StopStack: ND Exposure

StopStack: ND Exposure is a paid, local-first filter and exposure workspace for cinematographers, camera assistants, photographers, and production crews. Enter ambient light reduction, frame rate, shutter angle, current and target aperture, and ISO. StopStack calculates shutter speed, exposure compensation, and the corrected ND target. Select filters from a practical case, see total stops and optical density, and confirm the remaining balance instantly. Save named packs with project, scene, filter combination, exposure settings, and stacking notes. Export a clean filter report for the camera team. No login is required. The app has no subscription, in-app purchase, ads, analytics, tracking, cloud sync, camera access, photo library access, or developer-server upload. Packs remain on device and files leave the app only when you explicitly export them.