Xposure - ND Calculator

iPhone / Photo et vidéo

Xposure – ND Calculator for Long Exposure Photography

Master long exposure photography with the ultimate ND filter calculator app.

Xposure is designed for photographers who love creative control and stunning results. Whether you're shooting silky waterfalls, smooth cloud streaks, or ghost-free architecture, Xposure takes the guesswork out of ND filter use.

Xposure offers three powerful tools to plan your perfect exposure, every time.

REAL-TIME LIGHT METER

Turn your iPhone into a professional light meter. Measure any scene and get instant exposure calculations — no more guessing your base shutter speed.

• Real-time shutter speed readings using your iPhone's camera
• Set ISO and aperture to match your camera settings
• Calculated shutter speed updates live as you meter
• Capture and save scenes to your Scene Log with one tap
• Each capture stores exposure data, location, and weather conditions
• Send your base exposure directly to the ND Calculator with a single tap
• Seamlessly integrated workflow — meter, calculate, and time your long exposures all in one app

EFFECTS-BASED ND FILTER CALCULATOR

Instead of starting with the filter you have, start with the effect you want. Xposure lets you choose your desired creative outcome—like smoothing water or creating dreamy skies—and calculates the exact ND filter strength you need.

• Select from visual effect categories: Water Effects, Cloud Movement, Daytime Architecture, and more
• Automatic calculation of recommended ND filters based on your base shutter speed
• Filter stacking options for photographers with multiple ND filters
• Fine-tuned for accuracy, even in challenging conditions
• Instantly transfer your results to the ND Calculator with one tap—automatically set up your filter configuration and start timing

TRADITIONAL ND CALCULATOR

Already know your ND filter strength? Use the classic mode:

• Enter your base shutter speed and filter strength (e.g., ND8, ND64, ND1000)
• Get your adjusted exposure time instantly
• Supports filters from 1 stop to 20 stops
• Perfect for long exposures over 30 seconds with Bulb Mode

LIVE ACTIVITIES FOR HANDS-FREE TIMING

Track your long exposure countdown without unlocking your phone:

• Lock Screen Widget – See your countdown timer, progress ring, base exposure, and filter info right on your Lock Screen
• Dynamic Island – On iPhone 14 Pro and later, monitor your timer from anywhere with compact and expanded views
• Completion Alert – Get notified the moment your exposure is complete
• Floating Timer Widget – Switch tabs freely while a compact circular indicator keeps your countdown visible

FULLY CUSTOMISABLE

• Dark Mode support
• 10 accent colors including Sky, Pink, Grey, and Mint
• Beautiful circular color picker with haptic feedback
• Custom Shutter Speed mode for Effects Calculator
• Intuitive, minimalist layout for easy use in the field

BUILT-IN LEARNING HUB

New to ND filters? Learn how and when to use them with our in-app guides:

• ND filter photography tips for landscapes, waterfalls, skies, and urban shots
• Step-by-step tutorials on using ND filters for different effects
• Advice on gear setup, including tripods, remotes, and Bulb Mode shooting
• Beautifully polished interface with parallax images and smooth animations

APPLE WATCH SUPPORT

• ND calculator available on Apple Watch
• Set exposure, select filter, get results instantly
• Timer syncs seamlessly between iPhone and Watch

PERFECT FOR

• Landscape photographers
• Long exposure enthusiasts
• Filter-based photography workflows
• ND filter beginners & professionals

Xposure makes planning long exposure shots simple — so you can focus on capturing the perfect frame.

Quoi de neuf dans la dernière version ?

Introducing the Real-Time Light Meter

We're excited to introduce our most requested feature — a fully integrated Light Meter that transforms your iPhone into a professional exposure metering tool.

Measure Light Instantly
Point your camera at any scene and get real-time readings with calculated shutter speeds. Set your preferred ISO and aperture to match your camera settings, and watch the exposure update live.

Capture & Save Scenes
Save your metered scenes to the Scene Log with a single tap. Each capture stores your exposure settings, EV reading, location, and current weather conditions — perfect for planning your next shoot or keeping a record of lighting conditions.

Seamless ND Calculator Integration
Found your base exposure? Send it directly to the ND Calculator with one tap. The Light Meter and ND Calculator work together seamlessly, making it easier than ever to calculate long exposure times with your ND filters.

New Onboarding Experience

We've completely redesigned the onboarding flow for all three calculators. New animated guides walk you through each feature step-by-step, helping you get the most out of Xposure from your very first launch.

New Learn Section

Added comprehensive guides on using the Light Meter effectively, including tips on metering techniques and getting accurate readings in different lighting conditions.

Improvements & Fixes

• Improved light mode support across the app
• Enhanced UI responsiveness and animations
• Various bug fixes and performance improvements

Thank you for using Xposure! We'd love to hear your feedback — please leave a review if you're enjoying the app.