Free & Pro

• The SPL meter: A, C and Z weighting, Slow, Fast and Impulse, with LEQ, L10, L90, MAX and session reset
• The RTA at 1/3 octave, with peak hold and Freeze
• The FFT with the Hann window at size 4096
• Trust shading on every band, and Measurement info
• Five themes, and a 15-second try of Tactical Violet
• A blurred, moving preview of the 3D waterfall on the Spectrogram tab
• The Show Real-Time Analyzer shortcut

• The spectrogram: the 3D waterfall and the 2D view
• RTA at 1/6, 1/12 and 1/24 octave
• FFT with Hamming, Blackman and Blackman-Harris windows, sizes from 1024 to 65,536, and averaging
• Room RT60
• The signal generator
• Recording, playback and A/B comparison
• PNG, CSV and PDF export, and WAV sharing
• Device compensation on supported models, reference-tone trim and external mic files
• The Tactical Violet theme, with its own layout for every screen
• The Start Recording and Play Pink Noise shortcuts

Anything that needs Pro wears a small orange lock. Tap it and the SoundMess Lab Pro sheet opens with a summary of what Pro adds and the Lifetime purchase. There is nothing to sign up for: the purchase is handled by Apple.

On a new device or after reinstalling, tap any locked feature to open the Pro sheet and tap Restore purchases, signed in with the same Apple Account. If nothing is found, the app says Nothing to restore.