HexaCalc vs Protern Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HexaCalc
This free utility app provides seamless number system conversions between hexadecimal, binary, and decimal. It offers a clean, customizable interface with full calculation history and supports essential arithmetic and bitwise operations.
- Hexadecimal, binary, and decimal conversions
- Full calculation history
- Customizable interface and app icon
- Arithmetic and bitwise operations
- Tabbed interface for focused use
- Multitasking and Slide Over support
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The best programmer’s calculator on the App Store made for students and professionals in the computer field. Completely free without ads of any kind, easy to use, fully customizable and beautiful, this app is sure to impress! HexaCalc will fulfill all of your conversion and calculation needs between the hexadecimal, binary and decimal number systems. This app was designed to work seamlessly on both iPhones and iPads including multitasking and Slide Over support for iPads. HexaCalc also includes full calculation history for all calculators, allowing you to view past calculations. Click on any of the past calculations to copy the result to your clipboard which will let you paste it in for the next calculation! What sets HexaCalc apart from other calculators on the App Store is its simplicity and design. With a designated tab for each number system and the option to disable the binary or decimal tabs, users can focus on the functionalities they desire instead of being overwhelmed with extra information. Even with separate tabs, conversion between the number systems remains as simple as ever. Simply type a number into one of the number system tabs and switch tabs to another number system - you will see the same number converted! HexaCalc also offers seamless customization beyond any similar app - switch between 8 system colours with just a tap - even the app icon will change to your selected colour! It is also easy to disable unwanted tabs and all customizations will be saved for all future usage of the app. List of Operations • Addition, subtraction, multiplication, division • AND, OR, XOR, NOT • 1's compliment, 2's compliment, left shift, right shift • Modulus, exponentiation, square root This app supports all iPhones with iOS 13+ and all iPads with iPadOS 13+. Privacy Policy: https://anthony55hopkins.wixsite.com/hexacalc/privacy-policy Terms & Conditions: https://anthony55hopkins.wixsite.com/hexacalc/terms-conditions
Protern Clock
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Protern Clock puts a precise time of day on every clip you film with a video camera, from the phone you already carry. A camera stamps each clip with its own clock: set once, drifting since, and only ever to the whole second. That is fine for watching. It is not enough to line the clip up with anything else: an athlete's sensor data, a second camera, or the phone footage from the top of the course. Protern Clock gives the camera a time it can trust, accurate to a hundredth of a second. TWO WAYS TO PUT THE TIME ON THE CAMERA LTC Audio. Plug the phone into the camera's mic input with a 3.5 mm cable, press Start, set the phone down beside the camera, and film. The phone sends the time as an audio timecode signal (linear timecode, or LTC, the broadcast standard) and the camera records it on the audio track. The timecode keeps running with the screen off. QR Clock. For a camera with no mic input. The phone shows the time as a QR code that refreshes every frame. Film the phone screen for a few seconds at the start of each clip, then the athlete. Protern Video reads the time from those frames. WHAT PROTERN VIDEO DOES WITH IT Import the clips and they behave like clips filmed on a phone. Each one sorts into the right session on the right day. It lines up with the athlete's Protern Sensor data to a hundredth of a second, so speed, time, and line sit on the frame they belong to. The run names itself when the athlete wore a sensor. And it joins other cameras and phones in one multi-cam run: a single feed that switches from camera to camera at the right instant, or angles side by side, in sync. PROTERN CLOCK AND TIMELINK TimeLink is Protern's LTC generator as a dedicated device, for the camera that films all day. Protern Clock puts the same timecode on the camera from your phone. Most teams use both: TimeLink on the main camera, Protern Clock on the second camera, the borrowed camera, or the camera with no mic input. SETTINGS Frame rate of 24, 25, 29.97, or 30. Timecode on the left, right, or both audio channels. The date embedded in the timecode. The time shows on screen while it runs, so you can check it against the camera. BEYOND PROTERN Any app that reads SMPTE linear timecode can use the signal, including Dartfish and Telemetry Overlay, so the same clip lines up with other sensor data in other analysis and overlay tools. REQUIREMENTS LTC Audio needs a wired 3.5 mm audio connection from the phone to the camera's mic input. An adapter may be needed depending on the phone. Bluetooth audio does not carry the timecode. QR Clock needs no cable. Reading QR Clock needs Protern Video 2.3.15 or later.
Screenshots
Verdict
The clearest difference is price: HexaCalc at Free against Protern Clock's $9.99. HexaCalc also leads on update cadence (monthly vs every 6 months). On ads, 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
HexaCalc is free to download; Protern Clock costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HexaCalc ships an update monthly, Protern Clock every 6 months. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.
| Parameter | HexaCalc | Protern Clock |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.9 (25 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 25 — better | — |
| Update frequency | Monthly — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 2 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Anthony Hopkins | Proskida |
In-app purchases
HexaCalc
No in-app purchases
Protern Clock
No in-app purchases









