To download the Android Executive app you can go to https://play.google.com/store/apps/details?id=com.teamspoor.visits
Please note Android app only supports OS version 5.1 and above. For better performance you will need at least 1 GB RAM on the mobile and at least 100 MB space. The phone should also support AGPS and mobile data.
iOS app can be downloaded on any iPhone with operating system iOS 10 or higher than that. To download the app you can go to your phone's Apple App Store and search for the TeamSpoor app.
You can also download the app directly from the Apple App store by visiting https://itunes.apple.com/us/app/teamspoor/id1284773237?ls=1&mt=8