Comparison

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.

Head to head
About

Tone Scope Lab

Features
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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 instrument’s 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 instrument’s sound behaves.

About

Audio Spectrum Pro

Features
Read 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

Tone Scope Lab4 screens
Audio Spectrum Pro4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

Scorecard2 real differences Β· 4 level
Tone Scope Lab versus Audio Spectrum Pro: the parameters behind the verdict, then further details
ParameterTone Scope LabAudio Spectrum Pro
PriceFreeFree
Update frequencyEvery 5 daysEvery 5 days
AdsYesNo β€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS15.0 β€” better16.2
Further details β€” not scored
Size25 MB3 MB
Age rating4+4+
DeveloperYosuke OuchiVADMAX SP Z 0 0

In-app purchases

None

Tone Scope Lab

No in-app purchases

None

Audio Spectrum Pro

No in-app purchases

Questions

Is Tone Scope Lab free?
Tone Scope Lab is free to download, with no in-app purchases.
Is Audio Spectrum Pro free?
Audio Spectrum Pro is free to download, with no in-app purchases.
Do Tone Scope Lab or Audio Spectrum Pro have ads?
Tone Scope Lab shows ads; Audio Spectrum Pro does not.
Which is updated more often, Tone Scope Lab or Audio Spectrum Pro?
Tone Scope Lab ships an update every 5 days, and Audio Spectrum Pro every 5 days. Most recently, Tone Scope Lab was updated on October 18, 2026 and Audio Spectrum Pro on October 7, 2026.

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