro's shown. DozClock also leads on update cadence (every 2 weeks vs monthly). On price, in-app purchases, device support and iOS requirement 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

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

UpkeepUpdate frequency

Calc Pro ships an update monthly, DozClock every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Calc Pro versus DozClock: the parameters behind the verdict, then further details
ParameterCalc ProDozClock
PriceFreeFree
Rating4.8 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyMonthlyEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.018.0
Further details — not scored
Size8 MB1 MB
Age rating4+4+
DeveloperKeita NonakaPaul Rapoport

In-app purchases

None

Calc Pro

No in-app purchases

None

DozClock

No in-app purchases

Questions

Is Calc Pro free?
Calc Pro is free to download, with no in-app purchases.
Is DozClock free?
DozClock is free to download, with no in-app purchases.
Do Calc Pro or DozClock have ads?
Calc Pro shows ads; DozClock does not.
Which is updated more often, Calc Pro or DozClock?
Calc Pro ships an update monthly, and DozClock every 2 weeks. Most recently, Calc Pro was updated on October 24, 2026 and DozClock on October 25, 2026.

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