Week Number

Week Number

By Sindre Sorhus

Week Number is a utility app for macOS and Android that displays current ISO or Gregorian week numbers via widgets and menu bar items.

The App DNA

What makes this app unique?

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.

For Professionals and individuals who require frequent reference to ISO or Gregorian week numbers for scheduling.

What does it look like?

Key features

Menu Bar Displaystandard

Displays the current week number directly in the macOS menu bar

Home Screen Widgetstandard

Displays week number on Android home screens with adjustable size, background color, and transparency

How much does it cost?

freeFree

The app is distributed as a free utility without IAP or subscription gates.

Velocity

Active developmentShow more...

5 versions in history. Development pace: active.

See all version history

Who built it?

Sindre Sorhus

13+ apps tracked · Utilities

Any Text · WidgetsAny Text · WidgetsAikoAikoFavorites WidgetFavorites WidgetQuick LaunchQuick LaunchSharefulSharefulActionsActionsGifskiGifskiHEIC ConverterHEIC ConverterSystem Color PickerSystem Color PickerOne ThingOne ThingPlashPlashRefined GitHubRefined GitHub
Explore the full publisher profile

User Sentiment

What do users think recently?

Review voice lately leans excited.

How are ratings & reviews evolving?

Google Play
4.86 · 261
App Store
0.00 · 0

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for Week Number

How's the Utilities market?

The app maintains a 4.86 rating on Android with 261 reviews, signaling high satisfaction for its specific utility niche. Its lack of monetization or aggressive growth features keeps it as a secondary utility rather than a primary market competitor.

Read the market outlook

The rivals identified

Widget Wizard
Widget Wizardactive nemesis

By Ahmed El-Khuffash

This is the only direct competitor in the Utilities category focused specifically on widget-based information display.

  • Offers a specialized widget-first interface that mirrors this app's core utility value proposition.
  • Maintains a singular focus on home screen utility, avoiding the bloat of full-featured calendar suites.
Week Number vs Widget Wizard

Unlock the deeper market read.

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The Analyst's Read

Key takeaways for Week Number

Where is it heading?

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.

The SWOT

Core Strengths
  • Minimalist design reduces cognitive load for quick date lookups
  • Cross-platform widget availability ensures consistent utility access
Critical Frictions 2 weaknesses inside
Growth Levers
  • Integration with third-party calendar APIs could transition the app into an active scheduling tool
Market Threats 1 threat identified

Next best moves

1 Invest

Integrate third-party calendar sync because users require active scheduling, not just passive viewing → increase daily utility frequency.

The counter-intuitive read

The app's lack of monetization is its primary risk…

Read the full take

Feature gaps

Natural language event creation (available in Fantastical Calendar but absent here) +1

Since the last report: The intelligence report expanded from a basic utility profile to a strategic analysis, identifying the app's lack of monetization and advanced features as risks to its long-term viability.

Bottom line

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.

Unlock 2 critical frictions, 1 market threat and the analyst’s take.

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Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Week Number, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The intelligence report expanded from a basic utility profile to a strategic analysis, identifying the app's lack of monetization and advanced features as risks to its long-term viability.

shifted

Strategic Positioning Pivot

added

Formal SWOT Analysis

Cite this report

Marlvel.ai. “Week Number Intelligence Report.” Updated May 17, 2026. https://marlvel.ai/apps/week-number

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