Week Number is a single-purpose utility for tracking calendar week numbers and date ranges on iOS and watchOS.
The App DNA
What makes this app unique?
It removes the cognitive friction of calculating week-based dates for timesheets and logistics by providing a dedicated, privacy-focused reference tool.
For Professionals and planners who require quick reference to calendar week numbers for scheduling and logistics.
Key features
Shows current week number, week-based year, and date range on launch.
Toggles between ISO 8601 Monday-based and Sunday-based numbering.
Displays week information on iPhone and iPad home and lock screens.
Provides week number access directly on Apple Watch faces.
How much does it cost?
The app is distributed as a free utility with no account, ads, or tracking.
Velocity
Maintenance developmentopaqueShow more...
The app currently operates at a maintenance cadence, with only one release recorded in the analyzed window. The latest release occurred 12 days ago, but the lack of descriptive release notes suggests a focus on minor stability or performance adjustments rather than new feature development. There is no evidence of live operations or recurring content updates. Development appears to be in a stable, low-activity state.
Who built it?
User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Week Number · Calendar Weeks
How's the Utilities market?
Week Number operates as a free, privacy-focused utility in the Utilities category. Its lack of monetization positions it as a pure utility for users who prioritize privacy over feature-heavy calendar integration.
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Access the full report for freeThe Analyst's Read
Key takeaways for Week Number · Calendar Weeks
Where is it heading?
The calendar utility market is consolidating around apps that offer integrated scheduling rather than isolated reference tools. Week Number remains advantaged for privacy-conscious users, but its lack of active development leaves it exposed to feature-creep from general-purpose calendar apps.
- The maintenance-only release cadence suggests the developer is prioritizing stability over feature expansion, keeping the app in a static utility state.
The SWOT
- Privacy-first design (no tracking or accounts) reduces user friction.
- Customizable week systems (ISO 8601 vs Sunday-based) support diverse regional scheduling needs.
- Adding calendar-event integration could bridge the gap between reference and active scheduling.
Next best moves
Ship calendar-event integration because it is the top missing utility for planners → increase daily active usage.
The counter-intuitive read
The app's lack of monetization is its primary barrier to growth…
Read the full takeSince the last report: The product strategy shifted from passive maintenance to a targeted development goal of calendar-event integration. This pivot aims to transition the app from a static reference tool to an active scheduling utility.
Bottom line
Maintaining the current privacy-first, ad-free utility model preserves the app's niche appeal, but the lack of feature expansion limits its growth beyond a static reference tool.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Week Number free to use?
Does Week Number support ISO 8601 week numbering?
Can I see week numbers on my Apple Watch?
Does this app track my data?
Sources
- [1] App Store listing, source
Report last updated