I use GPS measurement to record Family History related locations. I want to pass onto succeeding generations, item locations that may be lost sometime in the future. Hence GPS seems to be more time proof than an address (street names might change over time, road location might change, cemeteries might be redeveloped thereby negating current row and grave numbers, etc). It seems to me that 3 metre accuracy is adequate to locate a building, but to locate a grave I need 1 m. GPS Status often reports 3 m accuracy, but I need improved methods and/or hardware to get 1m accuracy.\n\nOver the last 10-years I have used several devices, 1st a Garmin nuvi 500 (it didn't seem to give good results), later several phones. I currently use a Samsung S20 FE 5G, on the Telstra network which is claimed to have the best network coverage of any network in Australia. A lot of my measurements are made in country areas.\n\nI realise the Australian tectonic plate is one of the fastest moving plate on our planet ~6 cm pa (6 metres per century) (and different parts are moving in differing rates or directions). So I record date of measurement and ellipsoid, reported accuracy, in addition to Lat and Long.\n\nAt present I have the GPS Status App installed on the phone. So 2 rather different questions:\nQ1) What GPS App gives good accuracy, and hopefully reliable error estimates?\nQ2) Am I correct the GPS Status App uses the WGS84 ellipsoid?