
It is unfortunate that the vast majority of mobile applications available from Apple`s store satisfy mostly the opposite of these criteria: they are unstable, undocumented or poorly so or in a foreign language, require the user to create a "cloud" or other type of account with the vendor, simply to work with desktop documents, often as a way of extracting additional passive income while undermining user`s privacy, proliferate paid updates and online purchases, and in many cases are designed as toys for children. GoodReader PDF Editor & Viewer currently costs 2.99 for the base app, but that is as part of a current 50 discount offer. The main reasons for this are stability, existence and adequacy of documentation, the absence of a requirement to create a superfluous online account with the vendor, infrequency of paid updates and online purchases, and most importantly, simple usefulness. Of the many hundreds if not thousands of iOS apps I have paid for, in terms of time, money, and typically both, that I actually use on a regular basis.
