Type a registration and get the airframe behind it: serial number, when it was delivered, who flies it now, and whether it is still working for a living.
Airframe data from AeroDataBox, photographs from Planespotters.net. Status is checked against our own records where we hold them.
Keep a record of what you have seen
Spotter is our Windows logbook. Look up a registration, mark it seen, and it keeps the type, airline, photos and place alongside it. One payment, no subscription.