Dev tools · alternatives · 2026
24 alternatives to Roman Numeral Converter
Hello, I just launched a new tool on Universal-Calculator.com — a clean, fast, and free Loan Calculator to help anyone estimate monthly payments, interest costs, and total loan repayments. Key Features: Supports personal, home, car, student, and business loans Calculates monthly payments, total interest, and amortization Built with vanilla JS + TailwindCSS for performance Fully mobile responsive and zero ads No data tracking, just a simple and fast tool Why I built it: Most online calculators are either bloated with ads or unintuitive. I wanted something that just works — fast,…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written. Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which should make it relatively easy to get document sharing working too. [1] https://automerge.org/
2022 · numpad.io · its alternatives →
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I’ve always found that online calculators tend to have bad UIs, especially on mobile. Most of the calculator websites I’ve come across use outdated and inconvenient ways of inputting data, or they format the results in confusing ways. I’ve noticed that fraction calculators (especially mixed fractions) are terrible to use, even on desktop. I haven’t built one of those yet, but it’s something I’m planning to tackle soon. This is a project I’ve always wanted to work on, but I’m relatively new to this space. So far, I’ve created a collection of simple calculators focused on math and finance. I’d…
2025 · its alternatives →
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Fast and easy to use currency and units converter
2017 · play.google.com · its alternatives →
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Hi HN! I built ToolDexo - a collection of 29 free online tools because I was tired of websites that force you to sign up just to use a calculator or word counter. What's included: - Calculators: BMI, calorie, mortgage, loan, tax, grade, tip, percentage, age, compound interest - Converters: Currency (36 currencies with live rates), unit, timezone, file size - Generators: Password, QR code, favicon, color picker, Lorem Ipsum, random number - Text tools: Word counter, case converter, character counter, text compare, Markdown editor - Dev tools: JSON formatter, Base64 encoder/decoder Tech…
2025 · minitools4u.com · its alternatives →
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I Built a Comprehensive Suite of Free Online Tools: 300+ Calculators, Converters, and Random Generators After months of coding and development, I'm excited to share my website offering a vast collection of free online calculators, unit converters, and random generators all in one place. This project was created to simplify everyday tasks and provide accurate tools for various needs. What You'll Find on My Site: Calculators: - Financial tools: ROI, APY, mortgage calculators - Business tools: Break-even, commission calculators - Mathematics: From basic to advanced functions - Health: BMI, BMR,…
2025 · calculatinghub.com · its alternatives →
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Free interactive calculators with premium UX for daily life
Nov 2025 · easycalculator.com · its alternatives →
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Hi HN, I built CD Calculator – https://cd-calculator.net – a simple tool that helps people calculate interest returns on bank CDs (Certificates of Deposit). Most CD calculators online are either too basic, too outdated, or full of ads. I wanted to make something that's: - Clean and fast - Easy to use - Focused on accuracy With this tool, users can: - Enter principal, rate, and term to get instant results - Simulate compound interest monthly or annually - Copy results with one click Advanced features are coming soon, including: - Recurring deposits - Early withdrawal penalty…
2024 · cd-calculator.net · its alternatives →
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Start building the future of your company, today. Create powerful on brand calculators, lead generation forms and apps that automate your marketing and sales processes.
2019 · convertcalculator.co · its alternatives →
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I built a mortgage payment calculator for people who just want clean, fast numbers without the lead-gen friction. https://toolvault.co/tools/mortgage-payment-calculator It started because every time I tried to run mortgage scenarios, I hit one of these problems: Forms that demand email/phone before showing results Slow, ad-heavy pages that feel like landing funnels, not tools Calculators that only show principal + interest, ignoring real monthly costs What this tool does: Calculates full monthly housing cost: principal, interest, property tax, insurance, PMI, and HOA…
Jan 2026 · toolvault.co · its alternatives →
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Fast unit, currency & finance converters—clear results
2025 · evolve-converter.com · its alternatives →
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25 free calculators - your numbers never leave your browser
Jul 2026 · moneycrunchlab.com · its alternatives →
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250+ free calculators for finance, health, math & more
Jun 2026 · worldculator.com · its alternatives →
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CalcWise▲2Free finance calculators and unit converters
May 2026 · calcwise.online · its alternatives →
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Simple, fast, and free unit converter for everyday use
Jan 2026 · units.ashwinig.com · its alternatives →
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Free smart mortgage calculator with amortization schedules.
Jul 2026 · globaltoolsbox.online · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →