Comparison

x2y vs Key

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Real-time DTMF signal decoding
  • Uses device microphone
  • Displays decoded numbers instantly
  • Suitable for professionals
  • Useful for tech enthusiasts
Features
Read full description

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

x2y4 screens
Key4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

Scorecard7 real differences · 3 level
x2y versus Key: the parameters behind the verdict, then further details
Parameterx2yKey
PriceFree — better$0.99
Rating5.0 (8 ratings) — better1.0 (1 ratings)
Positive reviews87.5% of reviews — better0.0% of reviews
Number of ratings8 — better1
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.6 — better
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperJoseph CieplinskiNANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI

Customer experience

x2y

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive87.5%
Neutral12.5%
Negative0.0%

Key

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

x2y

One-time1
  • Premium$2.49
None

Key

No in-app purchases

Questions

Is x2y free?
x2y is free to download, with in-app purchases available.
Is Key free?
Key costs $0.99, with no in-app purchases.
Which has better reviews, x2y or Key?
x2y is rated higher. x2y averages 5.0 out of 5 from 8 ratings, while Key averages 1.0 from 1 ratings.
Do x2y or Key have ads?
Neither x2y nor Key shows ads.

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