Comparison

Calzy vs Complication Lab

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

Head to head
About

Calzy

This app offers a modern and intuitive way to perform everyday calculations. It features a unique Memory Area for reusing values, bookmarking for saved calculations, and leverages the latest iOS technologies for a seamless experience. Designed with privacy in mind, it's suitable for students and professionals alike.

Highlights
  • Memory Area for reusing values
  • Calculation bookmarking with titles
  • Basic and advanced calculation modes
  • Privacy mode with Face ID
  • Live Activity and Haptic Touch support
  • Customizable keypad layout
  • Dark and Light modes
Features
Currently charting
Read full description

Make your day-to-day calculations quick, easy, and beautiful with Calzy. Whether you're a student, professional, or just looking for a better way to manage your everyday math, Calzy is the perfect solution. With its advanced features and gorgeous design, Calzy will quickly become your go-to calculator. One of its standout features is the "Memory Area," where you can store and easily reuse multiple numerical values with just a drag and drop. Another one is the bookmarking feature, allowing you to save any calculation with a title for future reference. Using the latest iOS technology, like Live Activity, Drag and Drop, Haptic Touch, Face ID, and more, Calzy makes mathematical problem-solving a seamless experience. And with privacy being our top concern, rest assured your data stays with you. Key Features: • Memory Area for saving and reusing numerical values • Basic and advanced modes • History and Bookmarking with privacy mode (Face ID support) • Clean, modern, and beautiful design • Privacy-conscious app • Multitasking with slide-over and split view for iPad • Haptic Feedback for a more immersive experience • Tax + and Tax - functions • Quick toggle for decimal and currency rounding • Smart parenthesis • Today widget and iMessage extension • Ability to edit keypad layout • Apple Pencil 2 support and external keyboard support • Dynamic type support for enhanced readability • Custom App Icon support for a personalized touch • Universal app for iPhone, Apple Watch, and iPad • Handoff support, start on one device and resume on another • iCloud sync • Dark and Light modes with multiple color accents • Regional support for countries using decimal commas • Instant calculations as you type • Bookmarks are available in the Spotlight search • Universal purchase for all your devices • Family Sharing support • Localized in Chinese, Japanese, French, Italian, Russian and German Powered by the latest iOS technology, Calzy is the calculator for the new age.

About

Complication Lab

Personalize your Apple Watch and iPhone with custom complications and widgets. Display health data, HomeKit information, and more with extensive customization options. Create an unlimited number of unique setups to match your lifestyle.

Highlights
  • 30+ health data types
  • Apple Watch complications
  • iPhone Lock Screen widgets
  • iPhone Home Screen widgets
  • HomeKit data integration
  • Custom colors and styles
  • Unlimited complications and widgets
Features
Read full description

Complication Lab makes your Apple Watch and iPhone truly yours — now with lock screen widgets and HomeKit data support! • Pick from 30+ health data types, like heart rate, blood oxygen, and more. • Add your favorite health stats to Apple Watch Complications, iPhone Lock Screen Widgets, and iPhone Home Screen Widgets. • Bring in HomeKit data for your Home Screen Widgets. • Personalize every detail with custom colors and styles. • Stay on top of your goals in a way that feels effortless. • Create unlimited complications and widgets—mix, match, and make it yours! Complication Lab is designed to take full advantage of the latest watchOS and iOS features. Your health, activity, and HomeKit data stay on your device. We value your privacy as much as you do. Take control. Have fun. Build the perfect setup for your life.

Screenshots

Calzy4 screens
Complication Lab4 screens

Verdict

The call

The clearest difference is review sentiment: Calzy at 77% against Complication Lab's 23%. Calzy also leads on rating (4.7 vs 3.5) and update cadence (every 2 days vs every 4 weeks). Complication Lab's advantage is price (Free vs $1.99) and iOS requirement (17.6 vs 26.0). On 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

CostPrice · In-app purchases · Ads · Monetization

Complication Lab is free to download; Calzy costs $1.99 up front. Calzy sells 3 one-off in-app purchases and Complication Lab sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calzy holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Calzy has 1.9K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 77% of Calzy's written reviews are positive against 23% of Complication Lab's.

UpkeepUpdate frequency

Calzy ships an update every 2 days, Complication Lab every 4 weeks. The most recent releases landed on September 23, 2026 and September 2, 2026 respectively.

Scorecard8 real differences · 3 level
Calzy versus Complication Lab: the parameters behind the verdict, then further details
ParameterCalzyComplication Lab
Price$1.99Free — better
Rating4.7 (1.9K ratings) — better3.5 (4 ratings)
Positive reviews76.7% of reviews — better22.5% of reviews
Number of ratings1.9K — better4
Update frequencyEvery 2 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#56 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS26.017.6 — better
Further details — not scored
Size66 MB11 MB
Age rating4+4+
DeveloperRaja VijayaramanOlberry

Customer experience

Calzy

All ratings1,899 ratings
Positive92.9%
Neutral1.8%
Negative5.2%
Written reviews584 reviews
Positive76.7%
Neutral7.7%
Negative15.6%

Complication Lab

All ratings4 ratings
Positive50.0%
Neutral25.0%
Negative25.0%
Written reviews40 reviews
Positive22.5%
Neutral12.5%
Negative65.0%

In-app purchases

3 purchases

Calzy

One-time3
  • Small Tip$0.99
  • Medium Tip$3.99
  • Huge Tip$9.99
3 purchases

Complication Lab

Subscriptions2
  • Monthly Subscription$0.991 Month
  • Yearly Subscription7 Days trial$9.991 Year
One-time1
  • Lifetime Subscription$29.99

Questions

Is Calzy free?
Calzy costs $1.99, and also offers in-app purchases.
Is Complication Lab free?
Complication Lab is free to download, with in-app purchases available.
Which has better reviews, Calzy or Complication Lab?
Calzy is rated higher. Calzy averages 4.7 out of 5 from 1.9K ratings, while Complication Lab averages 3.5 from 4 ratings.
Do Calzy or Complication Lab have ads?
Neither Calzy nor Complication Lab shows ads.
Which is updated more often, Calzy or Complication Lab?
Calzy ships an update every 2 days, and Complication Lab every 4 weeks. Most recently, Calzy was updated on September 23, 2026 and Complication Lab on September 2, 2026.

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