The InfoRapid KnowledgeBase Builder is an excellent tool for Knowledge Management. You can save text documents and web pages with all formattings and links in your knowledge base and perform a full text search in it. Since every document is attached as a text note to a mindmap item, you can organize them perfectly in a large mindmap.
The app is totally safe to download. InfoRapid is the developer of KnowledgeBase Builder that can be found in the Productivity category. According to the latest info, the tool is rated 4.5 on Google Play and can be legally used by people aged 10 and older.
The most recent update was on Oct 10, 2020 and this application was downloaded and installed by over 1K users. Download the setup package of KnowledgeBase Builder 7.7.2 that is free of charge and have a look at users' reviews on Droid Informer. The app is built for Android 4.4 and higher.