Just seen this as I use To PDF; great pity! From their facebook page: 'We are sorry to announce that the DAR Software account will be closed soon. All DAR Software apps will be deleted from the Apple App Store but remain working on your devices. The updates and support for those apps will be stopped, but the VPN subscriptions that you have purchased will work the same way, because they are part of another service. You will not be able to extend the existing VPN subscription from any DAR Software app, because it will require an in-app purchase. However, your KeepSolid ID, that you have created for the VPN service, works in any KeepSolid app. Your existing VPN subscription covers the VPN access from VPN Unlimited apps and can be extended from any VPN Unlimited app via in-app purchase or from the official VPN Unlimited website https://vpnunlimitedapp.com. VPN Unlimited apps are available for iOS, Android, Mac OS X and MS Windows devices. You can download the required client app from the official VPN Unlimited website. We are sorry for any incovenience and hope that you will enjoy our apps for the rest of their existence. Thanks for being with us! DAR Software Team'