We've had a few issues recently with pocket money, buying clothes and how fair everything is between them all.
FC gets set weekly pocket money, plus a set monthly clothing allowance (they also get phone credit and savings and well). On top of that if were out and about FC gets treats and bits and bobs the same as my 2.
My 2 don't get regular pocket money or a set amount of £ for clothes each month. They get money as and when they need it and we buy clothes as they're required.
However, if I ever give one of mine money or buy clothes or anything like that, I get told "it's not fair".
For example, DD1 went to the cinema with friends this morning so I gave her £10. FC sees this and wants their £10, despite having already been given their pocket money today. DD2 was taken on a trip out with a friend and friend's parents earlier in the week so I gave her £5 spends for icecreams or whatever - FC wants their £5. At the weekend, I bought DD1 some new leggings as she needed them, FC wants the equivalent in £ otherwise "it's not fair", despite having already had their clothing allowance this month (which is actually 5 times the amount I spent on DD's leggings)
I think they all get treated pretty equally, if I'm out shopping and see something I think FC will like, I'll treat them, they're included in everything we do, they're never excluded. Our families treat them all the same (for example when my Mum visits, if she brings little presents, she buys for all 3)
I've explained to FC several times that my 2 don't get set weekly pocket money, they don't have mobile phones or clothing allowances, so they're not actually getting anything extra that FC isn't, but FC won't accept it.
With things like pocket money/clothing allowance/phone credit, my FC actually gets far more than my 2 put together and the constant "it's not fair" is beginning to annoy me - actually, no, it's not fair, but not in the way FC sees it
I'm not sure I want to go down the road of regular pocket money for my 2 to be honest, but I can't really see any other way around it