Poor app
Constantly crashes, poorly worded questions, and some answers marked as wrong are definitely correct.
Is not matching
In the picture says 385 but in the reality only 310 plus is missing when you answer running doesn’t give the reason

Prepare for your ACS Core Domestic Gas Safety CCN1 certification with this comprehensive mock exam app. It offers hundreds of multiple-choice questions covering all essential topics, allowing for unlimited practice offline on your iPhone or iPad.
1.6
June 12, 2025
- Questions updated, some removed as not tested any longer
ACS Gas Safety Exam CCN1 is a mobile application designed to help gas installers prepare for their Core Domestic Gas Safety CCN1 certification exams. It provides a large bank of multiple-choice questions similar to those found in real-world ACS exams.
No, after the initial installation, ACS Gas Safety Exam CCN1 can be used for practice as many times as required without an internet connection, making it convenient for offline study.
The app covers a wide range of essential topics including gas safety, legislation, pipework installation, gas emergency procedures, combustion analysis (CPA1), and re-establishing gas supplies. It aims to thoroughly prepare users for the certification.
Yes, the app is designed to work on both iPhone and iPad, and you can install it on both devices at no extra cost, offering flexibility in your study environment.
ACS Gas Safety Exam CCN1 is a paid application, available for a one-time purchase price of $19.99. This grants you access to all its features and content.
The latest version of ACS Gas Safety Exam CCN1 is 1.6, and it was last updated on June 12, 2025. This indicates ongoing development and potential for future content or feature updates.
ACS Gas Safety Exam CCN1 has an age rating of 4+, making it suitable for a broad audience. The content is educational and focused on professional certification.
No, ACS Gas Safety Exam CCN1 does not contain advertisements. The app is ad-free, allowing users to focus on their exam preparation without interruptions.