StopStack

StopStack helps long exposure photographers calculate neutral density filter exposures in the field. Save the ND filters you actually carry, enter your base exposure, and quickly see the shutter time you will get from one filter or a stacked combination. Working toward a specific creative effect? Enter your target shutter time and StopStack recommends the closest stack from your kit, with practical alternatives when the exact result is not possible. Built for waterfalls, seascapes, cloud streaks, crowd removal, architecture, travel, and quick video shutter checks. Features: - ND exposure calculator for single and stacked filters - Target shutter planner using your saved filter kit - Support for stops, ND factor notation, and optical density notation - Common scenario shortcuts for long exposure work - Long exposure countdown timer - Recent calculations stored locally - English, Simplified Chinese, and Japanese in-app language options - Local-first design with no account and no tracking StopStack is a focused field tool. It does not require internet access, cloud sync, or an account.