I had a look at
Flight radar and
The flight tracker as a way to stay up to date on our flights, but in the end I settled with
Onlyflights, which was way easier or user-friendly to use.
Onlyflights sent me notifications when (online) check-in and boarding were due, alongside information about potential delays and the gate,
which was even better and more accurate than Flight Tracker provided.
And it was also much cheaper than the other alternative, costing only 1.99€ for a month.