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Working Days Calc VS Sing App React Java

Compare Working Days Calc VS Sing App React Java and see what are their differences

Working Days Calc

Calculate business days between dates, add or subtract working days, and plan notice periods. 5 free tools, 100+ countries, no signup needed.

Rating
0 reviews
Pricing
Free
Alternatives Is it good?
Sing App React Java

React Admin Dashboard Template with Java Backend

Rating
0 reviews
Alternatives Is it good?
cobwebs.app
Tap a thing and the counter resets. A quiet, local-first day counter for the things you keep meaning to do. No account needed, no spreadsheet. 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.

Base details

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

Working Days Calc
Sing App React Java
Website workingdayscalc.com flatlogic.com
Pricing
Free
—
Platforms
Web
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Company Startup from South Africa · 1 - 9 employees · 2026 —
Listed in
Productivity Utilities Online Calculators Date Calculator +1
—

About Working Days Calc and Sing App React Java

In their own words, as submitted to SaaSHub.

Working Days Calc
Sing App React Java

WorkingDaysCalc.com gives you five free business day calculators. Count working days between two dates, add or subtract business days, work out a notice period end date, or calculate a deadline. Each calculator excludes weekends and public holidays for over 100 countries. Your result reflects...

Read more about Working Days Calc

No description of Sing App React Java yet.

Features and specs

What each product offers, as listed by its team.

Working Days Calc 4 features
Sing App React Java 0 features
  • Calculators
    5 free tools — count, add, subtract business days, notice periods, and deadlines
  • Country Coverage
    Public holidays excluded for 100+ countries via live data
  • No Signup
    Free to use with no account required
  • Print & Share
    Save, print, or copy any result instantly

No features have been listed yet.

Analysis

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

Working Days Calc
Sing App React Java

No analysis of Working Days Calc yet.

Overall verdict

  • Sing App React Java by Flatlogic is a solid, well-structured admin dashboard template that pairs a modern React frontend with a Java (Spring Boot) backend, making it a good choice for developers who want a ready-made full-stack starter kit rather than building an admin panel from scratch.

Why this product is good

  • Combines a React frontend with a Java/Spring Boot backend, giving a complete full-stack boilerplate out of the box
  • Includes pre-built UI components, charts, tables, and forms that speed up dashboard development
  • Clean and modern design that follows common admin panel UX patterns
  • Comes with authentication and basic CRUD operations already implemented
  • Good documentation and support from Flatlogic for setup and customization
  • Regularly maintained and updated to keep dependencies current
  • Affordable compared to hiring a developer to build a similar boilerplate from scratch

Recommended for

  • Developers who want a quick-start template for building admin panels or internal tools
  • Teams building SaaS products that need a Java backend paired with a React UI
  • Freelancers or agencies looking to speed up client project delivery with a pre-built dashboard
  • Startups wanting to prototype an admin interface without investing heavily in initial UI/UX design
  • Java developers who prefer Spring Boot but want a modern JavaScript frontend without building it themselves

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
Working Days Calc
Sing App React Java
100% 100%
Productivity
0% 0%
100% 100%
Utilities
0% 0%
100% 100%
Online Calculators
0% 0%
100% 100%
Date Calculator
0% 0%

Questions & Answers

As answered by people managing Working Days Calc and Sing App React Java.

What makes your product unique?

Working Days Calc's answer

Most business day calculators are built for one country. WorkingDaysCalc.com covers 100+ countries using a live public holidays database, so the result changes based on where you are. Five separate calculators handle the most common tasks: counting days between two dates, adding or subtracting business days, calculating a notice period end date, and finding a deadline. No signup, no account, no download.

Why should a person choose your product over its competitors?

Working Days Calc's answer

The main alternatives are either US-only, buried inside a larger tool, or so cluttered with ads that finding the result takes longer than counting by hand. WorkingDaysCalc pulls live public holiday data for each country rather than using a hardcoded list that goes stale. The five calculators cover the specific tasks people search for rather than forcing one generic tool to do everything.

How would you describe the primary audience of your product?

Working Days Calc's answer

HR teams checking notice periods and last working days. Payroll teams confirming payment dates. Legal teams counting court or contract deadlines. Project managers working out delivery windows and milestones. The site gets traffic from the US, UK, Australia, South Africa, and Canada, which reflects where business day calculations come up most in employment law and contract work.

What's the story behind your product?

Working Days Calc's answer

I got a notice period calculation wrong. Counted four weeks forward, told someone their last working day, then spotted a public holiday sitting in that range. Wrong date. In employment and legal contexts, that error has real cost. I looked for a tool that handled multiple countries with accurate holiday data and found nothing that did it cleanly. So I built five calculators that do exactly that and launched the site in June 2026.

Which are the primary technologies used for building your product?

Working Days Calc's answer

WordPress with the Astra theme handles the site structure. Rank Math manages SEO. WPCode handles custom schema and JavaScript snippets. LiteSpeed Cache runs on Hostinger shared hosting. The calculator logic is vanilla JavaScript. Country dropdowns use TomSelect. Public holiday data comes from the Nager.Date API, which covers 100+ countries and requires no API key.

Who are some of the biggest customers of your product?

Working Days Calc's answer

WorkingDaysCalc is a free public tool with no accounts or paid plans, so there are no named customers to list. It gets used by HR professionals, payroll teams, legal staff, and project managers across the US, UK, Australia, South Africa, and Canada.

User comments

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