Calculators aren't always boring

If you calculate a number bigger than 15 digits on the “Not Boring Calculator”, they’ll show you a written easter egg.

AI insights

User Delight is about adding small, joyful moments that boost happiness and make the app memorable. Here, the calculator’s easter egg rewards playful users, making the experience feel special.
Curiosity Gap describes how incomplete or unexpected info sparks interest. The hidden message for huge numbers surprises users, nudging them to explore and discover more fun in the app.
Art of Fauna uses literal easter eggs as hidden rewards, just like the calculator’s playful messages. Both create surprise moments that motivate users to poke around and enjoy the experience.
Ahead offers mini games as a reward for completing lessons, similar to the calculator’s easter egg for unusual actions. Both use fun surprises to celebrate non-standard user behavior.
Etsy’s earnings calculator adds dynamic, context-aware tips when users hit unusual numbers, just like the Not Boring Calculator’s big-number jokes. Both use dynamic content to create delight and reinforce brand personality.