# KeyCa — Calculator + MK + Nixie

> Retro calculator app with authentic tactile and visual feedback. (iPhone/iPad app by 杨 陈.)

- Source: https://appshunter.io/ios/app/keyca/id1665523246 (this page in markdown: same URL + `.md`)
- Developer: [杨 陈](https://appshunter.io/developer/1610898069)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.67/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 5 MB
- Languages: Arabic, Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek and 19 more
- Released: 2023-02-13
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/keyca/id1665523246/reviews.md

## What is KeyCa?

Back to the classic, simplest calculations.

The design is inspired by a 1971 Canon Canola L163 Calculator. Carefully designed and polished as you press and release each key. You will experience the most intuitive and authentic feedback it brings you visually, audibly, and tactilely.

- Simple and sophisticated interface.
- Finely tuned keypad for a truly unique feel.
- Glow tube style display, perfect for mechanical keyboards.
- A variety of exterior styles can be combined and matched.
- Standard calculation functions, as well as history.

## Key features

- Classic calculator design
- Intuitive key feedback
- Glow tube display
- Customizable exterior styles
- Standard calculation functions
- Calculation history

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Edition | $0.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/keyca/id1665523246/reviews.md

### 4/5 — Very cool!

*2023-12-10*

Actual color of Nixie tube orange should be made available.

## Frequently asked questions about KeyCa

### 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, 杨 陈, 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.

## Version history (last 5 releases)

### 1.1.1 — 2023-05-19

- Optimized some code to improve stability.
- Due to heavy aliasing and performance reasons, temporarily suppress the subtle rotation effect when pressing keys.

### 1.1.0 — 2023-03-04

- Added multiple appearance.
- Added reflection effect, which can be turned on or off in the settings.
- Fixed an issue that could cause crashes.

### 1.0.2 — 2023-02-20

- Optimized some UI details.
- Fixed animation bugs in keyboard appearance.

### 1.0.1 — 2023-02-14

- iPad version is now available, so enjoy it.
- Fixed problems such as abnormal interface layout under iOS15.

# If you have any questions or suggestions, you can contact me at any time through email yvenchen@icloud.com, thank you very much!

### 1.0.0 — 2023-02-13

- 1.0.0 official version. The iPad version and more exterior styles will be available at a later date, so stay tuned.

## More apps by 杨 陈

- [instPro](https://appshunter.io/ios/app/instpro/id1610903373)
- [inst Calculator](https://appshunter.io/ios/app/inst-calculator/id1627383430)
- [Nixie Clock Widget](https://appshunter.io/ios/app/nixie-clock-widget/id1640858241)

All apps by 杨 陈: https://appshunter.io/developer/1610898069

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*