iTheory Hazard Perception Test is an iPhone application developed by DJG CORE HOLDINGS LIMITED that offers a full version of the UK government's Driver and Vehicle Standards Agency (DVSA) 20 revision clips for the 2022 Hazard Perception Test. With over a million learners already using it, this app provides essential training for learners, trainers, ADIs, and PDIs.

The app allows you to practice across a wide range of road conditions and receive immediate feedback after each clip to find out how well you have scored. You can also review each clip to determine where the hazard started and where maximum points could have been achieved. Additionally, the app provides a progress monitor to keep track of your performance.

The app contains licensed content from the UK government's DVSA and is up to date for the 2022 Hazard Perception Test. Although there are ads, they allow the app to be offered for free. If you prefer no ads, you can simply upgrade.

Overall, this app is a must-have for those preparing for their UK driving test as it provides valuable practice and feedback.