We're here to help. Find answers below or reach out directly.
Email: support@eyeiohealth.com
Response time: Within 24 hours on business days.
Download NItMeter from the App Store and tap "Start Free Trial." You'll get full access to all features for 7 days. Cancel anytime before the trial ends and you won't be charged.
Go to Settings → [Your Name] → Subscriptions on your iPhone. Find NItMeter and tap "Cancel Subscription." Your access continues until the end of the current billing period.
NItMeter supports iPhone 12 Pro and later models. The app uses Apple's advanced camera system for accurate luminance measurement.
NItMeter delivers professional-grade accuracy using your iPhone's camera and our proprietary algorithm. Relative measurements and Delta Nit comparisons are consistently reliable. For absolute accuracy, device calibration may be needed.
Yes. Use the Professional Insight feature to export measurements in PDF or CSV format, including Nit, EV, ftL, and CCT values with photos and metadata.
NItMeter measures luminance (Nits/cd/m²) — screen and surface brightness. LuxMeter measures illuminance (lux) — ambient light falling on a surface. HDR combines exposure metering for HDR content creation. Each is designed for different professional workflows.
Email us at support@eyeiohealth.com with a description of the issue, your iPhone model, and iOS version. Screenshots are always helpful!
Refunds are handled through Apple's App Store. You can request a refund through Apple's support page. We're also happy to help resolve any issues — please contact us first.