# ACS - Gas Safety Exam CCN1 — Domestic Gas Exams > Domestic gas safety exam preparation app with practice questions. (iPhone/iPad app by Adnan Sheikh.) - Source: https://appshunter.io/ios/app/acs-gas-safety-exam-ccn1/id1642920032 (this page in markdown: same URL + `.md`) - Developer: [Adnan Sheikh](https://appshunter.io/developer/478871268) - Category: Education, Reference - Price: $16.99 - Age rating: 4+ - Requires: iOS 12.0 · 34 MB - Languages: English - Released: 2022-09-01 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/acs-gas-safety-exam-ccn1/id1642920032/reviews.md ## What is ACS? ACS Core Domestics Gas Safety CCN1 Exam Prep App will help beginners and re-assessment gas installers that need to keep their ACS qualifications up to date with the latest exam questions to test and practice from 2022 question Pool. -The App contains hundreds of multiple choice questions similar to what you will find in the real world ACS exams. -Practice as many times as required with no internet connection required after initial install. -Works on both iPhone and iPad, install on both devices at no extra cost. ACS certificate is required to join the ‘Gas Safe Register’ The Core Domestic Gas Safety (CCN1) app includes CPA1 (Combustion Performance Analysis) The Exam content covers -Gas safety, legislation and standards -Gas Rates -Tightness testing and purging -Installation of pipework and fittings (pipework within meter -installation and outlet pipework) -Gas emergency -Gas Characteristics -Products and characteristics of combustion -Ventilation -Fluing Standards -Gas Controls -CPA1 -Re-establish existing gas supply and re-light appliances -Gas control Rig questions This product is not affiliated with nor endorsed by the ACS board. ## Key features - Hundreds of multiple-choice questions - Practice offline - Covers gas safety, legislation, and standards - Includes CPA1 - Supports iPhone and iPad - Re-assessment practice ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/acs-gas-safety-exam-ccn1/id1642920032/reviews.md ### 1/5 — ? *2025-09-25, version 1.2* How do I get a refund ### 1/5 — Igor *2023-06-27, version 1.2* This app is absolutely identical as other ACS gas cnn1 app that cost £10. This is rip off ## Frequently asked questions about ACS ### What is ACS Gas Safety Exam CCN1? 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 question bank to practice from. ### What topics does ACS Gas Safety Exam CCN1 cover? The app covers a wide range of essential topics including gas safety legislation, gas rates, tightness testing, pipework installation, gas emergencies, combustion analysis (CPA1), and ventilation standards. ### Can I use ACS Gas Safety Exam CCN1 offline? Yes, after the initial installation, the app can be used without an internet connection. This allows for flexible study sessions anytime, anywhere. ### Is ACS Gas Safety Exam CCN1 suitable for re-assessment? Absolutely. The app is designed for both beginners and those needing to keep their ACS qualifications up-to-date through re-assessment, using the latest exam question pools. ### What devices support ACS Gas Safety Exam CCN1? ACS Gas Safety Exam CCN1 is compatible with both iPhone and iPad devices. Purchasing the app allows installation on both at no additional cost. ### How much does ACS Gas Safety Exam CCN1 cost? The application is available for a one-time purchase price of $16.99. This grants you access to all its features and content. ### Does ACS Gas Safety Exam CCN1 have ads? No, ACS Gas Safety Exam CCN1 is ad-free. You can study without interruptions from advertisements. ### When was ACS Gas Safety Exam CCN1 last updated? The app was last updated on October 16, 2022, with version 1.2. This ensures you are practicing with relatively current information. ## Version history (last 2 releases) ### 1.2 — 2022-10-16 -Question Pool Updated ### 1.0 — 2022-09-01 No release notes. ## More apps by Adnan Sheikh - [Maths Wiz Free](https://appshunter.io/ios/app/maths-wiz-free/id503733665) - [MRCP Question for MCQ's](https://appshunter.io/ios/app/mrcp-question-for-mcqs/id1205199875) - [Life in the UK Complete 2024](https://appshunter.io/ios/app/life-in-the-uk-complete-2024/id1210030971) - [EASA Pilot Exam Prep (LAPL)](https://appshunter.io/ios/app/easa-pilot-exam-prep-lapl/id1210195723) - [AMT: Aircraft Maintenance Exam](https://appshunter.io/ios/app/amt-aircraft-maintenance-exam/id1212070016) - [US citizenship 2017 - All The Questions](https://appshunter.io/ios/app/us-citizenship-2017-all-the-questions/id1214711161) All apps by Adnan Sheikh: https://appshunter.io/developer/478871268 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*