iPhone Screenshots


Need a gorgeous calculator that works? Want real buttons that feel like they're being pressed? Doesn't your iPhone deserve the BEST?

Before LCD, LEDs and CRTs, computer numbers were first digitally displayed using Nixie Tubes; neon-filled glass vacuum tubes containing individual filaments for each digit. Impress your friends with the retro vintage amber glow, with realistic flickering effect, that charms such hardware hackers as Steve Wozniak (wearer of a Nixie watch http://www.youtube.com/watch?v=m4R3hODnTGo).

A simple but clean and tidy app, designed to be your favourite calculator for those times you just want to enjoy what you are looking at.

iPhone 5 users get an extra row of calculator functions.

User Reviews:

Best calculator app! - Love this calculator. The design is awesome! Simple and refined in its functionality.

Very nice! - This app is gorgeously rendered. It looks absolutely stunning.It is replacing my stock calculator app from now on!

Amazing - Truly the most beautiful calculator app I've found yet!!! And it's even Canadian!

MONO1 is a special project of Monolith Interactive Inc. We create beautiful & precise apps in Waterloo, Ontario.

What's New

Version 1.3.2

• Minor icon updates

Customer Reviews

Very nice!


This app is gorgeously rendered. It looks absolutely stunning.
It is replacing my stock calculator app from now on!



Simple and beautiful. Works great. Best looking calculator in the app store, if you like Nixie tubes or not. Excellent job.


Monolith Interactive, Inc.
3.3 MB
Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.
English, Catalan, Czech, Danish, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Traditional Chinese
Age Rating
Rated 4+
© Monolith Interactive 2012


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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