Comparison

Calculator Smart vs Ez Bill

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

Head to head
About

Calculator Smart

This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.

Highlights
  • 30+ scientific operations
  • Degrees and Radians support
  • Parentheses and nested equations
  • Intuitive input with slide-to-delete
  • Copy & Paste results
  • Apple Watch app and Lock Screen Widget
  • Colorful skins and custom icons
Features
Read full description

Calculator Smart is the most powerful and precise calculator for iPhone, iPad, and Apple Watch — built for everyday math and advanced scientific computations alike. Whether you need a quick percentage or a complex nested equation with parentheses, Calculator Smart handles it all with a clean, modern interface and lightning-fast big buttons. Scientific & Standard Modes • 30+ scientific operations including trigonometry, logarithms, and more • Degrees and Radians support • Parentheses and nested parentheses for complex equations • Output in Decimal or Scientific Notation (mantissa/exponent) Intuitive Input • Slide to delete wrong digits instantly • Double-tap or long-press to Copy & Paste results • Full External Keyboard support (Bluetooth & Smart Keyboard) • Three-digit grouping with locale-specific decimal and thousands separators Cross-Platform & Widgets • Apple Watch app with Complication shortcuts • Lock Screen Widget — calculate without unlocking your device • Messages Extension — share results directly in conversations • Multitasking: Slide Over and Split View (iPad) Personalization • Colorful skins to match your style • Custom App Icons that match your chosen skin • Button sound feedback for a satisfying tactile feel Universal Purchase — buy once, use on all your Apple devices. Download Calculator Smart for FREE today!

About

Ez Bill

Effortlessly split bills and calculate tips with friends. This app simplifies group dining by automatically calculating each person's share, including tax and customizable tip percentages. Enjoy a user-friendly interface designed for low-light environments.

Highlights
  • Calculate individual bill and tip amounts
  • Pre-tax tip calculation
  • Split bills with up to 30 people
  • Customizable service-based tipping
  • Automatic US sales tax calculation
  • Today screen widget for quick access
  • Customizable backgrounds and tip labels
Features
Read full description

Your bill, lickety split! Ez Bill is the best way to end a meal with friends on a sweet note. With a few taps and swipes, you and your friends will know what each person's bill and tip should be. And because no one likes staring at a bright screen in a dim room, we've designed this app so you'll look cloaked in candlelight as you split the bill. You're welcome. • Calculate each person's base bill and tip amount • Tip should be calculated pre-tax. We do all the hard work for you, so you can be sure to always tip the right amount. • Split bill with up to 30 people • Customizable service based tipping with a fun touch • Automatically get the sales tax values anywhere in the US • Load the tip calculator on the today screen for your convenience How easy is Ez? When you fire up the app, type in your total bill. Then tap the face and person icons to swipe your way to the appropriate tip and the number of diners. It's that easy! And for all you people who like things even more nice and neat, Ez Bill can split your bill with a rounded tip amount or rounded total. Now, even though we created Ez Bill to help you make sure everyone pays the same, we know you don't necessarily want your apps to look the same. So, we offer great customization options: • Choose your preferred background • Manage your default tip percentages • Choose your own tip labels • Set your custom sales tax percentage

Screenshots

Calculator Smart4 screens
Ez Bill4 screens

Verdict

The call

The clearest difference is review sentiment: Ez Bill at 90% against Calculator Smart's 36%. Ez Bill also leads on in-app purchases (none vs 3) and ads (none vs shown). Calculator Smart's advantage is rating (4.7 vs 4.4) and ratings volume (498 vs 37). On price 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

Both are free to download. Calculator Smart sells 3 one-off in-app purchases. Ez Bill asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculator Smart holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Calculator Smart has 498 ratings behind it against 37, so its average is the more settled of the two. Written reviews complicate that: 36% of Calculator Smart's written reviews are positive against 90% of Ez Bill's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calculator Smart ships an update every 4 months, Ez Bill every 3 weeks. Both last shipped on November 1, 2026.

Scorecard9 real differences · 1 level
Calculator Smart versus Ez Bill: the parameters behind the verdict, then further details
ParameterCalculator SmartEz Bill
PriceFreeFree
Rating4.7 (498 ratings) — better4.4 (37 ratings)
Positive reviews36.4% of reviews89.8% of reviews — better
Number of ratings498 — better37
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Mac, Apple TV, Apple Watch — betteriPhone, iPad, iPod, Apple Watch
Requires iOS13.010.0 — better
Further details — not scored
Size24 MB47 MB
Age rating4+4+
DeveloperMiroslav OtsedarskiStefano Acerbetti

Customer experience

Calculator Smart

All ratings494 ratings
Positive93.1%
Neutral1.2%
Negative5.7%
Written reviews22 reviews
Positive36.4%
Neutral27.3%
Negative36.4%

Ez Bill

All ratings32 ratings
Positive84.4%
Neutral6.3%
Negative9.4%
Written reviews49 reviews
Positive89.8%
Neutral2.0%
Negative8.2%

Bugs and requests

Calculator Smart

Not enough reviews yet to summarise bugs or requests.

Ez Bill

Reported bugs

10 issues
  • Math is wrong (e.g., 20% of $90 is not $16.59)
  • Not pulling correct, current meal tax for CT
  • Tip showing correctly issues on Apple Watch
  • App locks up on Apple Watch
  • Cannot see screen to adjust tax rate on Apple Watch
Show 5 more
  • Switching between percentages with swipe is too sensitive
  • Widget defaults to party size of 5
  • Number pad on watch is not easy to interact with
  • Does not make use of entire screen on Series 4 watch
  • App assumes tax is already calculated, no option to add tax to subtotal

Requested features

10 requests
  • Add widgets
  • Manually set CT meal tax
  • Option to input untaxed amount and then tax/tip
  • Include total tip and total bill
  • Default widget party size to 1
Show 5 more
  • Rounding options (next dime or half dollar)
  • Input party size manually
  • Allow fractions or decimal amounts for gratuity percentage
  • Round up option on Watch App
  • Include sales tax on prepared meals per state

In-app purchases

3 purchases

Calculator Smart

One-time3
  • Colorful Skins and Remove Ads$1.99
  • Colorful Skins$1.99
  • Colorful Skins for Mac app$1.99
None

Ez Bill

No in-app purchases

Questions

Is Calculator Smart free?
Calculator Smart is free to download, with in-app purchases available.
Is Ez Bill free?
Ez Bill is free to download, with no in-app purchases.
Which has better reviews, Calculator Smart or Ez Bill?
Calculator Smart is rated higher. Calculator Smart averages 4.7 out of 5 from 498 ratings, while Ez Bill averages 4.4 from 37 ratings.
Do Calculator Smart or Ez Bill have ads?
Calculator Smart shows ads; Ez Bill does not.
Which is updated more often, Calculator Smart or Ez Bill?
Calculator Smart ships an update every 4 months, and Ez Bill every 3 weeks. Most recently, Calculator Smart was updated on November 1, 2026 and Ez Bill on November 1, 2026.

Other comparisons