Brilliant ideas only happen once in your life. You may have many of them but the likelihood is that each one will only occur to you a single time. If you don\u2019t record it when the brainwave hits, you could miss it.\n\nSo, for all those out there sick of pulling out scraps of notepaper from their pockets without any idea what they mean, meet the app we\u2019re hoping you installed when you first got your smartphone but forget that it\u2019s there to use. It\u2019s time to meet, or reacquaint yourself with, a surefire winner.\nEvernote\nFormat\nAndroid, iPhone, Windows and many more\nPrice\nFree\n\nWhere\nHere\n\nEvernote is a simple enough idea. It\u2019s a cloud-based filing system for notes. It\u2019s a giant, searchable, back pocket with dividers. The phone, pad or desktop app - however you want to use it - allows you to take notes as pictures, written notes, audio notes or you can just upload a file. You give each one a title as you do so and you\u2019re welcome to tag them too. Once you\u2019re done, you hit upload and off they go into the cloud as if you\u2019ve just attached a magical helium ballon. That\u2019s probably how they\u2019d show it in an advert, anyway.\n\nWhile it\u2019s a good service from a laptop, it really comes into its own on your mobile phone. You can take a photo of something you see that inspires you when you\u2019re out on the hoof, or perhaps a Christmas gift idea or maybe just a ticket confirmation number or something that you\u2019ll need later. It\u2019s not hard to think of times where it comes in hand, you just have to remember that you have this service in your pocket in the first place. Best of all, of course, it\u2019ll cost you nothing to try it out. Make sure you do.Seen an app that you think should feature in App of the Day? Let us know.