EV Calc
Exposure difference calculator
₹ 49 · Designed for iPad. Not verified for macOS.
Change shutter, aperture, ISO or ND and see the exposure difference from your reference in stops. A landscape exposure calculator with shutter angle support.
EV Calc shows, at a glance, how much a change in your camera settings affects brightness, measured in stops.
Store your reference exposure with "SET", then turn the shutter, aperture, ISO and ND wheels. The difference from your reference appears large at the center of the screen, such as "+0.7" or "-1.3". Use it as a guide for how much to compensate after adding an ND filter or changing aperture or ISO.
KEY FEATURES
• Four wheels for shutter, aperture, ISO and ND filter
• "SET" stores your reference exposure and shows the difference in stops (positive is brighter, negative is darker)
• Color coding: your reference value in green, brighter options in orange, darker options in blue
• Reference EV and current EV are always visible
• Shutter angle shown like "1/48 (180°)". Choose the frame rate from 23.98, 24, 25, 29.97, 30, 50, 59.94, 60 or 120 fps, or turn the display off
• ISO step: 1 stop, 1/2 stop or 1/3 stop
• ND filter unit: density (such as 0.3), ND number (such as ND8) or stops (such as 3 stops)
• Remembers your last settings and resumes where you left off
• Landscape-only, dark-mode interface that is easy to read on set
• No account and no network connection required
NOTE
Displayed exposure differences and EV values are theoretical. Actual exposure may differ depending on your camera and lens. Please use them as a guide.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Fixed ND value is not incorrect over ND 64
The developer, Akihiro Sakai, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Akihiro Sakai
- Size
- 459.8 KB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © Akihiro Sakai/Sakai Filmworks, 2026
