AlphaND vs ND Exposure Calculator

AlphaND is a fast, practical ND filter calculator built for photographers who need reliable long-exposure results in the field. The app helps you convert a metered/base shutter speed into a final exposure time after adding neutral density filters. It supports both direct shutter input and an aperture/ISO-adjusted workflow, so you can calculate accurately whether you are keeping settings fixed or changing them for creative intent. Core calculation is based on exposure stops (each stop doubles time), with output rounded to standard camera shutter values for real-world usability. Alongside rounded output, you can also view exact calculated values to understand the precise timing behind each result. Key features include: - Standard ND presets with optical density labels, including common values like ND2, ND4, ND8, ND64, ND1000, and ND32000. - Quick presets for the most-used strengths (3-stop, 6-stop, 10-stop). - Manual stop adjustment for fine control. - Exposure stacking support so you can combine two ND filters and calculate total stop effect automatically. - Visual exposure scale from short to long, making it easy to see how extreme your exposure becomes at a glance. - Long-exposure helper: when results exceed 30 seconds, AlphaND recommends Bulb mode and provides an integrated countdown timer. For long exposures, AlphaND adds practical feedback cues: - Bulb warning behavior with clear visual emphasis. - Haptic/audio alerts around timer usage (depending on context/configuration). - Auto-scroll behaviour to ensure critical long-exposure controls are visible when needed. The app is designed with a clean, high-contrast interface for outdoor shooting conditions and quick one-handed use. Controls are arranged for speed and clarity, reducing friction when shooting at sunrise, sunset, bright midday scenes, seascapes, or urban motion blur. Additional utility features: - Save favorite setups for fast recall of your most-used combinations. - In-app feature guide accessible from the info icon. - Settings screen with company/contact details and App Store rating shortcut. - Support for iPhone and iPad layouts. - Built-in paywall flow with trial and full unlock path (as configured by the developer). Typical use cases: - Smoothing water while preserving scene detail. - Creating cloud streaks and motion-rich landscapes. - Extending exposure times in bright conditions. - Quickly testing different ND combinations on location without manual stop math. AlphaND is built to be a dependable “photography tool” rather than a bloated app: fast calculations, minimal clutter, and outputs you can trust when timing matters.

Prepare a long exposure without calculating each filter separately. Combine your ND filters, include supported film correction and take the result into a timer. STACK FILTERS, CALCULATE TOGETHER Choose your filters and calculate their combined effect on the exposure time. INCLUDE THE FILM CORRECTION Supported ILFORD profiles provide reciprocity correction using retained manufacturer data. Other films are not automatically interchangeable. START WITH THE PLANNED TIME Move the calculated exposure into the timer. Save a setup to reuse on your next shoot. Calculations help you plan the exposure. Background timer delivery depends on the system and any required notification permission.