Report updated May 17, 2026
Week Number
For professionals and individuals who require frequent reference to ISO or Gregorian week numbers for scheduling.
Week Number is a well-regarded utilities app that is completely free. With a 4.9/5 rating from 261 reviews, it maintains solid user satisfaction.
What is Week Number?
Week Number is a utility app for macOS and Android that displays current ISO or Gregorian week numbers via widgets and menu bar items.
Users hire this app to eliminate the manual calculation of week numbers during scheduling, providing a quick reference that standard calendar apps often bury in settings.
Current Momentum
v1.3 · 2mo ago
Active- Ships macOS 26 compatibility update.
- Improved Android widget contrast.
Active Nemesis
Widget Wizard
By Ahmed El-Khuffash
Other Rivals
Rating Pulse 🇺🇸
Recent User MoodAI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
Displays the current week number directly in the macOS menu bar
Displays week number on Android home screens with adjustable size, background color, and transparency
How much does it cost?
- Free
The app is distributed as a free utility without IAP or subscription gates.
Who Built It?
Sindre Sorhus
Equipping macOS power users and developers with lightweight, single-purpose utilities to refine their digital workflow.
Portfolio
13
Apps
Who is Sindre Sorhus?
Sindre Sorhus maintains a distinct position as a community-funded independent developer, prioritizing lightweight, single-purpose utilities over complex multi-feature platforms. The moat is built on a massive open-source footprint and institutional trust within the developer community, allowing for a donation-based model that avoids traditional monetization friction. This strategy enables the rapid deployment of niche system refinements that larger competitors often ignore as too granular for commercial viability.
Who is Sindre Sorhus for?
- MacOS power users
- Software developers
- Productivity enthusiasts seeking granular system control
- Workflow optimization
Portfolio momentum
Maintains an extremely high update frequency with 80 releases across the portfolio in the last 6 months and 96% of apps currently active.
What other apps does Sindre Sorhus make?
Any Text · Widgets
Aiko
Favorites Widget
Quick Launch
Shareful
Actions
What do users think recently?
High confidence · Latest 100 of 261 total reviews analyzed
What is the recent mood?
Recent user voice shows a excited sentiment.
What is the competitive landscape for Week Number?
How's The Utilities Market?
Market outlook for this category
Available very soon
The rivals identified
The Nemesis
- -
Offers a specialized widget-first interface that mirrors the target app's core utility value proposition.
- -
Maintains a singular focus on home screen utility, avoiding the bloat of full-featured calendar suites.
Peers
Provides extensive aesthetic customization options that far exceed the target app's basic visual configuration settings.
Leverages a massive user base to drive network effects and high-frequency updates across the productivity category.
Integrates directly into the iOS system architecture, providing zero-latency performance and native system-level widget support.
Eliminates the need for third-party installations by offering essential calendar data as a pre-installed utility.
Utilizes natural language processing for event creation, positioning itself as a high-utility tool for professional power users.
Offers a cross-platform synchronization engine that ensures consistent data availability across all Apple devices and platforms.
Calendar ·
★4.6 (58.9K)BUCKET LIST LABS S.L.
🚀An adjacent productivity tool that competes for the same screen real estate by offering a simplified calendar view.
Focuses on a minimalist design language that appeals to users seeking a distraction-free calendar experience.
Provides a streamlined alternative to complex calendar apps by prioritizing essential date-based information at a glance.
The outtake for Week Number
Strengths to defend, gaps to attack
Core Strengths
- Minimalist design reduces cognitive load for quick date lookups
- Cross-platform widget availability ensures consistent utility access
Critical Frictions
- Zero revenue model limits reinvestment capacity
- Lack of advanced scheduling features restricts user base
Growth Levers
- Integration with third-party calendar APIs could transition the app into an active scheduling tool
Market Threats
- OS-level native calendar updates frequently render single-purpose utilities obsolete
What are the next best moves?
Integrate third-party calendar sync because users require active scheduling, not just passive viewing → increase daily utility frequency.
The app is currently a secondary utility; calendar integration would make it a primary productivity tool.
Trade-off: Deprioritize visual customization updates for the Android widget.
A counter-intuitive read
The app's lack of monetization is its primary risk, as it prevents the development of the advanced features needed to defend against native OS calendar updates.
Feature Gaps vs Competitors
- Natural language event creation (available in Fantastical Calendar but absent here)
- Cross-platform synchronization engine (available in Fantastical Calendar but absent here)
Key Takeaways
Week Number succeeds as a minimalist utility, but its lack of advanced features limits its growth, so the PM should pivot toward calendar integration to increase user retention.
Where Is It Heading?
Stable
The market for single-purpose date utilities is consolidating as OS-level calendar widgets become more capable. Week Number remains stable due to its simplicity, but it must add active scheduling features to avoid being replaced by native system tools.
Recent updates focused on macOS compatibility and widget contrast, indicating the app remains in a maintenance-focused utility lifecycle.