
import.io
Octoparse
Apify
ParseHub
Data Miner
Kimono
Crawlera
Get data from web pages automatically

SpeedCrunch
Numi App
Event Viewer
Soulver
fxSolver
SpeQ Mathematics
NumWorks
Qalculate! is a multiplatform multi-purpose desktop calculator.
Which is more popular?
Based on our record, Qalculate! seems to be a lot more popular than Diffbot. While we know about 35 links to Qalculate!, we've tracked only 1 mention of Diffbot.
Website, pricing, platforms and company facts side by side.
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| Website | diffbot.com | qalculate.github.io |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Qalculate! is recommended for students, engineers, scientists, and anyone who requires a robust computing tool for everyday calculations, unit conversions, and advanced mathematical functions. It's also ideal for users who appreciate open-source software and those looking for a customizable and comprehensive calculator.
Walkthroughs and reviews on video.
Correcting Diffbot API Output Using the Custom API Toolkit
DSP Raspberry Pi 4 Qalculate! Install
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Diffbot and Qalculate!. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Diffbot uses computer vision, unlike any other tools to identify relevant information on a page. As long as the page looks the same visually, the web scrapers will never break even if the HTML structures change.
The 600 lbs gorilla, Diffbot, comes with a swath of solid APIs but starts at $300, which is ridiculous if you’re just extracting text. Scrapinghub’s News API, Extractor API, and plenty more are better priced if you...
We have no reviews of Qalculate! yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


I work in non-profit/social impact and I'm trying to get a snapshot of themes/issues that concern a subset of organizations (say a total of 500) in our network via news/articles that these orgs may have published or that these orgs may... Source: about 4 years ago
Qalculate is my favourite REPL-like calculator, although it unfortunately lacks an iOS app. It feels similar to using an HP 48-series calculator. Numbat is similar, but more... - Source: Hacker News / 8 months ago
Https://qalculate.github.io can do this also for as long as I've used it (only a couple years to be fair). I've got it on my phone, my laptop, even my server with the qalc command. Super convenient, supports everything from unit... - Source: Hacker News / over 1 year ago
Interesting project. I use command line Qalculate [1] for this (has a very similar feature set to Frink AFAICT) and Pint [2] for scripting. I feel like unit-aware calculators are hugely underused by physical engineers, it's the same idea... - Source: Hacker News / over 1 year ago
When comparing Diffbot and Qalculate!, you can also consider the following products.

Import. io helps its users find the internet data they need, organize and store it, and transform it into a format that provides them with the context they need.
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SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
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Octoparse provides easy web scraping for anyone. Our advanced web crawler, allows users to turn web pages into structured spreadsheets within clicks.
Compare Octoparse to Diffbot or Qalculate!:


Apify is a web scraping and automation platform that can turn any website into an API.
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Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.
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