Spektral Mobile
Music
£14.99 · Designed for iPad. Not verified for macOS.
Spektral is a professional real-time audio analyser for sound engineers. Ring out a PA, find the frequency that is howling, and keep an eye on the level in the room, all from your iPhone or iPad.
THREE VIEWS, ONE WORKFLOW
• RTA: live spectrum on a logarithmic frequency scale, 20Hz to 20kHz
• Spectrograph: scrolling time-frequency heatmap, where feedback shows as a persistent bright horizontal line
• SPL meter: A, C or Z weighted, Fast, Slow or Impulse, with the room's history behind it
RING-OUT
Spektral listens for a frequency that is building rather than one that is merely loud, so a bass note or a mains hum cannot set it off. When it finds one it names the frequency, gives you the musical note, and suggests the notch: centre frequency, Q and cut. Confirmed rings stay in a list as you work through them.
LEVEL AND LEQ
• Leq over 1 minute, 15 minutes, 30 minutes, 1 hour and 8 hours, all running at once
• Three hours of level history on one graph, with min, max and average
• Limit Guard: set a limit and a window, and Spektral forecasts how long you have before you reach it
• Calibrate against an acoustic calibrator when you need accurate absolute levels
PRECISION
• 4096-point FFT
• Parabolic interpolation for sub-bin cursor and peak accuracy
• Peak hold with smooth decay
• Smoothing from 1/24 octave through to 1/1
• Frame averaging up to infinite
• Musical note display on peaks and cursor
TOOLS
• Identify: labels the strongest peaks automatically, or just the single worst one
• Snapshot compare: freeze a trace and A/B against it
• Pink noise generator for reference output
TOUCH-OPTIMISED
• Horizontal pinch zooms the frequency axis, vertical pinch zooms the dB range
• Drag to pan when zoomed, tap to place the cursor
• Double-tap to reset all zoom and pan
DESIGNED FOR THE STAGE
• Full-screen dark interface for low-light environments
• Works in portrait and landscape
• Uses the built-in microphone or any connected audio interface
REMOTE MONITORING (optional in-app purchase)
Send this device's SPL readings to Spektral on your Mac over iCloud, so one engineer can watch several positions at once.
No subscriptions. No account required. The analyser runs entirely offline.
Ratings & Reviews
LIMIT GUARD HEADROOM METER
Limit Guard now shows your headroom on a meter: twelve blocks from +6 to -6 dB, counting down as the room runs out, the scale engineers already know. Around it, a marker for the last minute's level shows which way the average is heading, a tick shows where the Leq will sit in five minutes, and when you are close or over, a recovery line tells you what level to hold under and for how long.
It pulses amber only while the margin is shrinking, and holds steady while you are pulling it back. Solid red means over. Every state carries a number as well as a colour, so it reads at a glance from the desk.
The warning margin is now yours to set, at 1, 2, 3 or 6 dB, from the Limit Guard panel on the SPL page.
REMOTE MONITORING
Readings are only marked as synced once iCloud has confirmed them. Previously a phone could report "All readings synced" while iCloud was refusing the uploads, and the readings were discarded. Spektral now keeps anything iCloud has not accepted, and tells you plainly if it is being refused rather than simply waiting for a connection.
The developer, Matrix Productions Ltd, 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
- Matrix Productions Ltd
- Size
- 4.3 MB
- Category
- Music
- 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
- Age Rating
4+
- 4+
- Copyright
- © 2026 Simon Tucker

