Instead of just having the option of multiplying round ups, i wish you had the option to round to the 1 significant figure.
So:
Keep the minimum rounding to a £ tho x
Far too many rules required here to make it practical.
You spend £3.50 on a coffee and it rounds up to £800? Yikes.
A % could be better, like 5% every spend or so. Not sure any bank has that.
One rule, one significant figure, simple!
You buy a £3.50 coffee for £4, a £16.50 takeaway for £20, a £97 item for £100. Easy.
Your % idea doesnt simplify the number but it does scale savings nicely.
This would just confused the heck out of me.
Yeah too complicated. Especially if you only have £18 in the account and you’d end up overdrawn. If you want to add more in just transfer to the pot. I wish when I did faster payment transfers to my credit cards they would round the odd pence up as if it was a debit card transaction but it doesn’t 
Well you’d just turn it off when you’re running low, right?
Its just rounding up the first digit…
Its just rounding to the first number.
The reason is that putting aside 1p on £749.99 seems a bit pointless. With your 5%, it’d be a £787.49 cost whereas with mine its £800
With paid plans you can do 2x, 5x, 10x roundups. Set aside more but keep it to a reasonable level. For the majority of people, spending (for example) £101 and having £99 added to your roundup pot isn’t sustainable over multiple transactions.
The thing is, this isn’t a round-up. I’m here for this idea - perhaps with an option to round to the nearest pound, £5, £10 etc.
Understand your meaning I think (2x etc. doesn’t round to a round number).
To the nearest £5 or £10 is more reasonable but I still think the adoption rate would be very low.
To me (others may disagree of course) the whole point t of roundups is small amounts you barely notice adding up to a nice sum over time. Putting larger sums away comes under the banner of actual “savings”.
It’s not though is it, roundup to the next number of a £1.49 spend would take it to £2.
Same goes for a £749.99 spend, it’s £750.
I really do not understand your logic for your request, and I doubt monzo will even consider entertaining such.
Yeah, there are going to be those extremes but for most should be fine - feel like prices usually approach the next significant figure rather then are just over but it would happen.
The issue with the x2/5/10 is that a £1.50 item would come out to £6.50 (with the x10) but a £749.99 puts 10p aside.
Its not perfect but it offers the same nice round numbers that round up offers but for larger purchases.
They are asking for the next significant digit - so £749.99 would round to £800. Basically round up the first digit of the amount. I personally think it is a good idea - I agree that enabling bigger round-ups on bigger purchases makes sense, and I would definitely use it if it was an option.
This would only really work for those who have ample spare cash to save, it’s not much a make money for for everyone.
Rounding up £50 on a £749 spend 
What would a purchase of £700.01 be rounded up to?
I thought roundups were similar to the 1p challenge
It’s small amounts that you don’t notice that get people into the habit of saving which they’ve typically struggled to do.
Is rounding up at this scale not too niche? If I consistently had £100’s (if not thousands) spare at the end of each month I’d be setting up transfers to savings accounts, investing or using salary sweep.
That would of coruse be rounded up to £800 as well. There are options to mitigate that of course - you could set a maximum round-up amount for example. But I imagine this would just be another round-up option, like the current 1x/2x/5x/10x/etc. No one would be forced into it, but it would be a nice option for those who do have a bit more spare cash to save.
Which is ridiculous for the vast majority of customers, so it’ll never happen!
What happens with a 1p purchase with x10? You’d pay £9.91 for that and proportionally, that is far worse.
Its not like round ups deletes your money. If it was bigger then you expected, if you are overdrawn etc; you can always just put it back into your main account.
Proportionately it’s bigger (especially for a £1.01 payment), but would never exceed that amount.
Whereas, you could be getting 2, 3, 4 etc. figure roundups which is ridiculous.
As has been pointed out, the purpose of roundups is to nudge small(ish) amounts aside without really noticing, which over time add up to something more.
If you’re getting into putting tens, hundreds, or thousands of pounds aside, that’s definitely more in the realm of conscious savings activity for the majority of people - particularly for hundreds and above.