# CAL_: Logging Calculator — Currencies, Logs, and More!

> Currencies, Logs, and More! (iPhone/iPad app by SQUAIR Inc..)

- Source: https://appshunter.io/ios/app/cal-logging-calculator/id1162347956 (this page in markdown: same URL + `.md`)
- Developer: [SQUAIR Inc.](https://appshunter.io/developer/1162347955)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 9 MB
- Languages: American English, Japanese
- Released: 2016-10-11
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/cal-logging-calculator/id1162347956/reviews.md

## What is CAL_?

CAL_ is the next evolution of calculators. Made especially for iPhone, it brings the venerable calculator to an all-new level.

LOG FEATURE
All of your calculations are logged, so you can refer to them at any time. Use the ANS key to bring up the most recent result from the log. You can toggle commas and decimal points, and also use a guide that shows you when your units are in the millions, billions, and beyond.

CURRENCY CONVERSIONS
Get real-time currency rates for up to three currencies at once. You can also see a graph of currency value fluctuations.

UNIT CONVERSIONS
Want to know how many Tokyo Domes there are to an acre? Or how many lbs make up a stone? It's right at your fingertips in CAL_.


## Version history (last 5 releases)

### 1.2.3 — 2026-02-06

Keyboard operation now possible on Mac, voice input for key presses

### 1.2.2 — 2026-02-05

【Currency Conversion Improvements】                                     
  ・Upgraded to a new exchange rate API for better reliability             
  ・Full support for real-time conversion of 30 currencies                 
  ・Improved chart display stability                                       
                                                                           
  【Security Enhancements】                                                
  ・Enhanced communication security (TLS 1.2)                              
  ・Compliance with latest iOS security standards                          
                                                                           
  【Stability Improvements】                                               
  ・Optimized for iOS 12 and later                                         
  ・Various bug fixes

### 1.2.1 — 2018-07-24

This app has been updated by Apple to display the Apple Watch app icon.

Minor adjustments.

### 1.2 — 2018-07-20

Various minor adjustments.

### 1.1 — 2018-07-16

Bug fixed related to currency conversion.

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| [LRTK](https://appshunter.io/ios/app/lrtk/id1641216786) | — | Free | Productivity |
| [Koyomi (Calendar)](https://appshunter.io/ios/app/koyomi-calendar/id1105884989) | — | Free | Productivity |

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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 2026-09-17.*