One of the EASA/FAA recency requirements to legally operate an aircraft in commercial air transport or carrying passengers is to have performed 3 takeoffs and 3 landings in the preceding 90 days on that aircraft type.
3in90 lets you do just that. For free.
Everything you need, and
Being pilots ourselves, we built this one-trick pony to do exactly what it says: By entering the dates of your takeoffs and landings, this app gives you an easy to interpret preview of when your next ones are due.
Hang on, there’s more
Substandard is not our only aviation tool.
Have a look.
Applying cold temperature
Pilots are required to apply appropriate corrections to altitudes when temperatures are below ISA, so that the required clearance above terrain and obstacles are achieved.
SubStandard lets you track just that. For free.