EPA's SunWise UV Index vs its rivals

Side-by-side comparison against EPA's SunWise UV Index's closest competitors — identity, store metrics, ratings & sentiment, and strategic intel.

SkyGuard®
Contender
My PurpleAir
Contender
Core Identity
DeveloperUnited States Environmental Protection Agency (USEPA)Air Matters Network Pty LtdAccuWeather Enterprise Solutions, Inc.Forum Communications CompanyPaul DemersGenial LLCNexstar BroadcastingLIN Television CorporationLIN Television CorporationAmbient,LLC
CategoryWeatherWeatherUtilitiesWeatherWeatherWeatherWeatherNewsWeatherWeather
PlatformiOSiOS, AndroidiOS, AndroidiOSiOSiOSiOS, AndroidiOS, AndroidiOS, AndroidiOS, Android
Store Metrics
Rating3.1 / 54.6 / 54.8 / 54.7 / 54.2 / 54.7 / 53.9 / 54.7 / 52.9 / 51.6 / 5
Ratings Count672,5061483108963840447120
PriceFreeFreeFreeFreeFreeFreeFreeFreeFreeFree
Release DateSep 22, 2011Nov 13, 2011Oct 1, 2018Apr 14, 2020Jan 22, 2022Sep 4, 2012Oct 24, 2012Jul 20, 2011Nov 13, 2014Oct 24, 2016
Last UpdatedDec 13, 2022Oct 28, 2025May 6, 2026May 7, 2026Jan 3, 2026Sep 22, 2025Dec 18, 2023Mar 5, 2026Mar 25, 2026Dec 8, 2022
Sentiment & Reviews
Sentiment-negative--mixedexcellentmixed-mixedexcellent
Score-25/100--50/10085/10050/100-50/10090/100
Praises-
  • Historical air quality data tracking allows users to monitor environmental changes over several years
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  • Local air quality sensor data provides clear and simple utility for daily monitoring
  • Watch complications offer convenient access to air quality metrics without opening the phone
  • Real-time solar event notifications provide critical safety awareness for emergency preparedness and daily risk management
  • Local meteorologist expertise
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  • General user satisfaction with the application performance and overall utility
Complaints-
  • Home screen widget fails to refresh or display current data after the latest update
  • Transition to a subscription model renders previous one-time purchases unusable for long-term users
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  • Unreliable connection to air quality sensors prevents consistent real-time measurement for users
  • Complex navigation and icon-heavy interface design create barriers for users attempting to access specific historical data
  • UI datedness
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Requests-
  • Improved widget reliability to ensure real-time air quality data is visible without opening the app
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  • Simplified navigation and clearer labeling of technical metrics would improve usability for non-expert solar enthusiasts
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Strategic Intel
Strengths
  • Authoritative scientific credibility via EPA backing sustains high-trust brand positioning
  • Focus on UV-specific health risks provides a cleaner, non-commercial UX for sun-safety planning
  • Hardware-linked indoor monitoring creates high switching costs for Philips and Laser Egg users
  • Multi-standard support provides a global utility moat for international users
  • Meteorologist-verified alerts reduce false-alarm fatigue
  • Site-specific asset mapping provides high-fidelity risk mitigation
  • Enterprise-level integration supports complex organizational safety processes
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  • Local-only LAN polling ensures data privacy for sensor owners
  • Watch complication integration provides ambient data access
  • AI-processed NOAA/NASA data integration provides high-fidelity safety alerts
  • Specialized utility creates high value for emergency planners
  • Local meteorologist team provides a trusted human-centric voice during crises
  • Baron Tornado Index creates a safety-critical utility barrier
  • First Alert Weather Team branding builds regional trust
  • Localized severe weather alerts drive high-intent usage
  • Local meteorology expertise provides a trust-based barrier to entry
  • VIPIR radar integration serves as a high-utility retention mechanism
  • $35 rebate program functions as a direct migration mechanism to current hardware infrastructure
Weaknesses
  • 3.13 rating on 67 reviews indicates poor user satisfaction with the current interface
  • Lack of home screen widgets limits utility for daily, glanceable usage
  • Widget refresh failures on the latest version erode daily active usage
  • Subscription transition alienated legacy one-time purchasers
  • Gated access model prevents independent user acquisition
  • No direct in-app subscription path
  • Low review volume limits social proof
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  • Frequent sensor connection failures reported by users
  • Manual network dependency management increases user friction
  • Unintuitive icon-heavy interface design
  • Mandatory subscription gating at launch
  • 0.8-star rating gap between Android and iOS platforms
  • No offline radar functionality despite competitor availability
  • Interface design lags behind current category standards
  • No specialized environmental tracking features
  • Lacks advanced home screen widget customization
  • 2.87-star iOS rating indicates significant technical friction
  • Lack of widget customization limits daily home-screen presence
  • 1.625★ rating on iOS reflects poor user experience during the sunset phase
Pricingfreesubscriptionsubscriptionfreefreesubscriptionfreefreefreefree
MomentumZombieMaintenanceMaintenance-MaintenanceMaintenanceZombie--Zombie
Update Cadence5 versions, 3 majors/6mo, ~713d avg2 versions, ~89d avg2 versions, ~1d avg-1 versions5 versions, 1 majors/6mo, ~32d avg5 versions--2 versions, 1 majors/6mo, ~1216d avg

Compare EPA's SunWise UV Index head-to-head

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AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by EPA's SunWise UV Index, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0