Software Alternatives, Accelerators & Startups

Devinterview.io VS Calcumber

Compare Devinterview.io VS Calcumber and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Devinterview.io logo Devinterview.io

Ace your next tech interview with confidence.

Calcumber logo Calcumber

Calculate in a notebook and share โ€” from everyday math to engineering.
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  • Devinterview.io
    Image date //
    2023-12-14
  • Devinterview.io
    Image date //
    2023-12-14

Explore our carefully curated list of interview essentials covering full-stack, data structures, software architecture, machine learning & AI, and behavioral questions.

  • Calcumber Usefulness of units when calculating the weight of paper
    Usefulness of units when calculating the weight of paper //
    2026-07-25
  • Calcumber Calcumber interactively embedd on a web page
    Calcumber interactively embedd on a web page //
    2026-07-25
  • Calcumber Showcase from arithmetics to thermodynamics
    Showcase from arithmetics to thermodynamics //
    2026-07-25

Use variables, functions, and units and see results immediately. Add comments, copy calculations to apps like Word or Excel, or share them through an editable link. Calculate thermodynamic fluid properties with the integrated CoolProp library.

Devinterview.io

$ Details
freemium $19 / One-off (Premium account)
Platforms
Browser Mobile
Release Date
2021 November

Calcumber

Pricing URL
-
$ Details
free
Platforms
Web Windows Linux Mac
Release Date
2025 June
Startup details
Country
Switzerland
State
Aargau
City
Staufen
Founder(s)
Samuel Hartmann
Employees
1 - 9

Devinterview.io features and specs

  • Comprehensive Preparation
    Devinterview.io offers a wide range of interview questions and detailed answers across various programming languages and technologies, helping users prepare thoroughly for technical interviews.
  • User-friendly Interface
    The platform provides a clean and easy-to-navigate interface, making the process of searching for and reviewing interview questions straightforward and efficient.
  • Regular Updates
    The site frequently updates its content with new questions and insights, ensuring that users have access to the latest interview trends and technologies.
  • Community Contributions
    Devinterview.io encourages community interaction, allowing users to contribute their own questions and experiences, adding value and diversity to the platform.
  • Targeted Focus
    The platform specifically targets developers and technical interviews, offering focused resources tailored to the needs of this audience.

Possible disadvantages of Devinterview.io

  • Limited Free Access
    Some features or resources may require a paid subscription, limiting access for those who are not willing or able to pay.
  • Variable Quality
    Since the platform allows user contributions, the quality and depth of the content can vary, presenting challenges in consistency and reliability.
  • Niche Usage
    The platform is primarily geared towards software developers, which may not be useful for those outside of the tech industry or those preparing for non-technical interviews.
  • Anxiety Inducing
    For some users, the vast amount of questions and information can be overwhelming and induce anxiety about the amount they need to study.

Calcumber features and specs

  • ๐ŸŒฟ Naturally type expressions
    get immediate results
  • ๐Ÿ”— Copy and share
    keep calculations editable with a link
  • ๐Ÿงฉ Variables and constants
    pi, e, G, mu0
  • ๐Ÿงช Scientific functions
    sin, acos, log, round, and more
  • โ™จ๏ธ Thermodynamic fluid properties
    refrigeration, heat pumps, steam and air
  • ๐Ÿ’ก Installation optional
    run directly in your browser
  • ๐Ÿ“ฑ Multi-platform
    WebApp, Windows, more to come

Category Popularity

0-100% (relative to Devinterview.io and Calcumber)
Programming
100 100%
0% 0
Math Calculators
0 0%
100% 100
Interview Preparation
100 100%
0% 0
Math Solver
0 0%
100% 100

Questions & Answers

As answered by people managing Devinterview.io and Calcumber.

How would you describe the primary audience of your product?

Devinterview.io's answer

Developer preparing for tech interviews.

Calcumber's answer:

  • The notebook-style calculator is great for everybody who wants more than just a single line calculator.
  • The sharing and embedding features make it Calcumber very well suited for teachers and students. The power of consistently using units is shown immediatly.
  • Engineers will like the unit support, sharing calculations with collegues and if needed the built-in fluid properties calculation.

Which are the primary technologies used for building your product?

Devinterview.io's answer

Javascript, Nuxt

Calcumber's answer:

HTML, CSS, TypeScript, PWA, CoolProp

What makes your product unique?

Devinterview.io's answer

Curated Q&A by a team of staff+ FAANG engineers with 12+ YOE to help you ace your next interview!

Calcumber's answer:

  • Easy to use calculator notebook
  • From simple arithmetic to advanced engineering with units
  • Installation optional
  • Send calculation link with full privacy
  • Embed calculation templates, exercices and soultions in documents or interactively in web pages

Why should a person choose your product over its competitors?

Devinterview.io's answer

We have over 11,000+ total questions curated over 5+ years. The lifetime deal pricing is more cost-effective than monthly LLM (e.g. ChatGPT, Gemini) subscription.

Calcumber's answer:

  • Sharing calculations and embedding them in documents or web pages is perfect for education.
  • Natural unit support, just include them in your expression and Calcumber handles it.
  • Free and easy access to thermodynamic fluid-properties.

What's the story behind your product?

Devinterview.io's answer

We want to help folks with a curated list of questions to reduce the stress of how to prepare for tech interviews. Progress tracking eases stress.

Calcumber's answer:

When starting for a Master of Advances Study in Energy Systems, I was looking for a suitable state-of-the-art calculator. Then I built my own Calculator Calcumber and now the Eastern Switzerland University of Applied Sciences is using Calcumber for teaching students in thermodynamics.

Who are some of the biggest customers of your product?

Devinterview.io's answer

We do not have "whale" customers. Since this is Lifetime Deal business models, all our customers are equally important.

User comments

Share your experience with using Devinterview.io and Calcumber. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Devinterview.io seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Devinterview.io mentions (2)

  • 8 Secrets of Top 1% Successful Software Engineers
    Top engineers also play a crucial role in improving the interview process within their organization. They actively participate in hiring committees, provide feedback on interview processes, and advocate for best practices. By ensuring a fair and effective interview process, they contribute to building a strong team and maintaining high standards of excellence. - Source: dev.to / over 2 years ago
  • Don't Let These 7 Critical Mistakes Ruin Your Technical Interview
    Do not underestimate the importance of practicing coding under time constraints similar to those you'll face in interviews. Time pressure and the expectation to verbalize your thought process while coding can be challenging. To navigate this successfully, you can use online coding platforms that offer problems mimicking real interview scenarios. Practicing timed coding challenges can dramatically improve your... - Source: dev.to / over 2 years ago

Calcumber mentions (0)

We have not tracked any mentions of Calcumber yet. Tracking of Calcumber recommendations started around Jul 2026.

What are some alternatives?

When comparing Devinterview.io and Calcumber, you can also consider the following products

FullStack.Cafe - FullStack.Cafรฉ helps Devs to crack Tech Interviews and land the jobs they love.

Numara Calculator - A simple but powerful notepad calculator which evaluates expressions as you type.

CrackCode.dev - CrackCode โ€” 15-minute daily coding interview prep. Master DSA patterns, system design, and behavioral interviews one cup of tea at a time.

SpeedCrunch - 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 Donateย .

GeeksforGeeks - A computer science portal for geeks

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.