Will it look like a real logbook page?
Will it accumulate hours by aircraft type?
Will it accumulate hours such as cross country?
Will it tell you when you need to revalidate e.g.3 t/os and ldgs?
Will it keep track of when medical due?
Will it keep track of BFR due?
Will you be able to log hours as decimal as well as hours and minutes?
Will it allow you to do searches for miscellaneous things like people you have flown with or airfields you've landed at?
And of course the regular things like IMC, Night, Solo, Dual, Single, Multi, Stalls, Aerobatics etc..