Sandwich Sudoku Helper vs Tone Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sandwich Sudoku Helper
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This app helps you solve a Sandwich Sudoku by showing all the possible number combinations for that sum, so you can concentrate on the logic puzzle instead of the maths! Features - Simple to use - Choose either 6x6 or 9x9 grids - Rules to ensure only combinations that include certain numbers are returned - Filters to remove combinations with certain numbers - Store each solution in a list - As you progress with your solution you can edit or delete the solutions in the list Not heard of Sandwich Sudoku? Sandwich Sudoku is a new variation on the classic game that introduces a new twist. You are provided with the sum of the numbers between 1 and 9 on each row and column. Note this app is not a game and does not supply the sudoku puzzle - it is just a nice utility to help you solve a Sandwich Sudoku you are working on, and maybe need some help!
Tone Generator
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.
- Sine, square, sawtooth, triangle wave generation
- Adjustable frequency via swipe
- Built-in hearing test sweep
- Speaker cleaning function
- Large frequency range
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Tone Generator generates sine, square, sawtooth and triangle tone at a large frequency range. Frequency of the tones can be adjusted by swiping up or down on the screen. Tone Generator has a built-in feature to quickly sweep frequency of a sine tone to test your hearing. This feature is purely for fun and should not be used for any diagnostics. Tone Generator can also help remove dust and water from device's speakerphone by playing tones at various frequencies.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sandwich Sudoku Helper | Tone Generator |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.8 (139 ratings) — better |
| Positive reviews | — | 84.1% of reviews |
| Number of ratings | — | 139 — better |
| Update frequency | Every 19 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Rick Peacock | Tevfik Yucek |
In-app purchases
Sandwich Sudoku Helper
No in-app purchases
Tone Generator
- Remove Advertisements$2.99
Questions
Is Sandwich Sudoku Helper free?
Is Tone Generator free?
Do Sandwich Sudoku Helper or Tone Generator have ads?
Which is updated more often, Sandwich Sudoku Helper or Tone Generator?
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