ShutterMeter
Film camera shutter tester
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Keep a shutter history with three-reading tests, health maps, JSON backups and CSV export. Microphone mode supports 1 second to 1/60 second.
Has your old camera's shutter slowed down? ShutterMeter uses your iPhone's microphone to analyze the sounds of a mechanical shutter and estimate the interval between opening and closing. Compare it with the selected speed, check repeatability, and keep a test history for each camera.
Repeat each speed three times
Choose a camera and speed, then follow the measurement flow. Save three Clear signal results before moving to the next speed. Results with complex signals are marked separately and do not count toward the health map.
Shutter health map
See the median deviation and spread of the latest three clear results at each speed, along with how many speeds you have tested. Find gaps or speeds that need another check, then share a text report through the system share sheet. The report is a shooting and maintenance reference, not a calibration certificate.
Archive backup and CSV export
Export camera details and measurements as a JSON backup. On another iPhone, choose the file, preview new and duplicate items, then confirm the merge. Items with the same identifiers keep their local versions; existing records are not overwritten. Export CSV files to view raw timings, UTC timestamps and signal grades in a spreadsheet. Exported measurements are diagnostic references, not calibration certificates.
For an offline export, choose On My iPhone > this app's folder > Exports in Files. The folder may be named ShutterMeter or 快门测速仪, depending on language. This app folder is part of the app's sandbox and is deleted when you delete the app. Save important backups to iCloud Drive or another location outside this app folder; those independent copies survive deletion of ShutterMeter.
Camera log
Search by camera name or notes, and edit details without losing measurements. Create a profile for each camera and browse measurements and deviation trends by speed. Save results without a camera to Unfiled and assign them later. Clear signal results include exposure compensation guidance. Your local records remain available to view.
Supported speeds
This version provides microphone measurement for 11 nominal speeds from 1 second to 1/60 second, including the vintage 1/5, 1/10, 1/25 and 1/50 settings. Camera mode is not enabled. Measurement at 1/100 and faster is not supported.
ShutterMeter is an audio analysis aid. Its accuracy across all supported speeds has not been validated against a physical shutter tester. Clear signal describes how well the sound events can be distinguished in that recording; it is not an accuracy certification. Mirror slap, background noise and shutter design can affect the result. Repeat the test before using a result as a shooting reference. Not every mechanical shutter will produce a usable result.
Designed for iPhone
The colorful interface supports Dark Mode, Dynamic Type and VoiceOver, with clear controls to save, repeat, finish a test run and close sheets.
Data and purchase
Audio recording and analysis take place on your iPhone. The app does not automatically upload measurement data. When you share a report or export a file, the selected data goes to the app or file service you choose. System device backups may also include local records. Archive backups do not include audio, purchase receipts or free-measurement counts. Use Restore Purchases to recover an existing purchase on another phone. Purchases and restoring purchases require an App Store connection.
Your first 10 measurements that produce a result are free. Attempts that do not detect usable shutter sounds do not use a free measurement. A one-time purchase unlocks unlimited measurements, with no subscription or ads.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Export camera profiles and measurement history as a JSON backup.
Preview new and duplicate items before merging a backup. Existing local records, purchases and free-measurement counts are unchanged.
Export raw timings and signal grades as CSV for use in spreadsheet apps.
Save offline through Files to this app's Exports folder. That folder is deleted with the app; keep important backups outside the app folder.
Search camera names and notes, and edit profiles without losing their test history.
Microphone mode still supports 1 second to 1/60 second. Camera mode remains disabled.
The developer, 正平 孙, 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
- Seller
- 正平 孙
- Size
- 3.3 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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 Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Zhengping Sun