Choose Live or Record
Live keeps the current advice and graphs on screen. Record stores the complete pass with timestamps.
You always know whether you are checking now or saving a pass.A practical soundcheck app for iPhone & iPad
Place your iPhone or iPad by the mixer, start listening and keep the graphs and Soundcheck Coach in view. Tonezio shows what is happening now; Plus saves each pass so you can compare, learn and share the result.
Practical soundcheck aid. Built-in microphones vary, so level readings are estimates and Coach suggestions must be checked by ear.

At the mixer
Use Live when you need an answer now. Choose Record when you want to test a change and return to the result afterwards.
Live keeps the current advice and graphs on screen. Record stores the complete pass with timestamps.
You always know whether you are checking now or saving a pass.Play the system at a comfortable soundcheck level. Tonezio waits for a useful, stable pattern before changing its advice.
The latest action stays prominent beside the graphs.Follow the listening suggestion, make a cautious adjustment and run another pass when needed.
Plus compares passes and keeps the evidence in History.The live workspace
This is the actual app. The RTA and spectrogram remain visible while the Coach gives one readable action and keeps recent stable guidance nearby.


Shows the current frequency balance from 20 Hz to 20 kHz. Choose 1 Oct, 1/3, 1/6, 1/12, 1/24 or 1/48 octave detail.
Shows frequency content over time. Stronger frequencies become brighter, making sustained notes and changes easier to spot.
Instant, Fast, Slow and Infinite averaging control how quickly the RTA moves. Slow is the default for a stable, readable curve.
RTA and spectrogram are visible together by default on iPad. Drag the divider to give either graph more room.
Shows the current level and maximum using the built-in microphone. It is useful for comparisons, not certified measurements.
The app starts in English. Change language inside the app; the localization structure supports more languages later.
Soundcheck Coach
The Coach turns stable spectrum patterns into a short instruction you can read from the mixer. Tap it only when you want the longer explanation.

The Coach waits before changing its message, so short peaks do not constantly replace the current advice.
You see what to check first without opening another view. The longer reasoning remains one tap away.
Recent stable advice stays visible so you can move around the room without watching every change.
Recorded passes keep Coach notes, possible-feedback events and exact times in History and PDF reports.
Tonezio Plus
Free helps you understand the room right now. Plus is the one-time unlock for saving evidence, checking a change and bringing the result to the next rehearsal or gig.

What you get after purchase
When a narrow frequency keeps building, Tonezio shows the exact frequency and a cautious starting suggestion for gain and Q. The event is stored with the recording.
Always confirm by ear before making a permanent EQ change.Saves derived level samples, compact spectrum history, timestamps, Coach guidance, feedback evidence and your own markers. Microphone audio is never stored.
Run the check again after moving a speaker or adjusting EQ. Tonezio compares the two passes so you can see whether the change helped.
Zoom and scroll the timeline, tap exact times, inspect saved Coach/feedback evidence and ask common questions with quick buttons.
The built-in debrief works on devices without Apple Intelligence.Exports the level graph, low/average/high values, markers, possible-feedback frequencies and the complete Coach timeline.
Open a complete example to understand History, Coach notes, possible feedback and the debrief before recording your own session.
Exactly what is included
There is no subscription. The live analyzer and current Coach action are free; Plus is a permanent one-time purchase for the complete soundcheck workflow.
Tonezio Plus is planned as one permanent in-app purchase. The exact localized price will be shown before purchase in the app and App Store.
When you choose to record, Tonezio stores derived level values, timestamps, Coach observations and markers locally or in your private iCloud Drive when available.
Built-in microphones differ between devices. Use Tonezio for practical soundchecks, comparisons and guidance—not regulated or calibrated measurements.
Musicians, rehearsal rooms, volunteer technicians and smaller venues that want clearer information from the device already in their pocket.
Feedback
Messages from the website and app are sent to the Tonezio inbox. Include what you tapped, what happened and which device you used.