Comparison

PixelCalc vs addy.io

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

Head to head
About

PixelCalc

This tool helps graphic designers and others convert image dimensions between pixels and inches at various resolutions. It also features a proportional calculator for accurate resizing and reference charts for print sizes and camera settings.

Highlights
  • Pixel to Inch conversion
  • Inch to Pixel conversion
  • Resolution adjustment
  • Proportional calculator for resizing
  • Print size reference charts
  • Camera shutter speed chart
Features
Read full description

PixelCalc is a very convenient tool for anyone working with digital images, whether from a Camera, scanner or other input device. It is especially useful for graphic designers who work with both Web and Print media. Either of these two areas of media frequently require conversions from Pixels to Inches and Inches to Pixels along with a desired Resolution (i.e. hi-res, medium-res or low-res). Now includes a Proportional Calculator and useful Reference Charts. Proportional Calculator The Proportional Calculator will instantly calculate enlargements or reductions of images, photos, artwork, layouts, or any kind of design. Basically, anything that needs to be resized accurately while maintaining perfect proportions, the Proportional Calculator will do it. Contains the following handy reference charts: -Maximum Print Size per Megapixels (different resolutions) -Maximum Print Sizes (in inches) by Megapixels @ 300ppi -Shutter Speed Chart (Useful camera tool for perfect shots!) -See the charts in the app for detailed reference information

About

addy.io

Manage your email aliases and recipients on the go with this sleek mobile application. Create new aliases, forward emails, and receive notifications for delivery issues. Securely access your account with biometric authentication.

Highlights
  • Create and manage email aliases
  • Forward emails from anywhere
  • Biometric app lock
  • Notifications for delivery issues
  • Alias management via Shortcuts and Siri
  • Widgets for quick access
  • WatchOS app for on-the-go management
Features
Read full description

Easily create and manage your addy.io aliases, recipients and more from your phone, tablet or wearable with this gorgeous addy.io app for iOS and iPadOS. Requirements: addy.io instance running v1.7.3 or higher (current version of the addy.io app has been tested with v1.7.3) Characteristics: - Connect to a hosted addy.io instance or your own self-hosted instance - A unique, gorgeous and sleek design, based on the Human Interface Guidelines - Support for Deep Link to easily deactivate aliases from the email banner - Lock the app using Biometrics - App exclusive features - Watching aliases for new emails - Send emails from aliases from anywhere by selecting and sharing text or an email address - Get notified on failed deliveries, domain errors and expiring subscriptions - Create aliases using Shortcuts and Siri - Manage your addy.io subscription - Enable error logging to *locally* store exceptions for easy troubleshooting - Widgets! - Manage and create aliases on the go with the WatchOS app, including support for Siri Security: - Keychain API, your API key and other addy.io related settings are securely stored on your device using the Keychain API - I am forgoing the convenient third-party collection SDK and various stats just so you can use it with confidence. Manage (add, edit, delete): - Aliases - Recipients - Domains - Usernames - Rules - Blocklist - Labels - Failed deliveries What is addy.io: addy.io is an open source email forwarding service designed to protect an Internet user's email addresses from spam and other unwanted emails. Using the addy.io app managing your aliases has become easier than ever! addy.io Terms of Service: https://addy.io/terms?ref=appstore addy.io Privacy Policy: https://addy.io/privacy?ref=appstore

Screenshots

PixelCalc4 screens
addy.io4 screens

Verdict

The call

The clearest difference is price: addy.io at Free against PixelCalc's $2.99. addy.io also leads on review sentiment (81% vs 42%) and update cadence (every 3 weeks vs every 3 months). PixelCalc's advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 17.0). 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

addy.io is free to download; PixelCalc costs $2.99 up front. addy.io sells 3 in-app purchases, starting at $3.99 per month. PixelCalc asks for nothing beyond the download.

UpkeepUpdate frequency

PixelCalc ships an update every 3 months, addy.io every 3 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
PixelCalc versus addy.io: the parameters behind the verdict, then further details
ParameterPixelCalcaddy.io
Price$2.99Free — better
Rating—4.7 (70 ratings) — better
Positive reviews41.7% of reviews81.0% of reviews — better
Number of ratings—70 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS11.0 — better17.0
Further details — not scored
Size4 MB56 MB
Age rating4+4+
DeveloperJohn Lullieaddy.io

Customer experience

PixelCalc

Written reviews12 reviews
Positive41.7%
Neutral16.7%
Negative41.7%

addy.io

All ratings70 ratings
Positive91.4%
Neutral4.3%
Negative4.3%
Written reviews21 reviews
Positive81.0%
Neutral9.5%
Negative9.5%

In-app purchases

None

PixelCalc

No in-app purchases

3 purchases

addy.io

Subscriptions3
  • Pro Plan (1 Month)$3.991 Month
  • Lite Plan (1 Year)$13.491 Year
  • Pro Plan (1 Year)$39.991 Year

Questions

Is PixelCalc free?
PixelCalc costs $2.99, with no in-app purchases.
Is addy.io free?
addy.io is free to download, with in-app purchases available.
Do PixelCalc or addy.io have ads?
Neither PixelCalc nor addy.io shows ads.
Which is updated more often, PixelCalc or addy.io?
PixelCalc ships an update every 3 months, and addy.io every 3 weeks. Most recently, PixelCalc was updated on October 8, 2026 and addy.io on October 11, 2026.

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