Premium subscribers are granted 10 GB of new uploaded data every month, faster word recognition in images, heightened security, PDF annotation, Context, where notes and news articles can be seen, which are related to the open note and the ability to search text within PDF documents. They also receive additional options for notebook sharing. Each of free, Plus* and Premium account types allow notebook sharing with other Evernote users; however, the accounts are distinguished by editing capabilities. In regards to shared notebooks, editing permissions to non-paid account holders may only be granted to premium Evernote subscribers. The free service does not make files available offline on iOS and Android devices; while sometimes they are available from cache, editing these files can cause conflicts when synchronizing.