Comparison

MultiTone Generator vs TB Spectrogram

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MultiTone Generator

Generate a wide range of audio test tones, including sine, rectangular, triangular, and sawtooth waves. Explore frequency sweeps, noise generation, and customizable settings. Upgrade for advanced features like creating multiple tone combinations and extended frequency ranges.

Highlights
  • Generate sine, rectangular, triangular, and sawtooth waves
  • Play frequency sweep test tones
  • Sweep repeat/wobble function
  • Play white and pink noise
  • Customizable frequency and sweep time ranges
  • Create up to 16 tone combinations (PRO)
Features
Read full description

This is the all-new MultiTone Generator! An amazingly flexible and powerful frequency generator! Works with Audiobus and Audiobus Remote! Upgrade to PRO and CREATE up to 16 tone combinations. Play them individually or combined. PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth. PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency). Use the SWEEP REPEAT / WOBBLE function. Play back white and pink NOISE. Fully CUSTOMIZABLE Frequency Min-Max ranges and Sweep time range. The MultiTone Generator is AMAZINGLY INTUITIVE and SIMPLE! ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => Extending the frequency range (1Hz - 21kHz) => Extending the sweep times (1s - 600s) => Create up to 16 tone combinations => Changing maximum Sweep time slider range => Frequency slider setting to linear or logarithmic => Full support for the sequence playback menu => Full support for the remote play menu => Save/Load all configurations By using this app, you agree to Apple’s Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

TB Spectrogram

This app provides real-time audio analysis with a spectrogram, spectrum analyzer, and goniometer. It can be used as a standalone application or as an AUv3 plugin within compatible music production hosts. Visualize your audio in detail with adjustable settings and multiple display options.

Highlights
  • Real-time spectrogram and spectrum analysis
  • Goniometer for stereo signal analysis
  • AUv3 plugin compatibility
  • Adjustable frequency and time resolution
  • Customizable color themes
  • On-screen piano keyboard mapping
Features
Read full description

ToneBoosters Spectrogram shows a real-time spectrogram, spectrum, and goniometer AUv3 plugin! We have taken the stunning visual spectrum analyzer features from our latest and greatest Equalizer Pro plugin and released it as a separate app / AUv3 plugin! The ToneBoosters Spectrogram app captures the microphone input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters Spectrogram will appear in the list of Audio Unit extensions for effect plug-ins. Key features: - Fully resizable (as AUv3 plugin) - Color themes for the user interface - Max screen support in Garageband - Adjustable color themes for UI and for spectrogram independently - Adjustable dynamic range - Adjustable frequency resolution - Adjustable time resolution - Adjustable spectral slope - Spectrogram AGC and dimming support - Show spectrogram and spectrum analyzer as overlay or individually - Spectrum analyzer also supports peak hold - Split-band goniometer for stereo signal analysis (correlation, left/right balance in one or two bands!) - On-screen piano keyboard to map spectrum analyzer to piano notes - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.

Screenshots

MultiTone Generator4 screens
TB Spectrogram2 screens

Verdict

The call

The clearest difference is in-app purchases: TB Spectrogram at none against MultiTone Generator's 7. TB Spectrogram also leads on iOS requirement (13.0 vs 15.5). MultiTone Generator's advantage is ratings volume (355 vs 50) and review sentiment (80% vs 71%). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MultiTone Generator sells 7 in-app purchases, starting at $1.49 per month. TB Spectrogram asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MultiTone Generator holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: MultiTone Generator has 355 ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 80% of MultiTone Generator's written reviews are positive against 71% of TB Spectrogram's.

UpkeepUpdate frequency

MultiTone Generator ships an update monthly, TB Spectrogram every 3 weeks. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

Scorecard5 real differences · 5 level
MultiTone Generator versus TB Spectrogram: the parameters behind the verdict, then further details
ParameterMultiTone GeneratorTB Spectrogram
PriceFreeFree
Rating4.6 (355 ratings) — better4.4 (50 ratings)
Positive reviews80.0% of reviews — better71.0% of reviews
Number of ratings355 — better50
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.513.0 — better
Further details — not scored
Size9 MB15 MB
Age rating4+4+
DeveloperThomas GruberToneBoosters

Customer experience

MultiTone Generator

All ratings355 ratings
Positive89.6%
Neutral4.8%
Negative5.6%
Written reviews35 reviews
Positive80.0%
Neutral5.7%
Negative14.3%

TB Spectrogram

All ratings50 ratings
Positive86.0%
Neutral2.0%
Negative12.0%
Written reviews31 reviews
Positive71.0%
Neutral6.5%
Negative22.6%

Bugs and requests

MultiTone Generator

Reported bugs

4 issues
  • Left and right speaker switches do not work
  • App drains battery when in background
  • Amplitude difficult to adjust on iPhones
  • High battery consumption after iOS 11 upgrade

Requested features

11 requests
  • Custom frequency names (bold)
  • Reorder frequency list
  • Display saved preset names at top
  • Sweeping duration less than 0.1s
  • Create and save multiple tracks
Show 6 more
  • More frequency rows to add
  • Create and name groupings of frequencies
  • Summation of multiple waves in a single waveform
  • Logarithmic frequency selection
  • Auto-stop tones after X seconds
  • Tones auto-stop on app minimize

TB Spectrogram

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

MultiTone Generator

Subscriptions4
  • MultiTone PRO for one month$1.491 Month
  • MultiTone PRO+ for one month$2.991 Month
  • MultiTone PRO for one year$7.991 Year
Show 1 more
  • MultiTone PRO+ for one year$14.991 Year
One-time3
  • MultiTone PRO Lifetime Access$9.99
  • MultiTone PRO+ Lifetime Access$9.99
  • MultiTone PRO+ Lifetime Access$19.99
None

TB Spectrogram

No in-app purchases

Questions

Is MultiTone Generator free?
MultiTone Generator is free to download, with in-app purchases available.
Is TB Spectrogram free?
TB Spectrogram is free to download, with no in-app purchases.
Which has better reviews, MultiTone Generator or TB Spectrogram?
MultiTone Generator is rated higher. MultiTone Generator averages 4.6 out of 5 from 355 ratings, while TB Spectrogram averages 4.4 from 50 ratings.
Do MultiTone Generator or TB Spectrogram have ads?
Neither MultiTone Generator nor TB Spectrogram shows ads.
Which is updated more often, MultiTone Generator or TB Spectrogram?
MultiTone Generator ships an update monthly, and TB Spectrogram every 3 weeks. Most recently, MultiTone Generator was updated on October 7, 2026 and TB Spectrogram on October 6, 2026.

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