What Navigation APPs are available ?

Most (if not all) Smart Phones and Tables have a Built-In GPS receiver, So can you use these devices to perform Satnav / Navigation functions ?, the answer is yes, as long as you have the correct App. installed, The vast majority of these devices run either Android or Apple's iOS operating systems, here is list of available Apps, (Note not all Apps are available on both platforms and not all are downloadable for free :-

OsmAnd uses free to download Open Street Maps and performs many Satnav like functions while working independency of the internet or a Cell Phone connection - Free version

Waze uses online maps to display your position and can show live traffic congestion data - Free

ViewRanger Outdoor GPS • Routes • OS Maps for iOS only

OruxMaps You can use OruxMaps for your outdoor activities, android only

Gaia GPS Trail Maps, Ski Touring, 4x4 Offroad App - Free

Topo GPS Ideal for hiking, mountain biking, horse riding, speed cycling, kayaking, geocaching, scouting and other outdoor activities - Free