# Frequency Generator vs KeyStart

The clearest difference is rating: Frequency Generator at 3.0 against KeyStart's 1.0. On price, ratings volume, update cadence and ads there is nothing between them.

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

Frequency Generator holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Frequency Generator ships an update every 14 months, KeyStart every 13 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Frequency Generator | KeyStart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/frequency-generator-tone-a4/id6529535310/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/keystart/id6749829964/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 13 months** |
| Monetization | Free | Free |
| Size | 7 MB | 24 MB |
| Requires iOS | **15** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383) | [Bernhard Mitas](https://appshunter.io/developer/1802023240) |

## What reviewers say

### Frequency Generator

[App page](https://appshunter.io/ios/app/frequency-generator-tone-a4/id6529535310)

This utility app provides a simple and straightforward tuning fork. It allows users to generate any frequency between 20 Hz and 20,000 Hz, limited only by the device's speaker and human hearing.

**Highlights:** Adjustable frequency range (20 Hz - 20,000 Hz), Simple and easy to use interface, Generates audio tones, No complex settings

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

**In-app purchases:** none


### KeyStart

[App page](https://appshunter.io/ios/app/keystart/id6749829964)

This utility app provides a reliable pitch tool for choirs, a cappella groups, and vocalists. Select your desired key, play the correct chord or note, and ensure your group starts singing in tune.

**Highlights:** Choir pitch tool, A cappella group support, Vocalist tuning, Key selection, Chord and note playback, Singing in tune

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

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Generator free?

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

### Is KeyStart free?

KeyStart is free to download, with no in-app purchases.

### Which has better reviews, Frequency Generator or KeyStart?

Frequency Generator is rated higher. Frequency Generator averages 3.0 out of 5 from 2 ratings, while KeyStart averages 1.0 from 1 ratings.

### Do Frequency Generator or KeyStart have ads?

Neither Frequency Generator nor KeyStart shows ads.

### Which is updated more often, Frequency Generator or KeyStart?

Frequency Generator ships an update every 14 months, and KeyStart every 13 months. Most recently, Frequency Generator was updated on October 24, 2026 and KeyStart on October 6, 2026.

---

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