Same principle as MrsWobble (how are you, MrsW, haven't seen you around for ages), for ds (six).
Instead of handing over the money, (which tends to get gloated over for half an hour & then lost somewhere) we do it as an "entry" in a little book; also then when he actually gets round to wanting something he's usually built up a little stash.
DS1 (7) gets a pound a week as well, although it actually gets noted in his "Cash book" and he can then use that amount at a later date when he wants to buy something. Four pounds seems like far too much at that age.
Dd is also 7 and gets £1. 10 year old ds gets £2. To be honest he's the only one who cares as he nearly always has something he wants to save up for, she forgets all the time. I would definitely say £4 was excessive (sorry Mr Batters).
I would give £2. She could actually buy something small eg. an inexpensive toy or a magazine with that, whereas £1 is more likely to just get spent on sweets, don't you think? Of course, you may not mind what she spends it on anyway.
How often do you expect her to tidy up, and how likely do you think it is that she will tidy up (how good is she at the moment?) If you are going to use it as a reward, then you should probably do it as a multiple of 7 - otherwise what will you deduct if she doesn't do it? Also what sort of things does she like to buy?
We've been thinking of it for ds (6) who's not that likely to always earn it, and likes beyblades etc. We were thinking of 50p a day, so closer to your dh, but not expecting him to get that much on a regular basis. Like the idea of the book though, we could get away with less if we did that (and he also plays with and loses his money).
dd on the other hand is satisfied with much less (although has a very sweet tooth) so we could give her less, but she's only 16mths younger than ds, so we'd probably need to give them the same amount.
The other thing I guess to consider, is would you get her less things if she had her own money? How often does she get treats, and what do they cost? Then you could balance it up, if you see what I mean
We haven't got into pocket money, but my friend has an 8 year old who does. She gets £2 per week. For that she must make her own bed, fold her pjs and open the curtains. She gets a 10p fine if she doesn't. She can also be fined for truly bad fighting with her brother etc, but can win it back. She uses it to buy non essential toys, you know those things we think are a waste of money but they love, sweets etc
My dd aged 8 has just have a rise from £1 to £2. For thiis rise she has to have her bedroom tidy on a Saturday (previously she did this for the priveledge of watching Dr Who but the series finished!!) I must admit she does save money better now as she can see that that £5 note or even £10 note is achievable so doesn't waste it.