No, that's not possible. When logging into https://app.approvalmax.com/ from a mobile device, you'll see a “Please download our app” page - there is no alternative.
Please note: ApprovalMax does not support mobile viewing via a browser; everyone must install the app.
We support only very few scenarios on mobile devices without the app being installed, like:
Accept an invitation
Approve/reject a request by using a link from the email