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Apache Struts VS CalcSphere

Compare Apache Struts VS CalcSphere and see what are their differences

Apache Struts

Apache Struts is an open-source web application framework for developing Java EE web applications.

Rating
0 reviews
Alternatives Is it good?
CalcSphere

70+ free online calculators for EMI, BMI, Zakat, finance, health, math, construction, and unit conversion. No sign-up. Instant results. 100% free.

Rating
0 reviews
Pricing
Free Free trial
Alternatives Is it good?
AeroDataBox
Aviation and flight API tailored for SMBs and individual developers, offering flight status, schedules, aircraft and airport data, statistics, historical data and more. Seamless REST/web hook integration via API marketplaces at affordable rates. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Apache Struts seems to be more popular. It has been mentioned 2 times since March 2021.

social mentions
2 vs 0
Developer Tools popularity
100% vs 0%
alternatives listed
113 vs 40

Base details

Website, pricing, platforms and company facts side by side.

Apache Struts
CalcSphere
Website struts.apache.org calcsphere.org
Pricing —
Free Free trial Official pricing
Listed in
Web Frameworks Developer Tools JavaScript Framework JavaScript Tools +1
1. Finance 2. Education 3. Productivity Online Calculators Calculators Finance Education Personal Finance Finance Calculators Tax Calculator Engineering Calculator Advanced Calculator Health Calculators Tool +9

Features and specs

What each product offers, as listed by its team.

Apache Struts 5 features
CalcSphere 5 features
  • Robust Framework
    Apache Struts is a mature and well-established framework for Java web applications, providing stable and reliable tools for enterprise-level applications.
  • MVC Architecture
    Struts adheres to the Model-View-Controller (MVC) design pattern, which separates business logic, presentation, and navigation, making code maintenance and development easier.
  • Extensive Documentation
    Struts has comprehensive documentation and a wealth of online resources, including tutorials, community forums, and user guides, which can support developers throughout their projects.
  • Rich Tag Library
    It comes with a rich set of custom tags that enhance the JSP (JavaServer Pages) to create dynamic web content easily.
  • Plugin Support
    Apache Struts supports various plugins that can extend its functionality, allowing developers to integrate additional features without much effort.

Possible disadvantages

  • Steep Learning Curve
    New developers might find Struts challenging to learn due to its complexity and the need for a good understanding of the MVC architecture and Java web application development.
  • Configuration Overhead
    The framework requires extensive XML configuration, which can be cumbersome and time-consuming compared to convention-over-configuration frameworks.
  • Performance
    Struts can be slower than some newer, lighter frameworks due to its broader feature set and the overhead associated with its extensive configuration.
  • Security Vulnerabilities
    Struts has had notable security vulnerabilities in the past. Although patches and updates are available, it necessitates proactive monitoring and maintenance.
  • Outdated Compared to Modern Frameworks
    With the advent of modern frameworks like Spring MVC and JavaServer Faces, some developers consider Struts to be less up-to-date with the latest web development standards and practices.
  • Free to use
    CalcSphere appears to be a free online calculator and math tool platform, making it accessible to students, educators, and professionals without any cost barrier.
  • Web-based accessibility
    As a web-based platform, CalcSphere can be accessed from any device with a browser and internet connection, without requiring software installation.
  • Multiple calculator types
    The platform offers a variety of calculators and mathematical tools covering different areas, providing users with a one-stop resource for various computation needs.
  • User-friendly interface
    The site is designed with a clean and straightforward interface, making it relatively easy for users to find and use the calculators they need.
  • Educational utility
    CalcSphere can serve as a helpful educational resource for students learning math and related subjects, providing quick computation and verification of answers.

Possible disadvantages

  • Limited brand recognition
    CalcSphere is not as widely known or established as major calculator platforms like Wolfram Alpha, Desmos, or Symbolab, which may lead to lower user trust and a smaller community.
  • Limited advanced features
    Compared to more established platforms, CalcSphere may lack advanced computational capabilities such as symbolic algebra, complex graphing, or step-by-step solution breakdowns.
  • Sparse documentation and support
    As a smaller platform, CalcSphere may have limited documentation, tutorials, or customer support options compared to larger, more established competitors.
  • Internet dependency
    Being entirely web-based means users cannot access CalcSphere's tools offline, which can be a limitation in areas with unreliable internet connectivity.
  • Uncertain long-term reliability
    As a lesser-known platform, there may be concerns about its long-term maintenance, updates, and availability compared to tools backed by larger organizations or companies.

Analysis

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

Apache Struts
CalcSphere

Overall verdict

  • Apache Struts is a robust framework, suitable for building Java-based web applications, but it's crucial to stay vigilant regarding security updates.

Why this product is good

  • Apache Struts is known for its MVC framework, which is useful for creating well-structured and maintainable Java applications. It provides a range of comprehensive features like a flexible tag library, integration with other Java frameworks, and a strong support community. However, it has faced some high-profile security vulnerabilities in the past, underscoring the importance of keeping the framework timely updated.

Recommended for

  • Organizations developing enterprise-level Java applications
  • Developers familiar with Java and looking for a robust MVC framework
  • Teams interested in integrating their web applications with other Java technologies

Overall verdict

  • I don't have reliable information about CalcSphere (calcsphere.org), so I can't verify whether it's a good or trustworthy service. Please research it independently before relying on any assessment.

Why this product is good

  • I cannot find verified details about this specific website's features, reputation, or reliability
  • Any positive claims I might make would be unsubstantiated and potentially misleading
  • Legitimate services typically have verifiable reviews, clear ownership, and established track records you can check
  • You should look for independent user reviews, security indicators (HTTPS, privacy policy), and third-party ratings before trusting it

Recommended for

  • Users who first verify the site's legitimacy through independent reviews and research
  • People who confirm the service meets their specific needs after testing it cautiously
  • Anyone who checks for security and privacy protections before sharing personal or financial information

Videos

Walkthroughs and reviews on video.

Apache Struts 3 videos + Add
CalcSphere 0 videos + Add

Finding and Fixing Apache Struts CVE-2017-5638 with Black Duck Hub

More videos

  • - Apache Struts 2 - remote command execution
  • - Dark ambient drone music | Vulnerable Apache Struts installation under attack (Java, Jakarta)

No CalcSphere videos yet. You could help us improve this page by suggesting one.

Category popularity

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

Score bands 0–20 21–40 41–50 51–60 61–100
Apache Struts
CalcSphere
100% 100%
Developer Tools
0% 0%
0% 0%
Calculators
100% 100%
100% 100%
Web Frameworks
0% 0%
0% 0%
Online Calculators
100% 100%

Questions & Answers

As answered by people managing Apache Struts and CalcSphere.

What makes your product unique?

CalcSphere's answer:

  • Zakat Calculator with Pakistani Fatwa — The only free Zakat calculator following the silver nisab ruling of Mufti Taqi Usmani (Fiqhi Muqalat Vol 1, Page 31) and Darul Uloom Karachi. Silver nisab is pre-selected by default for mixed assets.

  • Multi-currency support with live rates — All finance calculators support PKR, USD, EUR, GBP, AED and 7 more currencies with live exchange rates from open.er-api.com

  • 70+ calculators in one place — Finance, health, math, construction, unit converters and date tools all under one clean interface

  • Construction calculators for Pakistan — Concrete volume, bricks, paint, tiles, steel weight and construction cost per marla — built for Pakistani builders and engineers

  • 100% free, no sign-up, no ads blocking the calculator — All calculations run locally in your browser. No data is stored or sent to any server.

  • Perfect PageSpeed scores — 100/100 Performance, 100/100 SEO, 100/100 Best Practices on Google PageSpeed Insights

Why should a person choose your product over its competitors?

CalcSphere's answer:

  • No clutter — Unlike calculator.net and rapidtables.com, CalcSphere puts the calculator first with no pop-ups, no distracting ads blocking the tool, and instant results

  • Mobile-first design — Built with Next.js 14 and Tailwind CSS, CalcSphere loads in under 1 second on mobile (LCP 1.3s) — faster than most competitor sites

  • Dark and light mode — Clean modern UI with full dark mode support unlike most legacy calculator sites

  • Dropdown inputs — No need to type unit abbreviations manually — all unit converters use dropdown selection

  • Rich explanations — Every calculator includes a "What is" section, step-by-step how-to guide, pro tips, and real-world use cases — not just a bare calculator

  • Pakistan-specific tools — Zakat calculator, construction cost per marla, PKR salary calculator and EMI calculator built for Pakistani users — not available on international competitors

How would you describe the primary audience of your product?

CalcSphere's answer:

CalcSphere serves four main audiences:

  • Pakistani users — Professionals, students and homeowners calculating EMI, Zakat, construction costs, salaries and inflation in PKR

  • UK and international business users — Small business owners calculating business loan repayments, VAT, stamp duty and retirement planning

  • Students and academics — Math and science students using percentage, GPA, quadratic solver, square root and fraction calculators

  • Health and fitness enthusiasts — People tracking BMI, calorie deficit, body fat, ideal weight and running pace

CalcSphere is used in 80+ countries with strongest traffic from Pakistan, United Kingdom, United States, Australia, South Africa and Malaysia.

What's the story behind your product?

CalcSphere's answer:

CalcSphere was built out of frustration with existing calculator websites — most are cluttered with ads, slow to load, and don't serve non-US audiences well.

The goal was simple: build the fastest, cleanest, most accurate free calculator website that works for everyone — from a Pakistani homeowner calculating construction costs to a UK small business owner planning a loan.

The Zakat calculator was a particularly important addition. Most online Zakat calculators use incorrect nisab values or don't explain which scholarly standard they follow. CalcSphere's Zakat calculator is built on the verified fatwa of Mufti Taqi Usmani (Fiqhi Muqalat Vol 1, Page 31) and defaults to silver nisab for mixed assets — making it the most accurate free Zakat calculator available online.

Built with Next.js 14, Tailwind CSS and deployed on Vercel, CalcSphere launched in April 2026 and achieved 100/100 Google PageSpeed scores on both mobile and desktop.

Who are some of the biggest customers of your product?

CalcSphere's answer:

  • CalcSphere is a free tool used by individual users worldwide — not a B2B SaaS product with named customers

  • Users include students, homeowners, small business owners, construction contractors, financial planners and Muslim professionals calculating Zakat

  • Active users in 80+ countries including Pakistan, United Kingdom, United States, Australia, India, South Africa, Malaysia and Bangladesh

Which are the primary technologies used for building your product?

CalcSphere's answer:

  • Next.js 14 (App Router) — React framework for server-side rendering and static generation
  • Tailwind CSS — Utility-first CSS framework for responsive design
  • Vercel — Deployment and hosting with global CDN
  • open.er-api.com — Live currency exchange rates API
  • JSON-LD Schema — Structured data for Google rich results (WebApplication, FAQPage, BreadcrumbList, HowTo)
  • Google Analytics 4 — Traffic and engagement tracking
  • Porkbun — Domain registrar for calcsphere.org

User comments

Share your experience with using Apache Struts and CalcSphere. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Apache Struts no reviews yet
CalcSphere no reviews yet

We have no reviews of CalcSphere yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Apache Struts 2 mentions
CalcSphere 0 mentions

Tracking CalcSphere since Jun 2026.

Alternatives to Apache Struts and CalcSphere

When comparing Apache Struts and CalcSphere, you can also consider the following products.

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