# Sandwich Sudoku Helper vs Tone Generator

The clearest difference is price: Tone Generator at Free against Sandwich Sudoku Helper's $0.99. Tone Generator also leads on update cadence (every 4 months vs every 19 months) and iOS requirement (16.0 vs 26.0). Sandwich Sudoku Helper's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Tone Generator is free to download; Sandwich Sudoku Helper costs $0.99 up front. Tone Generator sells 1 one-off in-app purchase. Sandwich Sudoku Helper asks for nothing beyond the download.

Sandwich Sudoku Helper ships an update every 19 months, Tone Generator every 4 months. The most recent releases landed on October 21, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Sandwich Sudoku Helper | Tone Generator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.8 (139 ratings)](https://appshunter.io/ios/app/tone-generator-frequency-app/id1561496708/reviews)** |
| Number of ratings | — | **139** |
| Positive reviews | — | 84.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 19 months | **Every 4 months** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 6 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rick Peacock](https://appshunter.io/developer/286052385) | [Tevfik Yucek](https://appshunter.io/developer/566982862) |

## What reviewers say

### Sandwich Sudoku Helper

[App page](https://appshunter.io/ios/app/sandwich-sudoku-helper/id1480982477)

**Features:** Vision Pro support

**In-app purchases:** none


### Tone Generator

[App page](https://appshunter.io/ios/app/tone-generator-frequency-app/id1561496708)

Generate various audio tones like sine, square, sawtooth, and triangle waves across a wide frequency range. Adjust frequencies by swiping and utilize built-in features for fun hearing tests or to clean your device's speaker.

**Highlights:** Sine, square, sawtooth, triangle wave generation, Adjustable frequency via swipe, Built-in hearing test sweep, Speaker cleaning function, Large frequency range

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertisements | $2.99 | one-time |


## Frequently asked questions

### Is Sandwich Sudoku Helper free?

Sandwich Sudoku Helper costs $0.99, with no in-app purchases.

### Is Tone Generator free?

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

### Do Sandwich Sudoku Helper or Tone Generator have ads?

Tone Generator shows ads; Sandwich Sudoku Helper does not.

### Which is updated more often, Sandwich Sudoku Helper or Tone Generator?

Sandwich Sudoku Helper ships an update every 19 months, and Tone Generator every 4 months. Most recently, Sandwich Sudoku Helper was updated on October 21, 2026 and Tone Generator on October 29, 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.*