
SpeedCrunch
Numi App
Soulver
fxSolver
SpeQ Mathematics
NumWorks
OpenCalc
Qalculate! is a multiplatform multi-purpose desktop calculator.
Plot Digitizer
g3data
DataThief III
DigitizeIt
im2graph
Silkscientific UN-SCAN-IT
GraphClick
WebPlotDigitizer - Web based tool to extract numerical data from plots, images and maps.
Which is more popular?
Based on our record, Qalculate! seems to be more popular. It has been mentioned 35 times since March 2021.
Website, pricing, platforms and company facts side by side.
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WPD
WebPlotDigitizer
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| Website | qalculate.github.io | automeris.io |
| Pricing | ||
| Listed in |
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
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.
Overall verdict
Why this product is good
Recommended for
WebPlotDigitizer is recommended for researchers, scientists, data analysts, and students who frequently need to extract data from published graphs and charts. It is particularly useful in fields such as biology, engineering, physics, and any other areas where visual data needs to be quantitatively analyzed.
Walkthroughs and reviews on video.
DSP Raspberry Pi 4 Qalculate! Install
π΄ Webplotdigitizer Tutorial - A Plot Digitizer to Digitize Graphs
More videos
How often each product is chosen within a category, 0β100% relative to the other.

Share your experience with using Qalculate! and WebPlotDigitizer. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

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 / 9 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
Tracking WebPlotDigitizer since Mar 2021.
When comparing Qalculate! and WebPlotDigitizer, you can also consider the following products.

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 DonateΒ .
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All-in-One Tool to Extract Data from Graphs, Plots & Images
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Numi is a beautiful text calculator for Mac.
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g3data is used for extracting data from graphs.
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Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.
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DataThief III is a program to extract (reverse engineer) data points from a graph.
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