Graycode vs Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Graycode
This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.
- Decimal, hex, binary, Gray code conversion
- Real-time updates
- Handy calculator for engineers
- Animated Tower of Hanoi solution
- Supports iPhone, iPad, iPod
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This app is used to convert numbers among decimal, hex, binary and gray code. If a user changes any one of these numbers, the other ones will change accordingly. It is a handy calculator for engineers to obtain the binary or gray code values from a decimal, or vise versa. In addition, an animated solution of a Hanoi Tower with three disks is also demonstrated based on the input number.
Converter
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It is a free and quick unit conversion tool. Decimal point may too long or need more accuracy, so a decimal point place selected function is provided for user. Converters: - Angle - Area - Digital Storage - Energy - Frequency - Length - Mass - Speed - Temperature - Time - Volume - Pressure Languages: - English - Traditional Chinese - Simplified Chinese
Screenshots
Verdict
The clearest difference is price: Converter at Free against Graycode's $2.99. Converter also leads on update cadence (every 3 months vs every 10 months). Graycode'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
Converter is free to download; Graycode costs $2.99 up front. Converter sells 1 one-off in-app purchase. Graycode asks for nothing beyond the download.
Graycode ships an update every 10 months, Converter every 3 months. The most recent releases landed on August 26, 2026 and August 18, 2026 respectively.
| Parameter | Graycode | Converter |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Duo Pisceses, Inc. | CHI HOU LAM |
In-app purchases
Graycode
No in-app purchases
Converter
- Remove Advertising$0.99
