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Off2Class VS Calcumber

Compare Off2Class VS Calcumber and see what are their differences

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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Off2Class logo Off2Class

Off2Class is the ESL teacher toolkit that saves time and drives equitable English Learner outcomes

Calcumber logo Calcumber

Calculate in a notebook and share โ€” from everyday math to engineering.
Visit Website
  • Off2Class Landing page
    Landing page //
    2023-10-18

Off2Class is a teacher toolkit that provides English as a Second Language (ESL) teachers with extensive lesson content, homework, a placement test and assessments that work seamlessly between physical and online classrooms. This โ€˜digital-firstโ€™ approach is perfect for hybrid programming needs. It also allows teachers working with English Learners (ELs) to save time and ultimately create a better learning experience for students.

Off2Class supports student and teacher success in virtual or face-to-face settings. In both settings, teachers can assign homework and assessments in just a few simple steps. When using Off2Class, there is no need for teachers to plan for every lesson. Instead, teachers can focus on student learning progress and addressing individual needs while ultimately saving time and resources.

Off2Class is designed with equity in mind and can be utilized in low bandwidth environments on any screen-enabled device. Students can use a phone, tablet or laptop to attend lessons and complete post-lesson activities and reviews. There is no special application to download: itโ€™s browser-based simplicity.

  • 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.

Off2Class

Website
off2class.com
Pricing URL
Official Off2Class Pricing
$ Details
freemium
Platforms
Web Browser Google Chrome Firefox Safari Linux
Release Date
2015 March
Edit details

Calcumber

Website
calcumber.app
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
Edit details

Off2Class features and specs

  • Comprehensive Lesson Library
    Off2Class offers a vast library of ESL lesson plans and materials, covering various topics and proficiency levels. This provides teachers with ready-to-use resources that can save preparation time.
  • Placement Test Tool
    The platform includes a placement test that helps educators assess the initial language proficiency level of their students, allowing for tailored and effective teaching strategies.
  • Ease of Use
    Off2Class is user-friendly with a straightforward interface that makes it accessible for both teachers and students, facilitating seamless integration into the classroom or online learning environment.
  • Student Management
    The platform includes tools for tracking student progress, assignments, and feedback, which enhances the teacher's ability to monitor student performance and tailor instruction accordingly.
  • Customization
    Teachers can customize lesson plans and materials to better fit the needs of their students, offering a degree of flexibility that supports personalized education.

Possible disadvantages of Off2Class

  • Cost
    Off2Class might be cost-prohibitive for some educators or institutions, especially for those with limited budgets, as it requires a subscription to access full features.
  • Limited Offline Access
    The platform primarily requires an internet connection for both teacher and student access, which can be a limitation in areas with unreliable internet connectivity.
  • Focus on ESL
    While Off2Class is excellent for English as a Second Language instruction, its focus might not meet the needs of teachers from other subject areas or those looking for multilingual educational resources.
  • Learning Curve for New Users
    Although the platform is user-friendly, new users might still encounter a learning curve before they can fully utilize all features and functions effectively.

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

Analysis of Off2Class

Overall verdict

  • Off2Class is a well-regarded platform for ESL and English language teachers, offering ready-made lesson content, placement testing, and student management tools that save preparation time and support effective online teaching.

Why this product is good

  • Provides a large library of pre-made, professionally designed ESL lesson plans that reduce preparation time
  • Includes a free placement test to accurately assess student levels and assign appropriate materials
  • Offers homework and assignment tools that let teachers track student progress
  • Works well for both online and in-person teaching with easy-to-share digital slides
  • Trusted by many independent tutors, tutoring companies, and language schools

Recommended for

  • Independent ESL/English tutors looking to save lesson planning time
  • Online English teachers needing structured digital lesson content
  • Tutoring businesses and language schools managing multiple students
  • New teachers who want ready-made, level-appropriate materials
  • Educators who need reliable placement testing and progress tracking

Off2Class videos

+ Add

What is Off2Class?

More videos:

  • Review - Off2Class reviews and assessments: what they are and when to use them
  • Review - Off2Class Review - ESL Lesson Plan Library
  • Review - Understanding the Off2Class Classroom and Interactive Tools

Calcumber videos

No Calcumber videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Off2Class and Calcumber)

Off2Class

Calcumber

Edtech
100 100%
Edtech
0% 0
Education
53 53%
Education
47% 47
Engineering Calculator
0 0%
Engineering Calculator
100% 100
Language Learning
100 100%
Language Learning
0% 0

Questions & Answers

As answered by people managing Off2Class and Calcumber.

Why should a person choose your product over its competitors?

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 makes your product unique?

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

What's the story behind your product?

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.

How would you describe the primary audience of your product?

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?

Calcumber's answer:

HTML, CSS, TypeScript, PWA, CoolProp

Who are some of the biggest customers of your product?

Calcumber's answer:

Eastern Switzerland University of Applied Sciences

User comments

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What are some alternatives?

When comparing Off2Class and Calcumber, you can also consider the following products

Blackboard Learn - Blackboard provides enterprise technology and innovative solutions that enhance teaching and learning methods

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

Cambly - Private language tutors on demand.

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 .

Italki - italki is a language learning social network that connects students and language teachers.

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

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