SPIKE FOR SMARTPHONES -quick-release clamp for easily taking the device on and off smartphones -Device Must be able to measure an object by taking a photo with your smartphone -Device must support design, architecture/engineering/construction, and GIS software, including Collector for ArcGIS, Survey123 for ArcGIS, AutoCAD, ARCHICAD, Adobe Illustrator, CorelDraw and Flexi. -device must be able to pair with your smartphone via Bluetooth. -Device Must work together with your tablet's camera, GPS, compass and Internet connection. -Device Must be compatible with both Apple iOS and Google Android SPIKE FOR TABLETS -comes with adhesive tape for attaching Spike to your own tablet case -Device Must be able to measure an object by taking a photo with your smartphone -Device must support design, architecture/engineering/construction, and GIS software, including Collector for ArcGIS, Survey123 for ArcGIS, AutoCAD, ARCHICAD, Adobe Illustrator, CorelDraw and Flexi. -device must be able to pair with your smartphone via Bluetooth. -Device Must work together with your tablet's camera, GPS, compass and Internet connection. -Device Must be compatible with both Apple iOS and Google Android