Apps by Kei Suefuji
Time Calculation app icon

Utilities

Time Calculation

Kei Suefuji

$1.99 2.00 · 1 storefront · 1 rating In-app purchases unconfirmed
Open on Apple

About this app

Time Calculation is an application that makes it easy to add and subtract time. With this application you can easily calculate hours: minutes without having to perform troublesome calculations to round up or round down minutes by yourself every 60 minutes. You can copy the calculation result.You can also check the calculated results and the formula history. Please input hours and minutes in the order "hour", ": (colon)", "minute". ■ "Arrow" button You can move the cursor position when entering calculation formula. Please use it when modifying the formula. ■ "DEL" button Delete one letter at the position of the cursor of the calculation formula you are entering. If the cursor is at the back, you can delete the previous character. ■ "AC" button Delete all entered calculation formula and calculation result. ■ "Copy" button When calculation is completed, a square "Copy" button is displayed to the left of the calculation result. By tapping "Copy" button, you can copy the calculation result and paste it as text data to other application. ■ "Clock" button You can see 10 histories of calculation results and calculation formulas. When it reaches more than 10, it will be deleted from the old history. In addition, you can delete the history by tapping "Trash can button" next to each history.

Latest release

What’s New

Version 2.1.0 Jan 19, 2026

Minor improvements.

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
1 ratings
1 Aug 13, 2026 · 1 ratings Aug 13, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current $1.99
Historical low USD 1.99
Paid → free
Price history
Current $1.99
$1.99 $1.00 Free Aug 13, 2026 · $1.99 Aug 13, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 13, 2026 · 4:18 AM $1.99

Screenshots

Time Calculation iPhone screenshotTime Calculation iPhone screenshotTime Calculation iPhone screenshot Time Calculation iPad screenshotTime Calculation iPad screenshotTime Calculation iPad screenshot