The iPet App made for Petrek GPS & Petrek 3G units and the SafeTrek app made for Petrek GPS-4 works on both iOS and Android based phones. It is highly recommended that you have a newer phone with at least 1.5ghz dual core processor and 4gb ram to run smoothly. The iPet and SafeTrek Apps have minor distinctions between iOS and Android versions, but their functionality and logic remain consistent. Settings: (the three dots on top right corner) LBS location – We highly recommend this to be UN-ticked to save confusion.  If this is left enabled, you may get an updates miles away via cell tower whenever the device is indoor, under cover, and/or your dog/cat is lying on the ground with the device wedged between it's body and the ground.  Make mode: Make sure this is set on hybrid.  Alarm settings – This is required if you’d like to be alerted via notifications on your smartphones for when your Petrek GPS requires charging or when your pet triggers the Geo-Fencing/parameter alarm. Once ticked you can choose the notification/alarm sounds that you want via your smartphone’s own setting menu under “notifications” Note that for iPhone users,  your Alarm notification settings is under "Geo-fence settings" and "Enable notification" Geo-Fencing / Parameter alarm: (Slide left menu/ or press top right icon) Once Geo-fencing is set, you can easily move the circle parameter around via putting your finger on the centre grey pin point and then move the circle around. This is particularly useful especially if your pet normally escapes through one area whether it’s the front door and back fence. You can move the line of the circle to just outside of that fence etc so you may get alerted earlier. the + – logo on the outer circle can be used to adjust the diameter. Note:Parameter alarms are triggered depending on the update modes. If on urgent you will get an alert within 30 seconds provided there is GPS and GSM reception. If on normal mode you will be alerted within 5-10 minutes depending on when the pet leaves the parameter after it’s last update. If on Power saving mode it will alert you every 2 hours should the Petrek find your pet outside the parameter on that update interval, provided there is GPS + GSM signal at the time of update. When in power saving mode, the App will immediately change to normal  tracking mode, provided there is relevant signals at the time.  False alarms can be triggered from time to time due to sway/weak GPS signals so if this is the case please extend your Geo-fencing circle. We highly recommend using Normal mode on the first month if you have a naughty pet that moves very fast. Only use Power saving mode when you know your pet’s territory and where it goes during the day. Searching Mode: (location update frequency) Urgent mode = 30 seconds, battery life = 3-5 hours depending on GPS and GSM reception and your pet’s activeness. Best used only in an emergency when you need to zero in on your pet. Normal mode = 5-10 min, battery life = 7-10 hours depending on GPS and GSM reception and your pet’s activeness. Best used for escape artists that do wander off frequently or when you want to have a good idea of where your cat roams during the day. Power saving mode = 2 hours, battery life = 2-4 days dependent on GPS and GSM reception and your pet’s activeness. Best used for pets you have tracked for few weeks with a good idea of their habitual spots. You can set a Geo-fencing parameter in the area and still get alerted if they decide to go further than they normally do one day, this will switch to normal mode if it is triggered to help you get them back quicker, you can also change to urgent mode immediately. Note: If you are in power saving mode, as it will be doing it’s best to save power, you may have to wait up to 2 hours for the tracker to adjust to another searching mode. If you have your Petrek GPS around you can change the setting immediately by turn the tracker off and on after changing the search mode. If your pet is missing, just set Geo-fencing parameter alarm, and set to urgent first and wait for notification. As long as tracker is charged prior you will get an update within 2 hours or less, in most cases normally within 1 hour.