No. Teammo is not a mobile app. You access the Teammo platform from your website browser (e.g. Chrome, Safari, Firefox). No mobile app downloads are required.
If your team manager requests money from you via Teammo, you will receive an SMS with a link to make your payment. You do not need an account to pay.
Following your first payment via debit or credit card, all future payment requests can be paid by texting a unique code. See below for reference: