Application made thanks to android studio. To use it, branch a Mobile phone using android or install an Android emulator. Then launch the project on android studio and run it on the platform you want. One the app launch you have a menu bar with 2 icons. The first one is a go-back arrow. It allows you to get back to your last display. For exemple you are on the about page and you want to go on the one you were before this one, you just have to click on it. The other button is the query icon. Thanks to it we can have access on details for who did the application and how to contact him. Then you have two spinners displayed on the screen, the first one is for the entry currency and the other one for the end currency. Then you tape the amount you want to convert and then a new pair of rectangle should appears, the first one is the convertion and the second one the date you made it.