Graycode vs uCalculator
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.
uCalculator
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The most powerful, beautiful & high precision Programmer, Scientific and Standard calculator on the mobile/Pad platform. The programmer mode calculator support binary(BIN), octal(OCT), decimal(DEC) and hexadecimal(HEX), precise to 64 digits. The scientific mode calculator support most scientific calculation formula, precise to 32 digits. The standard mode calculator is simple, elegant and practical, precise to 16 digits. Automatic quick switch different calculator modes while device orientation changed if auto rotation enabled. You can also force to switch to any calculator mode by long touch the top-left 'u' button or long press the keyboard key 'u' then select the desire calculator mode.
Screenshots
Verdict
The clearest difference is price: Graycode at $2.99 against uCalculator's $4.99. uCalculator's advantage is iOS requirement (9.0 vs 12.0). On update cadence, ads, in-app purchases and 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
Graycode costs $2.99 and uCalculator $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Graycode ships an update every 10 months, uCalculator every 13 months. The most recent releases landed on August 26, 2026 and September 13, 2026 respectively.
| Parameter | Graycode | uCalculator |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Duo Pisceses, Inc. | 伟锋 阮 |
In-app purchases
Graycode
No in-app purchases
uCalculator
No in-app purchases
