Calc Engine vs DataPocket
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc Engine
A highly customizable calculator with advanced features like graphing, equation solving, and unit conversion. Design your own keyboards and functions to streamline your workflow across Apple devices.
- Customizable keyboard layouts
- User-defined functions and constants
- Live equation graphing
- Equation solving
- Extensive unit conversions
- Programmer mode (hex, binary, octal)
- Cross-device syncing
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Calc Engine™ — The Calculator That Fits How You Work Whether you're splitting a dinner bill, plotting an equation, or working through bitwise logic, Calc Engine meets you where you are. It's a beautiful, fully customizable calculator that grows with you — and syncs seamlessly across iPhone, iPad, Mac, and Apple Watch. Make it look and feel like yours • Choose from rich color themes to match your style • Pick the fonts and key shapes that feel right in your hands • A calculator you actually enjoy opening Design keyboards your way • Build your own keyboard pages — drag any key from a curated library onto a 4×5, 5×5, or 6×5 grid • Mix digits, operators, scientific functions, your own constants — anything you reach for often, all in one place • Set a long-press alternate on any key so a single tile handles a primary and secondary action • Name each keyboard, pick its icon, and reorder it alongside the standard pages — your custom keyboards show up right where you'd expect them • Enable or disable any page (built-in or custom) per device Build your personal math library • Define your own functions with up to three parameters — name them whatever makes sense to you • Save the constants you use all the time and insert them with a single tap • Full calculation history, automatically saved — scroll back anytime Powerful math, always within reach • Trig (radians or degrees), logarithms, exponentials, roots, and more — there when you need them, out of the way when you don't • Live results as you type, so you always know where you're headed • Per-function rounding built in — perfect for money, measurements, or anything that needs a clean output Convert between hundreds of units in seconds • Tap a value, then any two units to see the conversion live — miles to km, lb to kg, °F to °C, gal to L, anything you need • 250+ built-in units across 40+ categories: length, mass, volume, temperature, time, speed, angle, energy, power, pressure, electrical, magnetic, optical, radioactivity, data, and more • Favorite the categories you actually use so they sit at the top — synced across your devices automatically • Build your own functions with conversions baked in — define a formula once and reuse it forever See your equations come to life in graphs • Plot equations like x = y² or sin(x) live as you type, right beside the keyboard • Tap any graph to expand into a full-screen view for closer inspection • A dedicated graphing keyboard with x, y, and = keeps everything in one place — no separate app, no separate mode Solve equations as you type • Type x² = 121 or sin(x) = 0.5 and Calc Engine finds every real answer • Tap the solved answers to reuse it in your next calculation, no separate "solve" mode Programmer mode without leaving the calculator • Type hex (0x), binary (0b), and octal (0o) literals — read and write the way you read code • A full bitwise toolkit: AND, OR, XOR, NOT, shifts, and rotates • Every result shown in HEX, DEC, OCT, and BIN simultaneously, with configurable word size (8/16/32/64) and signed/unsigned interpretation • Tap the binary row to expand into a byte-by-byte view with bit-position labels Private by design • Everything syncs through your personal iCloud — nothing stored on our servers • Fully localized and native on every Apple platform Unlock Calc Engine+ for the full experience — custom themes, fonts, key shapes, custom keyboards, user-defined functions, saved constants, unit conversions, live graphing, equation solving, programmer-mode hex/binary/bitwise, and more. Everything that makes Calc Engine truly yours. Teach it your formulas once. Customize it to feel like home. Use it forever.
DataPocket
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Data Pocket is a versatile note-taking app that lets you easily customize text with adjustable font sizes, colors, and other formatting options using simple one-tap controls. It also supports creating photo journals by inserting images into your notes. Your notes can be: - Organized by attaching them to a calendar. - Sorted and stored in a hierarchical folder structure. The app also includes a shared calendar feature that allows multiple users to edit the same calendar collaboratively. In addition to text notes, you can manage photos, videos, music data, and web pages in the same folder hierarchy, each with its own comments. You can automatically play videos or music stored in a folder, with customizable playback order and repeat settings, and even transfer music files to your Apple Watch for standalone playback without your iPhone. The app also allows you to extract audio from videos, such as screen recordings, and compress and save it as music data. Data Pocket also provides powerful features such as full-text search across all notes, text editing utilities, and automatic text recognition (OCR) from images. Furthermore, text notes can be displayed with automatic scrolling or viewed directly on your Apple Watch. Additional features include RSS news feed integration and options to customize button layouts and the startup screen appearance, among many other useful tools. Starting from version 2.0, WebLink feature has been added, allowing users to view and create notes in this app from a web browser on a PC or other devices. We regret to inform you that, since then, features that require the use of server resources has been made available only as a paid option. To use it, a subscription or ticket purchase is required. Your use of this application is subject to Apple’s standard Licensed Application End User License Agreement (“Standard EULA”). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Please note that there may still be some bugs remaining, and we cannot take responsibility should any issues arise. However, we are releasing it in the hope that it will be useful to many people, so we would be grateful if you could try it out casually at first. Enjoy utilizing this app and make the most of it.
Screenshots
Verdict
The clearest difference is update cadence: Calc Engine at daily against DataPocket's weekly. DataPocket's advantage is iOS requirement (16.4 vs 18). On price, 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
Both are free to download. Calc Engine sells 1 one-off in-app purchase and DataPocket sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Calc Engine ships an update daily, DataPocket weekly. The most recent releases landed on August 31, 2026 and September 20, 2026 respectively.
| Parameter | Calc Engine | DataPocket |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Daily — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 18 | 16.4 — better |
| Further details — not scored | ||
| Size | 17 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | VersaEdge Software, LLC | KENJIRO OBORA |
In-app purchases
Calc Engine
- Calc Engine+$9.99
DataPocket
- Monthly Subscription$4.991 Month
- WebLink 5 Tickets$4.99
Questions
Is Calc Engine free?
Is DataPocket free?
Do Calc Engine or DataPocket have ads?
Which is updated more often, Calc Engine or DataPocket?
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