
Video Speed Controller
Global hotkeys for your favourite music players.

Numara Calculator
SpeedCrunch
Qalculate!
Numi App
Soulver
Numby
Engineering Equation Solver
Calculate in a notebook and share — from everyday math to engineering.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | streamkeys.com | calcumber.app |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from Switzerland · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Streamkeys yet.
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.
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Streamkeys and Calcumber.
Calcumber's answer:
Calcumber's answer:
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.
Calcumber's answer:
Calcumber's answer:
HTML, CSS, TypeScript, PWA, CoolProp
Calcumber's answer:
Share your experience with using Streamkeys and Calcumber. For example, how are they different and which one is better?
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Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
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A simple but powerful notepad calculator which evaluates expressions as you type.
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