Vitamin K is a medical utility app for patients on anticoagulants, providing a USDA-based database of 930+ foods. It differentiates itself through a unique 9-color risk scale for quick nutrient identification. While it serves a critical niche, the app faces significant stability issues and competition from more modern, integrated platforms like ClotKeeper.
Product velocity
Steady
Daily rank 🇺🇸
#95
Medical · paid
Sentiment
3.0
10 reviews
Nemesis
ClotKeeper
The App DNA
What makes this app unique?
For Individuals prescribed blood-thinning medications like Warfarin or Coumadin who need to monitor and manage their dietary Vitamin K intake.
What does it look like?
Key features
Comprehensive database of over 930 foods with specific Vitamin K content in mcg, sourced from USDA data.
Visual indicator system (9-color scale) to quickly identify the Vitamin K level of food items.
Record daily food intake with the ability to edit servings, dates, and copy records between days.
Allows users to input and save custom food servings not found in the standard database.
Search functionality supporting two-word phrases with logical operators (AND, OR, BUT NOT).
How much does it cost?
The developer utilizes a straightforward, one-time purchase model for the iOS app, positioning it as a specialized medical utility rather than a subscription-based service.
Velocity
Steady developmentnew contentsocial featuresinternationalizationShow more...
The app has transitioned from a multi-year period of inactivity to a steady development pace with the release of version 25.12V5.1-v231 in December 2025. This update focused heavily on content expansion through eBooks and social engagement via global communities. While the previous update was in 2019, the current cadence suggests a renewed focus on internationalization and feature depth.
Who built it?
James Hollender
3 apps tracked · Medical
All Cocktail and Drink Recipes
DASH Diet Recipes OfflineUser Sentiment
What do users think recently?
The recent review mood reads mixed. Users appreciate utility for vitamin k tracking and offline functionality.
How are ratings & reviews evolving?
What users say, by theme
- Utility for Vitamin K Tracking
- Offline Functionality
Unlock 1 more frustration theme, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Vitamin K
How's the Medical market?
The rivals identified
By ClotKeeper LLC
ClotKeeper is the most direct functional rival, specifically designed for patients on anticoagulants to track both INR levels and dietary Vitamin K intake.
- Integrated INR tracking alongside dietary logging for a more holistic anticoagulant management view
- Graphing capabilities to visualize the correlation between Vitamin K intake and INR fluctuations
- Cloud synchronization features which are absent in the analyzed app's legacy architecture
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Vitamin K
Where is it heading?
- Android version updated Dec 2025 — indicates active maintenance on at least one platform.
- iOS version last updated Dec 2019 — legacy status creates compatibility risks.
- High-frequency crash reports in sentiment data — significant technical debt impacting retention.
The SWOT
- Highly granular 9-color risk scale
- Advanced search with logical operators
- Full offline functionality
- USDA-sourced data integrity
- Integration of INR tracking
- Barcode scanner implementation
- Migration of users to the newer 'INR Assist' platform
Next best moves
Prioritize iOS stability patch
+ 2 more prioritized movesFeature gaps
Integrated INR tracking (available in ClotKeeper) +3
Bottom line
Vitamin K is a high-utility legacy app currently suffering from critical technical debt. While its color-coded database remains a strong differentiator, the lack of INR tracking and persistent crashing on iOS makes it vulnerable to modern competitors like ClotKeeper.
Unlock 4 critical frictions, 3 market threats, 2 more prioritized moves and the analyst’s take.
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