Anki Portable is not in PortableApps store unfortunately, so I had to download the official .zip of anki and unzip inside PortableApp folder. To launch Anki you have to provide the location of the data folder on your PC. So I had to provide the data location to Anki, I had to create a anki.bat file with:
start "" /b "%~dp0anki.exe" -b "%~dp0../../Documents/Flashcards/"
Unfortunately .bat cannot be added to PortableApps Platform.
How can I launch Anki from PortableApps Platform with my flashcard data folder ?