Comparison

Tone Generator Ultra vs Harmonic Explorer

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

Head to head
About

Tone Generator Ultra

Generate a wide range of audio test tones and frequencies, from sine waves to white noise. Ideal for audio system calibration, speaker testing, and acoustic analysis. Offers advanced features like chromatic pitch detection and sweep utilities.

Highlights
  • Sine, Square & Sawtooth Wave Generation
  • Chromatic pitch detection
  • White and pink noise generation
  • Multi-tone generator
  • Logarithmic / linear sweep utility
  • Frequency range 20Hz to 22kHz
Read full description

Tone Generator Ultra is a simple and easy-to-use test tone and frequency generator. Tones can be set by frequency or musical note. Features: -Sine, Square & Sawtooth Wave Generation -Chromatic pitch detection from external sources -Configurable A4 callibration -White and pink noise -Multi-tone generator -Impulse wave -Supports frequencies from 20Hz to 22kHz -Logarithmic / linear sweep utility with adjustable upper and lower frequencies and delay Tone Generators are very useful for a variety of tasks including: - Balancing your Stereo or Home Cinema System - Testing Speakers - Acoustics testing - White and Pink Noise Generator Can be used inconjunction with PocketRTA Ultra Spectrum Analyzer for the iPhone. Or for fun - Compare your friends hearing, see who is straining to hear the sounds - Annoy your best friend with that pesky sound. - But definately not to be used to annoy your teachers.

About

Harmonic Explorer

Features
Read full description

Harmonic Explorer is a unique musical instrument built for sonic discovery. Tap into a grid of harmonic tones, pan across four octaves, and sculpt sound with layered controls that invite both casual play and deep experimentation. From soft, violin-like purity to rich metallic textures and spatial choruses, Harmonic Explorer offers a wide expressive range. Adjust harmonic gains, spread tones into lush chords, or reduce everything down to a single precise frequency. Key Features: - Intuitive multi-touch interface with four full octaves - Portrait and Landscape mode fully supported - Harmonic tone generation with per-voice amplitude control - Dynamic chord spread control — from single tones to shimmering triads - Built-in reverb with selectable acoustic spaces (from Room to Cathedral) - Randomize and Reset for playful experimentation or clean slates - Route Picker to send audio directly to Bluetooth or external devices - Designed for real-time performance and sound exploration - Fully offline — no ads, no tracking, no accounts, no interruptions Whether you're a composer looking for new inspiration, a student learning sound design, or just curious about the nature of harmonic structure, Harmonic Explorer offers a fresh way to hear and shape music. Sculpt tones. Discover timbres. Explore harmonics.

Screenshots

Tone Generator Ultra4 screens
Harmonic Explorer4 screens

Verdict

The call

The clearest difference is in-app purchases: Harmonic Explorer at none against Tone Generator Ultra's 1. Harmonic Explorer also leads on price ($0.99 vs $1.99). Tone Generator Ultra's advantage is iOS requirement (7.0 vs 15.6). On update cadence, ads and device support 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

Tone Generator Ultra costs $1.99 and Harmonic Explorer $0.99 up front. Tone Generator Ultra sells 1 one-off in-app purchase. Harmonic Explorer asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on October 20, 2026 and September 21, 2026 respectively.

Scorecard3 real differences · 7 level
Tone Generator Ultra versus Harmonic Explorer: the parameters behind the verdict, then further details
ParameterTone Generator UltraHarmonic Explorer
Price$1.99$0.99 — better
Rating3.4 (8 ratings) — better—
Positive reviews57.5% of reviews—
Number of ratings8 — better—
Update frequencyEvery 7 monthsEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.6
Further details — not scored
Size3 MB2 MB
Age rating4+4+
Developer4Pockets.comPhilippe Zay

In-app purchases

1 purchases

Tone Generator Ultra

One-time1
  • Unlock Tone Generator Ultra$1.99
None

Harmonic Explorer

No in-app purchases

Questions

Is Tone Generator Ultra free?
Tone Generator Ultra costs $1.99, and also offers in-app purchases.
Is Harmonic Explorer free?
Harmonic Explorer costs $0.99, with no in-app purchases.
Do Tone Generator Ultra or Harmonic Explorer have ads?
Neither Tone Generator Ultra nor Harmonic Explorer shows ads.
Which is updated more often, Tone Generator Ultra or Harmonic Explorer?
Tone Generator Ultra ships an update every 7 months, and Harmonic Explorer every 7 months. Most recently, Tone Generator Ultra was updated on October 20, 2026 and Harmonic Explorer on September 21, 2026.

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