You can access Teammo from your website browser (e.g. Chrome, Safari, Firefox). No mobile app downloads are required.
Teammo has an iOS mobile app, if you'd prefer to access Teammo that way. You can download it here, or search for 'Teammo' in the Apple App Store. An Android app is coming soon (late 2021).
When you send a payment request to your team members, they do not need a Teammo account to make their payment. They will receive an SMS with a link to make their payment.
Following their first payment via debit or credit card, all future payment requests can be paid by texting a unique code. See below for reference: