# Tone Generator Ultra vs Harmonic Explorer

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.

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.

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

## The numbers

| Metric | Tone Generator Ultra | Harmonic Explorer |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[3.4 (8 ratings)](https://appshunter.io/ios/app/tone-generator-ultra/id514273546/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 57.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 2 MB |
| Requires iOS | **7.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [Philippe Zay](https://appshunter.io/developer/1200498230) |

## What reviewers say

### Tone Generator Ultra

[App page](https://appshunter.io/ios/app/tone-generator-ultra/id514273546)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Tone Generator Ultra | $1.99 | one-time |


### Harmonic Explorer

[App page](https://appshunter.io/ios/app/harmonic-explorer/id6747025974)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*