Rina Katrina
Color Blindness Test Ishihara
Snapshot
Publisher DNA
What defines Rina Katrina?
AI intelligence is not yet available for Rina Katrina. The portfolio data below is up to date.
Portfolio
What does Rina Katrina ship?
Apps
2 apps analysed
- Focused, lightweight UX specifically tailored for Ishihara-based color blindness screening
- The educational content provides comprehensive material that helps students master the subject matter effectively
- Frequent advertisements during study sessions interrupt the learning flow and consume valuable preparation time
Single-market publisher, every app ships only to United States.
Based on 2 of 2 apps with localized market data · last scanned .
Americas (1)
- United States2 / 2
Core markets (2/2 apps)
User Sentiment
How do users feel about their apps?
0
Positive apps
0
Neutral / mixed
1
Negative apps
30/100
Avg sentiment score
Rivals
Who does Rina Katrina compete with?
The rivals identified
Nemeses(1)
This app is a direct nemesis because it dominates the vision-testing category with a massive user base and a feature set that encompasses both color blindness and general visual acuity.
Contenders(1)
This contender competes by positioning itself as a professional-grade, optician-gated screening tool that targets the high-accuracy segment of the vision market.
Same space(2)
This peer competes by providing specialized utility for clinical environments, focusing on the hardware-software interface of vision testing.
This peer competes by offering specialized hardware-integrated vision tracking services that provide more utility than a simple software-only test.
New entrants(2)
This newcomer is a threat due to its aggressive release cadence and focus on professional data integration.
This newcomer directly challenges the target app's core value proposition by offering specific Ishihara plate testing and PDF reporting.
