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WeekLeft VS WeekIsIt

Compare WeekLeft VS WeekIsIt and see what are their differences

WeekLeft

Free calculator showing exactly how many weeks are left in the year: days remaining, current week number, work weeks, and year completion percentage.

Rating
0 reviews
Alternatives Is it good?
WeekIsIt

Find the current week number, what week of the year it is, an ISO week calendar and instant date converter. Updated daily.

Rating
0 reviews
Alternatives Is it good?
Castmint
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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?

Online Calculators popularity
100% vs 0%
alternatives listed
6 vs 12

Base details

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

WeekLeft
WeekIsIt
Website weekleft.com weekisit.com
Company — Startup from Switzerland · 1 - 9 employees · 2026
Listed in
Online Calculators Time Calculator Date Calculator
Calendar Productivity Developer Tools Time Tracking +1

About WeekLeft and WeekIsIt

In their own words, as submitted to SaaSHub.

WeekLeft
WeekIsIt

No description of WeekLeft yet.

WeekIsIt is a simple tool for anyone who works with week numbers. Instantly see the current ISO week, convert dates to weeks, explore the yearly week calendar, and share accurate week references with your team. Lightweight, free, and updated daily.

Read more about WeekIsIt

Features and specs

What each product offers, as listed by its team.

WeekLeft 0 features
WeekIsIt 3 features

No features have been listed yet.

  • Pregnancy week calculator
    Enter the first day of your last period to find your pregnancy week, trimester, estimated due date and key milestones.
  • Fiscal year calendar
    Find the current fiscal week for any fiscal year start, see common start dates, and learn how fiscal weeks differ from ISO weeks.
  • JSON API
    Get ISO and US week numbers as JSON. Look up the current week, any date, or any week and year. Free, no key, CORS enabled.

Analysis

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

WeekLeft
WeekIsIt

No analysis of WeekLeft yet.

Overall verdict

  • WeekIsIt.com is a good, no-frills tool for quickly checking the current ISO week number, offering fast and accurate results without unnecessary complexity.

Why this product is good

  • Provides instant, accurate week number information based on standard ISO calendar rules
  • Simple, clean interface with no clutter or distracting ads
  • Loads quickly and requires no sign-up or installation
  • Free to use for anyone needing quick week reference
  • Useful for cross-referencing with business, planning, or academic calendars that use week numbers

Recommended for

  • Professionals who need to reference week numbers for project planning or reporting
  • Students or educators tracking academic calendar weeks
  • Businesses using ISO week numbering for scheduling or logistics
  • Anyone needing a quick, ad-free tool to check the current week of the year

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
WeekLeft
WeekIsIt
100% 100%
Online Calculators
0% 0%
0% 0%
Productivity
100% 100%
100% 100%
Date Calculator
0% 0%
0% 0%
Calendar
100% 100%

Questions & Answers

As answered by people managing WeekLeft and WeekIsIt.

Which are the primary technologies used for building your product?

WeekLeft's answer

Next.js, React, Vercel

What makes your product unique?

WeekLeft's answer

WeekLeft keeps every calculator focused on one question and answers it instantly. There are no no pop-ups and no cluttered pages. Business day calculations skip weekends automatically, and every result is easy to read on both mobile and desktop.

Why should a person choose your product over its competitors?

WeekLeft's answer

Big sites like timeanddate.com cover hundreds of topics, so finding the right tool can take time. WeekLeft is built only for date and time math, so each calculator is quick to find, simple to use and loads fast. It is completely free, and each tool comes with a short guide explaining how the calculation works.

How would you describe the primary audience of your product?

WeekLeft's answer

People who need quick date answers in daily life and work: HR and payroll teams counting business days, project managers planning deadlines, students tracking exam dates, and anyone counting down to an event or checking how many weeks are left in the year.

What's the story behind your product?

WeekLeft's answer

WeekLeft started as a small WordPress site with a few calculators. As it grew, it became slow and hard to maintain, so I rebuilt it from scratch in Next.js. During the rebuild I audited the whole site and fixed around 200 issues, including calculation errors, SEO problems and page speed. The goal now is simple: build the most reliable and easy to use date calculators on the web.

User comments

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Alternatives to WeekLeft and WeekIsIt

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