Updated July 2026 following the launch of GPnotebook AI Answers. The original version of this comparison described GPnotebook as an excellent reference platform without AI. That is no longer accurate, and this rewrite gives GPnotebook full credit for the change: it now offers structured, natural-language AI Answers built primarily on its clinician-authored library. The comparison that follows is therefore between two serious clinical AI architectures, not between AI and its absence.
Two origins, two architectures
GPnotebook is a long-established clinical reference archive, begun in the early 1990s by UK medical students at Oxford and grown into more than 35,000 concise, GP-authored, interlinked articles, with AI added in 2026 as a new interface over that asset. iatroX is an AI-first UK clinical knowledge and learning platform, founded by a practising UK doctor and built from inception around natural-language questions, source-grounded retrieval and integrated learning workflows. Neither origin is superior in itself, but each shapes what its product finds easy and hard.
What each product now is
GPnotebook offers deterministic search across its archive plus AI Answers: type a clinical question, receive a structured response drawn primarily from the GPnotebook library, supplemented where needed by authoritative sources such as NICE, with links to the supporting articles and a note on what the answer relied on. Free accounts include 10 AI Answers per month; Pro (£7.99 monthly or £71.88 annually) includes 1,000, plus automatic CPD logging of each answer read at 0.05 credits, activity tracking across pages, videos, podcasts and quizzes, reflective notes, PDF appraisal export, FourteenFish sync, Pro video modules and study groups.
iatroX offers Ask iatroX, a clinical AI that retrieves directly from UK national guidance and medicines information, NICE, CKS, SmPC/eMC, MHRA, SIGN and NHS content, and returns citation-led answers with follow-up questioning; 80+ UK clinical calculators; reflective CPD logging with appraisal-ready output; a Brainstorm reasoning mode; a Socratic Tutor; and curriculum-mapped Q-banks across UK and international postgraduate examinations, with the UK core exams free and specialist banks paid. The clinical decision-support tool is UKCA-marked and MHRA-registered as a Class I device.
The source strategies
This is the deepest difference. GPnotebook AI Answers synthesises its own GP-authored articles first, reaching for external sources such as NICE where needed; its provenance points into its archive. Ask iatroX retrieves from the national guidance layer itself; its provenance points at NICE, CKS or the SmPC directly. In practice the two products answer subtly different questions. GPnotebook answers: what do GPnotebook's curated pages say about this? iatroX answers: what do the relevant UK sources indicate for this clinical question? Both are useful; they are not the same thing, and for threshold-dependent decisions the distance between an answer and its canonical source is a real safety variable.
Feature comparison
| Capability | GPnotebook | iatroX |
|---|---|---|
| Structured AI answers | Yes (AI Answers) | Yes (Ask iatroX) |
| Source traceability | To GPnotebook articles, with NICE supplement noted | To national guidance and medicines sources directly |
| Follow-up questioning | Limited | Yes |
| Clinical calculators | No | 80+, UK-contextualised |
| CPD capture | Automatic per answer read (Pro) | Reflective, clinician-controlled |
| Appraisal export | PDF plus FourteenFish sync (Pro) | Appraisal-ready output |
| Socratic learning | No | Yes (Socratic Tutor) |
| Exam Q-banks | Monthly quizzes for CPD | 15+ exams, curriculum-mapped, adaptive |
| Advertising | Ad-funded with declared editorial independence | No pharmaceutical advertising |
Where GPnotebook is genuinely strong
The credit side is substantial. A mature, extensive primary-care archive whose concision is a feature, not a compromise. Very high familiarity: for many GPs it is the reflex tab. Existing podcasts, videos, quizzes, study groups and CPD infrastructure that make the AI feature immediately useful rather than a novelty. Automatic CPD capture that converts daily lookups into appraisal evidence with zero friction. And a bounded, curated retrieval surface, which is a defensible safety posture. For clinicians who already live inside GPnotebook, AI Answers makes a good product meaningfully better.
Where iatroX is genuinely strong
AI-native question handling with follow-ups, built for conversation rather than adapted to it. Direct UK source grounding, so verification lands on the canonical wording in one click. Broader reasoning and synthesis workflows through Brainstorm. Integration of the answer engine with calculators, Socratic tutoring and examination preparation, so clinical questions and learning share one platform. And a regulatory posture, UKCA marking and MHRA Class I registration for the decision-support tool, that matters to governance-minded organisations evaluating clinical AI.
The overlap, and where differentiation now lives
Both products now compete for the same routine UK point-of-care questions, and for that shared territory the differentiators are no longer AI versus no AI. They are source depth, answer quality, verification distance, workflow fit and the adjacent learning features. Reasonable clinicians will weigh those differently, which is why the honest recommendation is scenario-based rather than universal.
Scenario-based recommendations
If you are an established GP who reaches for GPnotebook instinctively and mainly wants faster access to its archive with CPD captured automatically, GPnotebook Pro with AI Answers is a strong, coherent choice. If you want answers anchored directly to NICE, CKS and the SmPC, with calculators and follow-up questioning in the same workflow, Ask iatroX fits better. If you are a trainee preparing for the MRCGP AKT or another UK postgraduate exam, iatroX serves clinical reference and revision from one engine, which GPnotebook's quizzes are not designed to do. If you are part of a multi-professional team including ANPs and pharmacists, iatroX's profession-agnostic design and free clinical layer travel well across the team. And if you want maximum coverage, run both: GPnotebook for curated explanation in familiar language, iatroX for source-grounded synthesis and learning, at a combined cost of £0 to £71.88 a year.
Verdict
There is no universal winner, and after this launch the comparison is more interesting, not less. GPnotebook has executed the publisher-grounded AI play well and deserves to be taken seriously as a clinical AI product, not just a beloved archive. iatroX remains differentiated where it always intended to be: jurisdictional source grounding, regulatory positioning, calculators, Socratic learning and examination preparation around the same answer engine. Choose by scenario, verify high-stakes answers at source whichever tool you use, and enjoy the fact that UK clinicians now have two credible architectures competing to answer their questions well.