"Experiment on distance registering: Actual Distance vs App Only vs Go+"

#PokemonGO: Disclamer: This is just an experiment, that reflects only my experience. It can't be taken as a proper study. Data are insuffiscient, and many factors I haven't taken into consideration may affect the results.General:The device used is an iPhone 7 on iOS 10.1. App version is 0.49.1.Wifi off, BT on.I choosed areas that have good cell phone coverage.Both path are located in urban areas, surrounded by buildings (2-6 floors).Never went over the speed cap (10.5 km/h - 6.2mph).Stopped for +5 minutes at each start/stop, restarted phone and app.Path 1:Map: http://ift.tt/2hs4uQe according to Google Map.Mosty long straight lines, with a few turns.Driving, 8-10 km/h (5 - 6 mph).This part of the experiment had several goals: testing a path with mostly straight lines, and see if being just below the speed cap had an effect on the registered distance.I chosed to do it by car because I wasn't sure I could always stay under the speed cap while running.I chosed that path because there is no traffic at all on week days at night, and because I can easily pull to the side even if anyone shows up. This way I could drive at really low speed without blocking anyone. In the end I didn't see any other car while I was performing the experiment. Of course phone was out of my reach while I was driving. Picked it up only when parked.Egg at start (Go+): http://ift.tt/2hDoXj4 at end (Go+): http://ift.tt/2hsdKE6 at start (app only): http://ift.tt/2hDfBnz at end (app only): http://ift.tt/2hsaXKY distance: 1.1kmRegistered distance with GO+: 0.98km (89%)Registered distance app only: 0.96km (87%)App only registered 97% of the distance registered with Go+.Path 2:Map: http://ift.tt/2hDiTHn (x2) according to Google Map.Perfomed 2 "laps" each time.Short straight lines with turns.On foot, 4-5km/h (2.5 - 3 mph).This part of the experiment was to compare the previous path to one with more turns.As I was walking, this time I also double checked the distance given by Google Map with the Health app on iOS.Start first run: http://ift.tt/2hs66tr between runs: http://ift.tt/2hDfAA1 second run: http://ift.tt/2hsdncu registered by Health was 1.05 km on first run (with Go+) and 1km on second run (app only).Egg at start (Go+): http://ift.tt/2hDhQav at end (Go+): http://ift.tt/2hs87G7 at start (app only): http://ift.tt/2hDkUDD at end (app only): http://ift.tt/2hsaWad distance: 1km - 1.05kmRegistered distance with GO+: 0.92km (88-92%)Registered distance app only: 0.93km (89-93%)This time the app alone registered 1% more than when using the Go+.Conclusions:Around 90% of the distance travelled has been registered in-app, in every situations.Although there are small differences in registered distances between path 1 and path 2, or between Go+ and no Go+, these differences are very minor (1-3%) and might not be significant unless they can be replicated.Going at walking speed (4-5km/h) or just below the speed cap (8-10km/h) didn't make any significant difference in registered distance.One common assumption is that GO+ allows better distance registering. This experiment wasn't able to verify this assumption, as it registered slightly more on one path (+3%), and sighlty less on the other path (-1%).Notes for future experiments:Does cell phone coverage influences registered distance?What are the effects of crossing the speed cap on registered distances?TL;DR: During this experiment, 90% of traveled distance was registered in-app, with or without Go+, on both a turny path and a straightish path. Speed (below speed cap) didn't make any significant difference.edit: speed conversions via /r/TheSilphRoad http://ift.tt/2hT4mXf