It states in the description that back issues and future issues are purchased through the app. That you can also subscribe to the newsstand/digital version of the magazine with the prices listed.
Those that have written bad reviews, inferring they have in some way been conned because the magazine isn't free, are incorrect. The description, if people bother to take the time to read it properly and not just d/l because the app says it's free, will realise quickly this app isn't misleading or dishonest in the slightest. The app is free, the magazine, like most other magazines, is not. As a subscriber to the physical magazine I would be disappointed if people got this app with the ability to read the magazine for free.
Would like it if there was a way to input my subscription account details into the app instead of having to cancel my current subscription and re-subscribe here. I like getting the physical magazine and currently I can log online and read when away from home and have forgotten my magazine, so thought I could just input my details on the app. Unless I have missed something!