Very cool!
Actual color of Nixie tube orange should be made available.
Archived App (Last seen on 12 May 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Experience classic, intuitive calculations with a design inspired by a 1971 calculator. Enjoy authentic visual, auditory, and tactile feedback with a finely tuned keypad and a glow tube style display.
βClassic calculator design
βIntuitive key feedback
βGlow tube display
βCustomizable exterior styles
βStandard calculation functions
βCalculation history
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What's New in KeyCa
1.1.1
May 19, 2023
- Optimized some code to improve stability. - Due to heavy aliasing and performance reasons, temporarily suppress the subtle rotation effect when pressing keys.
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In-App Purchases
$0.99
Premium Edition
Premium Edition
User reviews
Developer apps
FAQ
What is KeyCa?
KeyCa is a calculator app designed with a classic aesthetic, inspired by a 1971 Canon Canola L163 Calculator. It focuses on providing an intuitive and authentic user experience through visual, auditory, and tactile feedback.
What kind of feedback does KeyCa offer?
KeyCa provides finely tuned keypad feedback for a unique feel, along with visual feedback that mimics a glow tube display. This aims to replicate the authentic experience of using a classic calculator.
Can I customize the appearance of KeyCa?
Yes, KeyCa offers a variety of exterior styles that can be combined and matched, allowing you to personalize its look to your preference.
What calculation functions are available in KeyCa?
KeyCa includes standard calculation functions to perform basic arithmetic. It also keeps a history of your calculations for easy reference.
What devices is KeyCa compatible with?
KeyCa is available for iPhone, iPad, and iPod devices, running on iOS.
How often is KeyCa updated?
KeyCa was last updated on May 19, 2023, with version 1.1.1. The developer, ζ¨ ι, has released updates to improve the application.
What is the age rating for KeyCa?
KeyCa has an age rating of 4+, making it suitable for a wide range of users.
Does KeyCa have ads?
No, KeyCa is ad-free, allowing for an uninterrupted calculation experience.