Tone Scope Lab vs Audio Spectrum Pro
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Tone Scope Lab
Read full descriptionHide full description
Tone Scope Lab is a real-time tuner and spectrum analysis tool designed for musicians who want to see pitch, not just read a number. At the center of Tone Scope Lab is its infinite circular pitch ruler, which provides a continuous visual view of pitch movement while you play. Real-time spectrum visualization lets you see the frequency components of your instrumentβs sound, providing another visual perspective alongside the pitch ruler. The Transpose Ruler provides a quick visual reference for transposing instruments, helping you relate written and sounding pitches at a glance. Choose from three generations of analysis and display systems: β’ Gen-1 β a simple and direct tuning view β’ Gen-2 β enhanced analysis and visualization β’ Gen-3 β the latest generation, combining multiple stages of analysis for more focused pitch detection Tone Scope Lab also supports instrument presets. The built-in General preset provides flexible, all-purpose tuning, while additional instrument presets can be downloaded for more focused analysis ranges. Features: β’ Real-time pitch detection β’ Infinite circular pitch ruler β’ Real-time spectrum visualization β’ Transpose Ruler for transposing instruments β’ Frequency display β’ Three generations of analysis and display β’ Instrument presets β’ Downloadable additional presets β’ Adjustable spectrum display modes β’ Designed for instrument practice, tuning, and sound observation Tone Scope Lab is designed to make pitch behavior visible β from a simple tuning reference to a deeper view of how your instrumentβs sound behaves.
Audio Spectrum Pro
Read full descriptionHide full description
A professional audio toolkit for live sound engineers. Audio Spectrum Pro is a complete measurement suite on your iPhone: spectrum analyzer, chromatic tuner, oscilloscope, loudness meter, test-signal generator, and RT60 reverberation time measurement. Everything in one app, with a dark interface built for the stage and the concert hall. SPECTRUM ANALYZER Real-time spectrum from 50 Hz to 16 kHz on a logarithmic scale. Automatic peak detection highlights problem frequencies instantly. The "EQ Suggestions" panel tells you which band to cut and by how many decibels - before feedback ever happens. CHROMATIC TUNER High-precision pitch detection accurate to hundredths of a cent. Supports guitar, bass, violin, viola, cello, ukulele, mandolin, banjo, and a chromatic mode. Adjustable A4 reference, capo support, and a noise gate to reject bleed from the PA. OSCILLOSCOPE Real-time waveform display for signal-integrity checks, phase inspection, and clipping detection. The first thing you reach for when something sounds wrong. LOUDNESS METER Simultaneous RMS and true-peak readout with a scrolling history graph (120 frames). Watch your average level and catch peak spikes before they slam your limiters. TEST-SIGNAL GENERATOR Pink noise, white noise, a logarithmic sine sweep (20 Hz to 20 kHz), or a fixed tone from 50 Hz to 8 kHz - all played through the speaker while the mic keeps analyzing. Tune PA systems, ring out monitor wedges, and find room resonances without a separate signal generator. RT60 REVERBERATION ANALYSIS Tap Start, make an impulse (a clap, a click, or a sine sweep) - the app records the decay, computes T20, and extrapolates RT60. Size up a room's acoustics in seconds and know whether they're working for you or against you. BUILT FOR THE FIELD - Mic gain control with the volume buttons - one hand, while the other stays on the console - Fully dark interface - readable under stage lighting, easy on your night vision - Landscape orientation - lay it on the meter bridge or a side table - Three interface languages: English, Russian, Ukrainian Microphone access is required. A speaker or headphones are needed to play test signals.
Screenshots
Verdict
The clearest difference is ads: Audio Spectrum Pro at none against Tone Scope Lab's shown. Tone Scope Lab's advantage is device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.
| Parameter | Tone Scope Lab | Audio Spectrum Pro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Every 5 days |
| Ads | Yes | No β better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.0 β better | 16.2 |
| Further details β not scored | ||
| Size | 25 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Yosuke Ouchi | VADMAX SP Z 0 0 |
In-app purchases
Tone Scope Lab
No in-app purchases
Audio Spectrum Pro
No in-app purchases
Questions
Is Tone Scope Lab free?
Is Audio Spectrum Pro free?
Do Tone Scope Lab or Audio Spectrum Pro have ads?
Which is updated more often, Tone Scope Lab or Audio Spectrum Pro?
Other comparisons















