PDF Search worked great for about a week then stopped working. I contacted support via email, never heard back from them. Removed and reinstalled the app and it works again but now it prompts to pay a second time. Does not recognize the Restore Previous Purchase function I have asked Apple for a refund.UPDATE: I figured out what happened. I had activated the app using the license key from your email. The next time the App Store prompted me to install updates I did and a different (newer?) version of PDF Search installed. That is when it stopped being recognized as PRO. I have removed everything, reinstalled from the link in my purchase email, and reactivated. Everything is working now. This is confusing and, I assume, I should never let the App Store update PDF Search and only do that from Check Updates within the app. Thanks for getting back to me.

Having used PDFSearch for several months now, I am significantly empowered by it's ability to quickly locate content that I have read as well have not yet read. Given about 30,000 documents of which 7,500 or so are books, I can quickly locate research topics in books wherein I would never find this information manually, thus extending my research capabilites simply due to this profound access and retrieval app. Choose a keyword and every book or document you have wil be presented to you in a beuatiful graphical format with the referenced page visible in the adjacent window. Further, the developer, Muharrem, is very thoughtful and helpful and provides personal support when needed. I highly recommend this app to anyone who is a student, a reporter, a researcher or writer, a teacher of professor that needs to pull information together quickly to present a lecture for example, or someone with a great deal of information they have carefully saved on their computer over the years. Apple Spotlight pales in comparison.

I very much appreciate PDF Search (currently using Version 1.7). I have thousands of PDFs on my computer, with quite a few folders holding the bulk of them. Years ago I gave up on the idea of tags; I saved PDFs faster than I could decide on what tags to use! Instead I depend on searches. What makes PDF Search so handy is its display of the documents located and their ranking, the display showing the first page of each document and, when selected, the document itself with search terms highlighted. Quite often that first page display alone jogs my memory of the circumstances that led me to collect it in the first place. The indexing process itself takes some time for folders with hundreds of PDFs of course, but that’s hardly a problem because it’s happening in the background. This is a good tool to have on hand.

The search functions are the best I've found, especially if you have large collections. I'm using this with about 2300 documents (~20GB) of PDFs. Props to the developer! Streamling the search of such large collections is an incredible achievement. The integration with an AI chat (Google's Gemeni) is decent as well. Some feedback:- Needs a unique name, it's difficult to search for this app with such a generic name "PDF Search"- Needs more features for organizing material once you find things. Bookmarks and tags are only marginally useful.- Searching a single PDF is difficult to do. Having a "Search selected" would be extremely helpful. - Using AI chat with selected documents would be great as well.- Saving a search result would be very useful.- Support for multiple windows/instances of the app would also be very useful.Build out the feature set a bit, and you'll be swimming in money from people doing research.