# Convex Programmer's Calculator vs Calendar Clock

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.

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.

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.

## The numbers

| Metric | Convex Programmer's Calculator | Calendar Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/convex-programmers-calculator/id1021414602/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 41 months |
| Monetization | **Free** | Paid |
| Size | 0 MB | 4 MB |
| Requires iOS | **16.0** | 26.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Matthew Daigle](https://appshunter.io/developer/1021414601) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## What reviewers say

### Convex Programmer's Calculator

[App page](https://appshunter.io/ios/app/convex-programmers-calculator/id1021414602)

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:** macOS Compatibility

**In-app purchases:** none


### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

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:** macOS Compatibility

**In-app purchases:** none


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