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Amni-Calc — free WASM engineering modules for bolted joints, stress analysis, beams, and related mechanical checks. Theory + calculator on the same page; data never leaves the browser. Open modules at amni-scient.com/calc/ (e.g. bolts, stress, beam).

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | amni-scient.com | diffyn.com |
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| Company | Startup from the United States · 1 - 9 employees | — |
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In their own words, as submitted to SaaSHub.


37 engineering calculators in one browser tab: beams, bolts, springs, seals, fatigue, fluids, heat exchangers, pressure vessels, HVAC, electrical, machining, hydraulics, rigging, CAD Studio, and more. Each module carries the theory, a worked example, and a cited standard. The math runs as...
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As answered by people managing Amni-Calc and Diffyn.
Amni-Calc's answer
It's 37 engineering calculators in one browser tab: beams, FEA, bolts, springs, seals, fatigue, fluids, heat exchangers, pressure vessels, HVAC, electrical, machining, hydraulics, rigging, CAD Studio. Each module has theory, a worked example, and a cited standard. The kernels run as WebAssembly in the page, so you don't install anything, I don't collect telemetry, and I don't make you create an account.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Amni-Calc's answer
You get 37 modules in one tab, each with theory, a worked example, and a cited standard. It runs locally in the browser, free, with no account and no telemetry. Closest peer on my listing is MechanixCalc.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Amni-Calc's answer
Rust compiled to WebAssembly, HTML and JavaScript, Plotly, and Three.js. Hosted on amni-scient.com.
Diffyn's answer:
React, Next.js, POSTGRESQL
Amni-Calc's answer
Mechanical and design engineers, students, and anyone who sizes beams, bolts, springs, seals, fluids, heat exchangers, vessels, HVAC, or electrical work in a browser.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Amni-Calc's answer
Everyday engineering calcs were either toy web calculators or install-bound software. I built WASM kernels with cited standards, worked examples, Plotly and 3D, and put them in the browser with no account.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
Amni-Calc's answer
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