Instrument Test Prep is a free educational app developed by Aeroapps Technology LLC for iPhone users. It offers over 900 FAA questions and explanations to help individuals prepare for the FAA Instrument Rating Knowledge Test.

With Instrument Test Prep, users have the option to upgrade to the complete ground school course, which unlocks additional lessons, questions, statistics, and more. The app allows users to create custom study sessions based on topics, session size, and overall mastery. Filters are available to include or exclude questions that require the use of figures or an E6B.

One of the standout features of Instrument Test Prep is the ability to create practice sessions from missed questions after completing a practice or exam session. This allows users to focus on areas where they need improvement. Additionally, users can review missed questions after a practice or exam session to further enhance their understanding.

The app also offers simulated FAA exams that are administered under the same rules and time constraints as the actual Instrument Rating exam. Unlike other test prep apps, Instrument Test Prep ensures the correct proportion of questions from each knowledge area per the ACS.

Furthermore, Instrument Test Prep allows users to sync their data and course progress across all their iOS devices, providing a seamless learning experience. The app also grants access to a library of study resources for the Instrument Rating - Airplane.

Overall, Instrument Test Prep is a comprehensive tool that covers all areas of the FAA Instrument Rating Airman Certification Standards, ensuring thorough preparation for the knowledge test. The detailed explanations and references provided for all questions, including the text of the regulation where applicable, further enhance the learning experience.