Wordbook · Terms and credits
Independent learning materials.
Wordbook for GMAT™ Test and Wordbook for GRE® Test are vocabulary study tools from G-Prep Inc. They are not official test preparation products. They do not contain official test questions or promise a particular exam score.
iOS and macOS purchases
This purchase section applies to the iOS and macOS editions. For the Android editions’ current testing and availability status, see the Android guide.
Each app is a separate paid download. App Store purchase terms and Apple’s standard app license apply unless the store listing specifies another applicable agreement. There is no advertising, subscription, or additional in-app purchase in version 1.0.
Vocabulary sources
Some definitions and examples are adapted from Open English WordNet 2025, provided by the Open English WordNet team under Creative Commons Attribution 4.0. It includes material from Princeton WordNet. Other definitions and examples, and the applied-practice exercises, are original Wordbook content. Entry-level credits and the app’s credits identify the source material.
Open English WordNet · Creative Commons Attribution 4.0
The app’s credits include the full source notices. English pronunciation uses the device’s speech services; voice recordings are not republished as Wordbook assets.
Trademarks
GMAT is a trademark of the Graduate Management Admission Council. GRE is a registered trademark of ETS. G-Prep and Wordbook are not affiliated with, endorsed by, or approved by either organization. References to the exams identify the learning context.