# Tone Generator EX vs Signals Generator

The clearest difference is in-app purchases: Tone Generator EX at none against Signals Generator's 14. Tone Generator EX also leads on update cadence (every 9 days vs every 33 months) and review sentiment (91% vs 67%). Signals Generator's advantage is ads (none vs shown). On price, rating and device support there is nothing between them.

Both are free to download. Signals Generator sells 14 one-off in-app purchases. Tone Generator EX asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Tone Generator EX against 4.7 for Signals Generator. That said, the two scores are not equally well evidenced: Tone Generator EX has 529 ratings behind it against 30, so its average is the more settled of the two. Written reviews are what separate them: 91% of Tone Generator EX's written reviews are positive against 67% of Signals Generator's.

Tone Generator EX ships an update every 9 days, Signals Generator every 33 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tone Generator EX | Signals Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (529 ratings)](https://appshunter.io/ios/app/tone-generator-ex/id1462601423/reviews)** | [4.7 (30 ratings)](https://appshunter.io/ios/app/signals-generator/id1526653387/reviews) |
| Number of ratings | **529** | 30 |
| Positive reviews | **90.7% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 33 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 29 MB | 15 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [An-Che Lee](https://appshunter.io/developer/1314851569) | [怀卫 张](https://appshunter.io/developer/1252544375) |

## What reviewers say

### Tone Generator EX

[App page](https://appshunter.io/ios/app/tone-generator-ex/id1462601423)

Generate a wide range of audio tones with adjustable frequencies and waveforms. Control playback in the background, from your notification drawer, or lock screen. The app automatically pauses for calls and alarms, and allows you to save custom presets.

**Highlights:** Frequency range 15Hz to 22KHz, Sine, Square, Sawtooth, Triangle waveforms, Auto-off timer, Background playback, Notification drawer control, Create custom presets, Set frequency by music note

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Clean, intuitive, and elegant interface design
- 🎵 Precise frequency control with decimal accuracy
- 💰 Completely free with no ads or subscriptions
- ⚙️ Customizable A440 tuning standard adjustment
- 💾 Preset saving and loading functionality

**What reviewers complain about**

- 📉 Limited frequency range (minimum 15Hz, maximum needs extension)
- 🚫 No direct frequency input via typing
- ⏸️ No export functionality for generated tones
- 🔇 Clicking sounds during frequency adjustments
- 📱 No stereo output capability

**Reported bugs**

- App crashes and won't play after initial use
- Requires unnecessary credit card information
- Potential compatibility issues with newer iOS versions

**Requested features**

- Extend frequency range to 10Hz or lower (0-12Hz requested)
- Extend upper frequency range to support .4-12Hz adjustments
- Direct frequency input by typing instead of dial adjustment
- VST3/AUv3/desktop plugin version for DAW integration
- Frequency sweep functionality with adjustable speed


### Signals Generator

[App page](https://appshunter.io/ios/app/signals-generator/id1526653387)

Transform your mobile device into a dual-channel signal generator for sound and audio electric signals. Offers a wide variety of waveform types and customizable parameters like amplitude, frequency, and phase. Ideal for professionals and hobbyists for signal generation and circuit measurement.

**Highlights:** Dual-channel signal generation, Multiple waveform types, Adjustable amplitude, frequency, and phase, Independent channel control, Zoomable waveform display, Interface color selection

**Features:** Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sine Wave | $0.99 | one-time |
| Square Wave | $0.99 | one-time |
| Gaussian Noise | $0.99 | one-time |
| Uniformly distributed noise | $0.99 | one-time |
| Pink Noise | $0.99 | one-time |
| Red (brown) noise | $0.99 | one-time |
| Maximum Length Sequence | $0.99 | one-time |
| Rayleigh Noise | $0.99 | one-time |
| Sawtooth Wave | $0.99 | one-time |
| Gamma Noise | $0.99 | one-time |
| Functional Wave | $2.99 | one-time |
| Sweep Signal | $2.99 | one-time |
| All Noise Signals | $3.99 | one-time |
| All type of signals | $7.99 | one-time |


## Frequently asked questions

### Is Tone Generator EX free?

Tone Generator EX is free to download, with no in-app purchases.

### Is Signals Generator free?

Signals Generator is free to download, with in-app purchases available.

### Which has better reviews, Tone Generator EX or Signals Generator?

Tone Generator EX is rated higher. Tone Generator EX averages 4.8 out of 5 from 529 ratings, while Signals Generator averages 4.7 from 30 ratings.

### Do Tone Generator EX or Signals Generator have ads?

Tone Generator EX shows ads; Signals Generator does not.

### Which is updated more often, Tone Generator EX or Signals Generator?

Tone Generator EX ships an update every 9 days, and Signals Generator every 33 months. Most recently, Tone Generator EX was updated on October 23, 2026 and Signals Generator on October 24, 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.*