Reviews & feedback
We do not publish star ratings or testimonials for this app. Here is why, and what we suggest you judge it on instead.
No ratings, on purpose
2391 Inspection & Testing Pro was rebuilt for the City & Guilds 2391-52. It has not yet accumulated ratings or written reviews of its own for that release.
The App Store and Google Play listings it ships on carry some older ratings left over from different, unrelated apps that previously occupied them. Those ratings say nothing whatsoever about a 2391 revision tool, so we do not display them here, quote them in our marketing, or put them into structured data for search engines to pick up.
We would rather show you nothing than show you a number that means nothing. When this app earns ratings of its own, they will appear on this page — and only then.
Judge it on this instead
Four things you can check yourself, right now, without paying or signing up.
54 questions, free, before you pay
Every syllabus area on this site has free questions taken from the same bank as the app, with the same worked explanations. If the questions are not the standard you need, you will know within ten minutes and it will not have cost you anything.
The tools work here too
All 4 calculators, all 15 quick reference cards and the 12-scenario fault coding trainer run in your browser at no cost. They are the same engines and the same data as the app.
The numbers are the real numbers
556 questions across 7 syllabus areas is what the app actually contains — every count on this site is generated from the app's own question bank, not written by hand.
Sources are named
Content is written against BS 7671:2018+A4:2026 and HSE Guidance Note GS38. Reference cards carry the regulation they come from, and where a figure has not been verified we say so instead of guessing.
Tell us what is wrong with it
The most useful thing you can send us is a correction. If a question is wrong, an explanation is unclear, or a regulation reference has moved in a newer amendment, we want to know — tell us which question or page, and what you believe the correct answer is.
We fix confirmed corrections in both the app and this site, and we will tell you when it is done.
Already using it?
If it helped you pass, a rating on the App Store or Google Play is the single most useful thing you can do for us.
