Comparison

Convex Programmer's Calculator vs Calendar Clock

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

Head to head
About

Convex Programmer's Calculator

Convert numbers between hexadecimal, decimal, octal, and binary. Perform byte flips, bit shifts, and calculate two's complement. Features bit indicators and word grouping for improved binary readability.

Highlights
  • Number base conversion
  • Two's complement calculation
  • Byte flipping for endianness
  • Left and right bit shifting
  • Binary readability enhancements
  • Copy, paste, and clear functionality
Features
Read full description

Easily convert between hexadecimal, decimal, octal, and binary. Calculate the two's complement of any number. Flip a number's bytes to switch its endianness. Bit-shift left and right. Bit indicators and word grouping make binary easier to read. Tap the number to copy, paste, and clear. Swipe left or right on the number to backspace.

About

Calendar Clock

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

Highlights
  • All-in-one screen display
  • Year, month, week, day, hour, minute, second
  • Switchable theme colors (dark, light, green, blue)
  • Disables device sleep mode
  • Acts as a desk clock
Features
Read full description

Time and date, beautifully together. Calendar Clock is a simple, elegant time-and-calendar app designed for iPhone and iPad. See the current time and the entire month at a glance, with a clean interface that stays out of your way. Features * Large digital clock — View the current system time clearly and instantly. * 24-hour or 12-hour format — Swipe across the clock to switch between 24-hour and AM/PM formats. * Monthly calendar — See the full month with the current year and month displayed above it. * Swipe through months — Swipe left or right on the calendar to move between months. * Today at a glance — Today's date is highlighted with a red circle. * Weekend highlighting — Saturdays and Sundays are displayed in red. * Multiple themes — Swipe up or down to change the screen theme. * Remembers your preferences — Your selected clock format and theme are preserved. * iPhone & iPad — Designed for both iPhone and iPad. Simple by design No complicated menus. No unnecessary controls. Just the time and the calendar, exactly when you need them. Calendar Clock — See time. See your day. Note that this application disables your device's sleep mode while running, so make sure you have enough battery life. *Important notice: Use the information recoded or functionality provided in / or generated with this application only as a rough indication, rough estimates or as a rough guide. Even though we do our best to provide you with confirmed information and tried-and-tested features, the accuracy and successful operation and performance of the application are NOT GUARANTEED by us. Users are strongly advised to confirm the information of their interest with other sources and not to ultimately rely on functionality and performance of this application. This application is provided “as is” and with all faults. You bear the risk of using it. We shall not be responsible or liable for any loss or damage of any kind incurred as a result of the use of functions or the content of this application. By using this application you are agreeing to these terms. If you do not agree to these terms do not use this application.

Screenshots

Convex Programmer's Calculator4 screens
Calendar Clock4 screens

Verdict

The call

The clearest difference is review sentiment: Convex Programmer's Calculator at 67% against Calendar Clock's 0%. Convex Programmer's Calculator also leads on price (Free vs $0.99) and update cadence (every 8 months vs every 41 months). On 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

CostPrice · In-app purchases · Ads · Monetization

Convex Programmer's Calculator is free to download; Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Convex Programmer's Calculator ships an update every 8 months, Calendar Clock every 41 months. The most recent releases landed on June 11, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
Convex Programmer's Calculator versus Calendar Clock: the parameters behind the verdict, then further details
ParameterConvex Programmer's CalculatorCalendar Clock
PriceFree — better$0.99
Rating4.7 (6 ratings) — better—
Positive reviews66.7% of reviews — better0.0% of reviews
Number of ratings6 — better—
Update frequencyEvery 8 months — betterEvery 41 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better26.5
Further details — not scored
Size0 MB4 MB
Age rating4+4+
DeveloperMatthew DaigleSystemiko Inc.

Customer experience

Convex Programmer's Calculator

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

Calendar Clock

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Convex Programmer's Calculator

No in-app purchases

None

Calendar Clock

No in-app purchases

Questions

Is Convex Programmer's Calculator free?
Convex Programmer's Calculator is free to download, with no in-app purchases.
Is Calendar Clock free?
Calendar Clock costs $0.99, with no in-app purchases.
Do Convex Programmer's Calculator or Calendar Clock have ads?
Neither Convex Programmer's Calculator nor Calendar Clock shows ads.
Which is updated more often, Convex Programmer's Calculator or Calendar Clock?
Convex Programmer's Calculator ships an update every 8 months, and Calendar Clock every 41 months. Most recently, Convex Programmer's Calculator was updated on June 11, 2026 and Calendar Clock on September 10, 2026.

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