x2y vs Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
x2y
This app simplifies aspect ratio calculations for designers and web developers. It quickly computes missing dimensions or percentages for images and videos, offering custom aspect ratios and quick scaling options.
- Automatic dimension and percentage calculation
- Customizable common aspect ratios
- Quick scaling (double, triple, half, one-third)
- Solve for x, y, or percentage
- Solve for diagonal
- Pixel rounding or decimal precision
- Left/right-handed layout options on iPad
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Sure, we all know how to cross-multiply. But if you do lots of resizing calculations every day, you can save yourself hours with this simple application. x2y is a beautifully simple aspect ratio calculator for the iPad, iPhone, or iPod touch. Built for designers and web developers who need to resize images and videos in code, x2y calculates dimensions and percentages for you automatically. Just choose the original aspect ratio or size, enter one of the new desired dimensions or a percentage, and the missing dimension(s) will be calculated instantly. • Choose from a list of common aspect ratios for even faster calculations. • Customize the list of common aspect ratios to include your own. • Swap the x and y coordinates as needed with a single tap • Double or triple the dimensions of your outputed images with a single tap. (Great for figuring out those @2x and @3x dimensions quickly.) • Half or one-third the dimensions of your outputed images with a single long tap. • Solve for either x or y dimension. • Solve for a particular percentage. • Solve for diagonal of both ratios • Round to the nearest pixel, or show up to three decimal places, for more precise results. • On iPad, choose left or right handed layouts, for better placement of commonly used interface controls. • Select from several different color themes, to suit your preference • Sync your custom aspects, selected theme, and more, between all your iOS devices over iCloud. x2y conforms to the size of your screen. It is fully compliant with Voice Over for the visually impaired. Use the in-app help guide to learn more about all the features of this app. If you have suggestions for additional common aspect ratios, or if you’d like to see other features added, feel free to contact me via the support link.
Key
This application uses your device's microphone to capture and decode dual-tone multi-frequency (DTMF) signals in real-time. It displays the decoded numbers instantly on your screen, making it a useful tool for professionals and tech enthusiasts.
- Real-time DTMF signal decoding
- Uses device microphone
- Displays decoded numbers instantly
- Suitable for professionals
- Useful for tech enthusiasts
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Key-Tone-Decoder: Real-Time DTMF Signal Decoder Dual-tone multi-frequency (DTMF) signaling is a telecommunication system that facilitates communication between telephone equipment, other devices, and switching centers using voice-frequency tones over telephone lines. Key-Tone-Decoder leverages your iPhone's microphone to capture these DTMF signals, instantly decoding them and displaying the decoded numbers on your screen in real-time. Perfect for professionals and tech enthusiasts, Key-Tone-Decoder makes it easy to decode DTMF signals right from your device.
Screenshots
Verdict
The clearest difference is review sentiment: x2y at 88% against Key's 0%. x2y also leads on price (Free vs $0.99) and rating (5.0 vs 1.0). Key's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On ads 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
x2y is free to download; Key costs $0.99 up front. x2y sells 1 one-off in-app purchase. Key asks for nothing beyond the download.
x2y holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: x2y has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 88% of x2y's written reviews are positive against 0% of Key's.
| Parameter | x2y | Key |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (8 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 87.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 5 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Joseph Cieplinski | NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI |
Customer experience
x2y
Key
In-app purchases
x2y
- Premium$2.49
Key
No in-app purchases









