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Company
!Calculator
!Calculator

!Calculator

A (not) boring calculator

Not Boring Calculator treats a utility app as a place for personality. Our UX Bites show how it handles edge cases with playful copy rather than error messages.

Key takeaways from 1 UX Bite

  • Calculate a number over 15 digits and you get a written easter egg, not an error

  • A technical limit becomes a moment of surprise, rewarding users who push the app's edges

  • Playful copy makes a utilitarian tool memorable, i.e. personality where none is expected

Often uses:

Happiness & Enjoyment

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Last updated: 27/08/2026
UX Bites

Real world examples

Calculators aren't always boring

UX Bitefrom
!Calculator logo!Calculator
Happier users
BFM+Exclusive
The UI displays a large white "S" centered on a solid purple-blue background, with no additional text, logos, or interface elements visible.The UI shows a stylized "M" logo with teal, cream, and red color blocks on a dark blue background. No text or markings are highlighted or underlined.

There are more than 1400 UX Bites like this

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"An exceptional resource for learning how to build habit-forming products that people love."

The UI contains the yellow book cover "HOOKED" by Nir Eyal in the bottom right, with black text in a white box with blue borders stating "COMPLETELY REVISED AND UPDATED."
Nir EyalAuthor of Hooked

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Steve KrugAuthor of Don't Make Me Think

"The completest view of the psychological underpinnings of human behaviour that I’ve ever seen."

Circular avatar: smiling man, navy jacket, blue‑checked shirt, blurred green bg. Overlays: red EA badge lower-right; black square with white up‑left arrow.
Bing GordonKleiner Perkins & EA

"What a nice idea! Christopher Alexander would be proud to see patterns collected like this."

Profile picture of a man with medium-length hair and stubble wearing a grey hoodie and dark jacket. Two app icons overlay bottom right: yellow Asana and blue Miro.
DHHHey! & Basecamp