Report updated Apr 18, 2026
Vitamin K
For individuals prescribed blood-thinning medications like Warfarin or Coumadin who need to monitor and manage their dietary Vitamin K intake.
Vitamin K is an established medical app that is a paid app. With a 3.0/5 rating from 10 reviews, it shows polarized user reception. Users particularly appreciate utility for vitamin k tracking, though app stability and crashing remains a common concern.
What is Vitamin K?
Current Momentum
v25.12V5 · 4mo ago
SteadyVitamin K recently introduced a brand-new eBooks section and Worldwide Communities for global user interaction. This major update marks a significant return to development after a long hiatus.
Active Nemesis
ClotKeeper
By ClotKeeper
Other Rivals
7-Day Rank Pulse 🇺🇸
MedicalRating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
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What Are The 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?
- One-time purchase of $2.99 for the iOS version
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.
Who Built It?
James Hollender
Providing offline-accessible educational and dietary resources to help users manage specific health goals and language learning. Focused on utility-driven content for niche self-improvement needs.
Portfolio
3
Apps
What other apps does James Hollender make?
Explore the full James Hollender report
Portfolio breakdown, audience, momentum, and every app published by James Hollender.
What do users think recently?
High confidence · 10 reviews analyzed
How did the latest release land?
What is the recent mood?
Recent user voice shows a mixed sentiment. Users appreciate utility for vitamin k tracking and offline functionality, but report app stability and crashing and poor usability and navigation.
Limited review volume (10 reviews). Sentiment analysis will deepen as more data lands.
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Vitamin K?
How's The Medical Market?
How does it evolve in the Medical market?
Rank progression
2 active rankings tracked — 30-day window
The rivals identified
The outtake for Vitamin K
Strengths to defend, gaps to attack
Core Strengths
- Highly granular 9-color risk scale
- Advanced search with logical operators
- Full offline functionality
- USDA-sourced data integrity
Critical Frictions
- High-frequency crashing on iOS
- Legacy iOS codebase (2019)
- Unintuitive intake logging navigation
- Lack of cloud synchronization
Growth Levers
- Integration of INR tracking
- Barcode scanner implementation
- Migration of users to the newer 'INR Assist' platform
Market Threats
- Modern nutrition trackers (Cronometer) with superior UX
- Competitors offering integrated medication reminders
- Platform obsolescence due to lack of iOS updates
What are the next best moves?
Prioritize iOS stability patch
App stability/crashing is the #1 complaint theme, leading to a 'Mixed' mood and 3.0-star rating.
Integrate INR tracking functionality
Nemesis (ClotKeeper) wins by offering a holistic view of both INR and Vitamin K, which is the primary clinical need.
Streamline the intake logging UI
Users reported the app is 'difficult to use' for daily recording, which is a medium-frequency usability complaint.
Feature Gaps vs Competitors
- Integrated INR tracking (available in ClotKeeper)
- Cloud synchronization (available in ClotKeeper)
- Medication reminders (available in ClotKeeper)
- Barcode scanner (available in MyNetDiary)
Key Takeaways
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.
Where Is It Heading?
Mixed Signals
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.