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Every calculator you'll ever need for money, health, math, and everyday conversions — worked examples included, nothing to sign up for.

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Which is more popular?
Based on our record, calculate.at seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | calculate.at | stackseed.dev |
| Pricing | ||
| Platforms | — | |
| Company | 2026 | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


calculate.at is a lightweight online calculator platform built for fast, practical answers. It offers a growing collection of free utility tools for finance, SaaS metrics, SEO, marketing, infrastructure, and everyday problem-solving. Whether you need an ROI calculator, break-even calculator, LTV...
StackSeed is a directory of developer starter templates — filter by tech stack, category, price and payment provider instead of scrolling GitHub for hours. Free and premium boilerplates side by side, with the real tradeoffs (open source vs. paid) made explicit.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of StackSeed.dev yet.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing calculate.at and StackSeed.dev.
StackSeed.dev's answer:
Filters that actually match how you'd search — by tech stack, category, price and payment provider — and pricing that's stated plainly, including whether something's open source, free, or paid. No account needed to browse.
StackSeed.dev's answer:
Developers starting a new project — a SaaS, a directory, a landing page — who'd rather spend a few minutes filtering by stack and budget than an afternoon comparing options scattered across GitHub and blog posts.
StackSeed.dev's answer:
StackSeed is a curated directory of developer starter kits — filter by tech stack, category, price and payment provider to find the one that actually fits your project, instead of losing an afternoon scrolling GitHub. Every listing is upfront about whether it's open source, free, or paid.
StackSeed.dev's answer:
Started as a personal tool to stop re-doing the same research — comparing starter kits scattered across GitHub, Twitter and blog posts — every time a new project began.
StackSeed.dev's answer:
Next.js 15 (App Router), React 19 and TypeScript on the frontend, styled with Tailwind CSS v4.
Share your experience with using calculate.at and StackSeed.dev. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I run calculate.at, a free site with 290+ online calculators — mortgage payments, BMI, unit conversions, percentages, that kind of thing. No account system, no analytics pixels chasing you around, no backend at all. Every calculation... - Source: dev.to / 3 months ago
Tracking StackSeed.dev since Sep 2026.
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