How many navigation devices can be connected to this receiver?
The maximum is 4.

How much data will it use when connected to a GSM hotspot?
It will send (upload) around 0,2 MB per hour. The incoming amount of MB per hour (download) is dependent on how much traffic there is around you. If there are 20 aircraft around you for the duration of 1 hour, it will receive around 2 MB.

Is there a way to filter out my own aircraft?
If you do not filter out your own transponder of the aircraft you are flying with, the navigation software thinks there is traffic very close to you. Please log in to the login-page and set your own ICAO code into the receiver. It is also possible to open the User-Interface on the unit itself to change the address.

Where can i find the ICAO HEX code of my transponder?
You can find the ICAO hex code of the transponder your aircraft uses via different websites. Examples: FlightRadar24.com -> Find your aircraft registration. Click on it and when you see the history of the aircraft you will find the HEX code at MODE-S or ADSB.
https://opensky-network.org/aircraft-database → Fill in the aircraft registration. The hex-code will be showed (if available).

Is the use of a cellular hotspot mandatory to use this device?
No, the receiver has an onboard ASD-B receiver. Aircraft that is received will be pushed to your navigation device. You only need an internet connection if you want to share your position with others and to receive Mode-S / FLARM / OGN and ATO traffic.

Can the receiver be connected via Bluetooth instead of Wifi?
The hardware is capable of Bluetooth connections, but is disabled by default. There is no navigation software at this moment (as far as i know) that is able to connect a traffic device via Bluetooth.

I see an airliner flying high in the sky, but i do not see this traffic on my navigation device while the ADS-B LED (3rd LED) is blinking.
In most navigation apps you are able to filter out traffic that is far away from you. It can be changed in the settings of your software.

The 3rd LED (ADS-B) blinks, but i do not see any traffic.
This could be due to vertical filtering like described above or it is a MODE-S data packet. This information does not include a GPS position, only identification and altitude (QNE). This information will only be used when you have enabled a GSM hotspot.

Which navigation apps work with this receiver?
All applications that support the standard GDL90 protocol over Wifi should work. The most familiar programs are EasyVFR, SkyDemon and Foreflight.

Will my GSM hotspot work at higher altitudes?
We have tested up to 5000 ft in the Netherlands and had no connection issues. During flight we could not open any websites on the phone itself, but the small traffic-packets from the ATO went through without any problem. The main reason for this is the use very small UDP packets instead of TCP. UDP has less overhead to send/receive. The reception is dependent on a lot of factors like type/brand of phone, connection via 3G/4G or 5G, the provider, the place where you have your phone stored etc etc.

At startup i see a lot of traffic, but there is none after 10 minutes
When you startup the ATO and have connected it to the internet via your hotspot, it will receive traffic froom the internet streamed to your device. If you do not move at all, the traffic-feed will be interrupted after 10 minutes. The only traffic that you will see is ADS-B traffic that the receiver is receiving directly. If you start to move (taxi or fly) the traffic-feed from the internet will resume automatically.