What is the mobile phone OS version that Maxi-Cash app support? March 25, 2019 04:02 Updated We support iOS version 10 and above and Android 6 (Marshmallow) and above. Related articles What are the payment options available on the Maxi-Cash App? Can I use Maxi-Cash App to pay for my interest any time of the day? Can I still register if I do not have a Singapore registered mobile phone number? How do I register for iPayment account? Can I use Maxi-Cash app while overseas?