Look on the bottom of the pedals for a QR code, some manufacturers put the app link either there or on the box or in the owner manual. The IPS website is crappy, clicking on the app link doesn't work.
I found a link at the Singapore official distributor for the Lhotz and Zero apps, but not the I5 or S5. If you don't find the app where I suggested looking, you could try one of the other IPS apps, maybe they will work. https://ipswheel.asia/app-download.html
@IPS Malta might have a link, but hasn't visited since late September.