Where do I download the Online Sales Pro mobile app for my smartphone? You can download the Online Sales Pro mobile app for your Apple or Android smartphone. Download for iPhone iOS Download for Android on Google Play Related articles How do I set default messages for the click to email or click to text feature for my OSP app? How do I setup my mobile app email? Mobile app text message? How do I join the OSP affiliate program? What tax form do I need to fill out as an affiliate? New to Online Sales Pro? Looking for help getting started?