![](../common_app_pic/TAB.png)
A game where you tap all the balls to make them disappear. There are rules for the order of erasing. Finding the order is the key to the game.
![](../common_app_pic/SBT.png)
This is a cassette player for albums.I have reproduced experiences of listening music with a cassette tape.
![](../common_app_pic/LT.png)
An app to learn the basics of ladder logic, which is a graphical programming language. Free version available.
![](./img/AS.png)
This is a slider for low volume that allows more precise control than the iPhone's side buttons.
![](./img/AUS.png)
Quiz to guess the state of the United States. The surrounding states are shown. Guess based on that.
![](./img/AJP.png)
Quiz to guess the prefecture of Japan. The surrounding prefectures are shown. Guess based on that.
![](./img/FS.png)
This app helps you learn how to calculate questions about distance, time and speed with animation in which a car is running.
![](./img/FSC.png)
Given two of the distance, time, or speed, you can calculate the other one.
![](../common_app_pic/NT.png)
This is a music sequencer using numeric data. This app is for making MIDI data to send to an another app applied to virtual MIDI.
![](./img/MHT.png)
This is an application that actually tries to do the Monty Hall problem. Two people play the role of a host and a challenger. The player (the host) chooses the winning door, which gives a more reliable game.
![](../common_app_pic/WF.png)
This app displays kanji, emoji, or other characters in large size. I made this to help you look up kanji you can't write. This is especially useful when you use an iPad and display this app on one of the two windows.
![](./img/KG.png)
The app analyzing the popularity of kanji.
![](../common_app_pic/PP.png)
This is an app for Kyotsu Test, the test widely used in Japanese university entrance exams, dealing especially with probability problems in mathematics.