calculate.at vs ShipRank

calculate.at is a free, no-signup calculator platform with more than 290 tools covering everyday finance, health, math, construction, science, unit conversion, dates, and a handful of casual games. There's no account to create, no email to hand over, and no paywall anywhere on the site — every calculator loads instantly and gives an answer in the browser.

The core idea behind the site is transparency. Most calculator tools online just spit out a number with no explanation, making it impossible to know whether the result is right. calculate.at does the opposite: every page shows the formula behind the result, walks through a couple of worked examples with real numbers, and directly answers the specific questions people search for around that topic. That means a user can check the math themselves instead of trusting a black box — useful for students verifying homework, freelancers double-checking a tax figure, or anyone who wants to understand how a number was derived rather than just copy it.

The catalog is organized into six categories — Math, Health, Conversion, Finance, Date & Time, and Games — ranging from everyday tools (percentage calculators, tip splitters, unit converters, BMI, date-difference calculators) to more specialized ones like mortgage amortization schedules, body-fat estimates, sales tax by jurisdiction, and construction material quantity estimators. New calculators are added regularly, prioritized by what people are actually searching for rather than a fixed roadmap.

Pages are lightweight, load fast, and don't bury the calculator under intrusive ads. The goal is that someone lands from a search result, gets their answer in seconds, and can see exactly how it was calculated if they're curious.

calculate.at is built for anyone who needs a fast, verifiable answer without friction: students, freelancers doing quick financial math, homeowners planning a renovation, or anyone who just typed "what is 15% of 240" into a search bar.

Best for: Anyone needing quick calculations without signup.

• Percentage calculation
• Sales tax calculation
• Health metrics
• Unit conversion
• Date calculations

See the full listing - calculate.at on ScrollLaunch.

ShipRank is a public GitHub leaderboard built for developers who want to make their work more visible. It turns your GitHub activity into a score, tracks your consistency, and gives you a public profile to showcase what you build.

What you can do:

🏆 See your rank based on your GitHub activity

📈 Track your progress with scores, contributions, and streaks

👨‍💻 Build your developer profile with your work and social links

🚀 Showcase your products and the things you’re building

🔗 Share your profile as a simple proof of your work

ShipRank is free to use and uses public GitHub data to build your profile. No private repository data is accessed.

Best for: Developers seeking visibility and accountability for their contributions.

• Developer ranking
• Project visibility
• Contribution tracking
• Accountability streaks

See the full listing - ShipRank on ScrollLaunch.