I have an Audible subscription at £8 and a Readly subscription at £10/month. The Readly is unlimited and the Audible is one book, but they also do lots of free members-only books, some of which are excellent, and some other shows and podcasts. I find I'm not using the Readly subscription a great deal now. I read a lot when on holiday or by the pool (live overseas so this happens more often than you would think!) but much less at home, which contributes to the limited use of Readly as I can't read outdoors like I do on my Paperwhite.
So, should I ditch the two and switch to Kindle Unlimited instead?