I've been on this App for 2 years now and it's really encouraged me to save regularly because I don't have to think about it. You link it to your bank account, set your savings level - low/medium/high and then leave it to do its stuff. It monitors your account in the background and every few days it makes a save. You can easily top up with additional money so I transfer things like premium bond winnings, £25 from the lottery etc. Stuff I'd blow on shit otherwise. It's easy to transfer money back to your current account when you want to withdraw money. I'm in an account earning 1.25%.
The reason I'm telling you this is because they have a 24 hour offer of a free £20 if you sign up to it. I don't get anything from it so it's not a referral code where I also get £20. I'm just trying to be nice and share.
Use the code
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REFMATE21*