Looking for something like PlanetCalc? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 3 are free or have a free plan and 4 are open source.
PlanetCalc catalogs online calculators for topics including dates, time, science, engineering and everyday conversions.
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Omni Calculator | — | Not stated | Web |
| 2 | WolframAlpha | — | Not stated | Web |
| 3 | Omniglot | — | Not stated | Web |
| 4 | Scolary | Free | Not stated | Web |
| 5 | Wiki Portals | — | Not stated | Web |
| 6 | NotebookCast | — | Not stated | Web |
| 7 | WebWhiteboard | — | Not stated | Web |
| 8 | Anki | — | Not stated | Android, Web |
| 9 | StudyStream | — | Not stated | Web |
| 10 | Time Traveler | — | Not stated | Web |
Omni Calculator provides hundreds of custom-built online calculators for everyday problems in finance, business, health, math, statistics and construction.
WolframAlpha provides math answers and calculators across algebra, calculus, geometry, number theory and other topics.
Omniglot catalogs writing systems and languages, with alphabets, language profiles and study resources.
Scolary catalogs research tools and scientific resources for academic workflows.
Wikipedia Portals organizes navigation links by subject areas such as culture, geography, history and science.
NotebookCast provides a real-time collaborative whiteboard with audio and video calls for teaching, sketching and teamwork.
Web Whiteboard lets people sketch, brainstorm and share ideas in a real-time collaborative workspace.
Anki schedules flashcard reviews to help users spend more time on challenging material, with media support and device sync.
StudyStream offers online focus rooms where students can study alongside others at any time.
Merriam-Webster Time Traveler finds words based on the year they were first recorded in print.
The TI-84 online simulator provides graphing and scientific calculator tools with an accompanying manual.
Use Kalker as a calculator with custom variables, functions, differentiation and integration on desktop, mobile or web.
Symbolab solves algebra, trigonometry and calculus problems step by step, with calculators for equations, derivatives and integrals.
arTIfiCE restores assembly programs and games on compatible TI CE calculators through a jailbreak.
ticalc.org archives user-contributed files for TI graphing calculator models, with sections for programs and hardware.
Numbr combines a calculator with a notepad for working with notes and numbers in one document.
WBO supports real-time drawing by multiple users on a shared online whiteboard, with its code available as open source.
StudyLion is a Discord bot that tracks study time and provides to-do lists, Pomodoro timers and reminders.
Anki schedules digital flashcards with spaced repetition to help users review material over time.
Use yetCalc as a calculator on Android, as specified by the project repository.
CEmu emulates TI-84 Plus CE and TI-83 calculator models with functionality for developers, according to its repository page.
microMathematics Plus is a visual calculator with a worksheet layout, graphing and function plotting.
OpenCalc provides calculator features in an Android app, according to its repository description.
The U.S. Climate Resilience Toolkit helps users explore climate-related risks and practical resources for addressing local hazards.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative
