Telemetry LM
Precise Camera Light Meter
Only for iPhone
$1.99 · Designed for iPhone. Not verified for macOS.
iPhone
Not a guess. A reading. Telemetry pulls real exposure data straight from your camera's sensor — no pixel-brightness estimating, no rough math.
Telemetry is a light meter that reads real exposure telemetry straight from your phone's camera hardware — actual ISO, shutter speed, and aperture, not an estimate based on how bright the preview looks.
Point it at a scene and Telemetry gives you an accurate EV reading and lux value, then works out the matching exposure settings for whatever camera you're actually shooting on — film, digital, doesn't matter. It's built to sit alongside your camera as a proper reference meter, not replace the one already in your pocket.
FEATURES
Real hardware telemetry
Exposure readings come from the camera's own sensor data, continuously updated — not a guess based on screen brightness. This is the same kind of reading a dedicated handheld meter gives you.
Aperture & shutter priority
Choose which one you want to control — set your aperture and get the matching shutter speed, or set your shutter and get the matching aperture.
Average and spot metering
Meter the whole frame, or tap anywhere on screen to spot-meter exactly the area you're pointing at.
Meter for shadows, mids, or highlights
Choose which part of the scene's brightness range you want exposed correctly. It's your call — Telemetry just does the math.
Exposure compensation
Fine-tune the reading up or down in third-stop increments.
No accounts. No ads. No tracking.
Telemetry doesn't collect any data, doesn't require sign-in, and doesn't have ads. It's a tool, not a platform.
Whether you're shooting film, running manual exposure on a digital body, or just want to understand the light you're working with, Telemetry gives you a reading you can actually trust.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, JOSHUA DANIEL HOOVER, 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
- JOSHUA DANIEL HOOVER
- Size
- 349.2 KB
- Category
- Photo & Video
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - Mac
Requires macOS 26.5 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Josh Hoover
