GPnotebook has been open on GP desktops since 2001. It is the instinctive "I'll just check GPnotebook" of a generation of primary care professionals. Over 30,000 concise, interlinked clinical reference articles. Written by practising GPs. Updated hundreds of times per month. It is the default for a reason.
iatroX is 15 months old. AI-powered. MHRA-registered. Built from scratch for a world where clinicians ask questions in natural language rather than searching through encyclopedic article hierarchies.
This is not a "one replaces the other" comparison. It is an analysis of how clinical reference is evolving — and what the implications are for your daily workflow.
GPnotebook: The 30,000-Page Encyclopedia
GPnotebook comprises over 30,000 concise, interlinked clinical reference articles, each covering a specific primary care topic. The articles are designed for speed — brief enough to scan during a 10-minute consultation, interlinked so you can navigate from one condition to related topics quickly.
GPnotebook Pro (£7.99/month or £71.88/year) adds: unlimited page access (free accounts hit a monthly limit), automatic CPD tracking (every page view logged as CPD activity), reflective notes capability, Pro video content (20+ clinical modules), Study Groups (interactive online small-group learning sessions using case studies), monthly MCQ quizzes (1 CPD credit per completion), and reading pattern analytics comparing your use with other GPnotebook users.
The podcast (188+ episodes) and GPnotebook TV provide additional learning channels. A jobs board lists GP vacancies.
The advertising model. GPnotebook is partially funded by pharmaceutical advertising — declared transparently at gpnotebook.com/en-GB/advertise. This is not inherently problematic, and the editorial content appears independent. But it is a different commercial model from platforms without pharmaceutical advertising.
What GPnotebook does well: Breadth. Speed. Familiarity. If you need to quickly check the differential diagnosis for raised alkaline phosphatase during a consultation, GPnotebook provides a concise answer in 15 seconds. The 30,000-page library covers nearly every clinical topic a GP might encounter. The Pro CPD tracking — turning daily reading into logged CPD — is genuinely valuable for revalidation.
What GPnotebook does not do: AI. In 2026, this is a significant architectural gap. GPnotebook requires you to know which article to find. If you search "raised ALP," you find the raised alkaline phosphatase article. But if you want to ask "What is the investigation pathway for a 55-year-old woman with raised ALP, normal LFTs, and bone pain?" — synthesising multiple pieces of information into a clinical recommendation — GPnotebook cannot do this. It is an encyclopedia, not a reasoning engine.
No exam preparation. No adaptive learning. No clinical calculators. No postgraduate exam coverage.
iatroX: The AI-Native Reference
iatroX approaches clinical reference from the opposite direction: start with the clinical question, not the article index.
Ask iatroX is a clinical AI that takes natural language questions — "What is the current NICE pathway for suspected PE in a pregnant woman?" — and returns a cited, guideline-grounded answer in seconds. It searches NICE, CKS, BNF, and SIGN guidelines and synthesises the relevant information into a direct clinical recommendation with citation links. You describe the clinical problem. The AI retrieves the guideline answer.
Knowledge Centre: Structured A-Z guideline access — a curated front door to NICE guidelines. Guidance Summaries: Condition-specific actionable summaries anchored to named guidelines. Calculators: 80+ UK-contextualised clinical tools (QRISK3, NEWS2, CHA₂DS₂-VASc, CKD-EPI) with NICE-referenced interpretation. Exam preparation: MRCGP AKT, MRCP, UKMLA, and 7 diploma Q-banks. CPD logging with FourteenFish sync.
Free. No subscription for clinical reference, calculators, or CPD. No pharmaceutical advertising. MHRA-registered as a Class I Medical Device.
The AI Gap
GPnotebook has zero AI features. In a landscape where clinical AI is being adopted across NHS primary care — AI scribes (Tortus, Heidi, Accurx Scribe), AI clinical decision support (iatroX), AI triage — the absence of AI in GPnotebook is increasingly conspicuous.
The practical difference is best illustrated through specific clinical scenarios that arise during a typical GP surgery.
Scenario 1: Unfamiliar drug interaction. A patient on warfarin has been prescribed clarithromycin by the out-of-hours service. You want to check the interaction before their next INR. On GPnotebook, you search "warfarin," find the warfarin article, scroll to the interactions section, and read through a list to find macrolide antibiotics. Time: approximately 60-90 seconds. On iatroX, you type "Does clarithromycin interact with warfarin?" and receive the BNF-cited answer — yes, increased INR risk, monitor closely, consider dose reduction — in approximately 10 seconds. The answer is specific to the question, not a general article you need to parse.
Scenario 2: Complex management question. A 62-year-old Black African man with type 2 diabetes, CKD stage 3b, and heart failure asks whether he should start a statin. On GPnotebook, you need to check multiple articles: the CKD article for statin considerations in renal disease, the diabetes article for cardiovascular risk, the heart failure article for drug interactions, and possibly the lipid management article for QRISK3 interpretation in the context of existing CVD risk factors. Four articles, synthesised in your head. On iatroX, you ask: "Should I start a statin in a 62-year-old Black African man with T2DM, CKD 3b, and heart failure?" Ask iatroX synthesises NICE CG181 (lipid management), NICE NG203 (CKD), and the BNF statin interactions into a single cited answer addressing all three comorbidities simultaneously. One question, one synthesised answer.
Scenario 3: "Has anything changed?" You have been managing a patient's asthma using the BTS/SIGN stepwise approach. A colleague mentions that NICE updated the asthma guideline recently. On GPnotebook, you search "asthma" and read the article — which may or may not yet reflect the most recent NICE update, depending on when the editorial team last reviewed it. On iatroX, you ask: "What is the current NICE stepped care for adult asthma?" and receive the answer referenced to the current guideline version.
Scenario 4: Rare condition you have never seen. A patient presents with symptoms suggestive of Addison's disease — a condition you last studied for your MRCGP AKT. On GPnotebook, the Addison's article provides a comprehensive, concise overview: symptoms, investigations, management. GPnotebook excels here — the 30,000-page library means even rare conditions have dedicated articles with structured clinical information. On iatroX, Ask iatroX answers specific questions ("What is the short Synacthen test protocol?" / "What is the NICE-recommended replacement regimen?"), but the UKMLA Academy page for Addison's provides a more structured learning overview for initial familiarisation. For genuinely rare conditions, GPnotebook's encyclopedic depth remains a genuine advantage.
The pattern: for common clinical scenarios where you need a specific answer quickly, iatroX's AI synthesis is faster and more precise. For rare conditions where you need a comprehensive overview, GPnotebook's encyclopedic library provides broader coverage.
GPnotebook Pro: Is It Worth £71.88/Year?
GPnotebook Pro's core proposition is converting your daily reading into verifiable CPD. Every page you view is logged. Every video you watch is tracked. You can add reflective notes and export a PDF CPD report for your annual appraisal. The monthly MCQ quiz earns 1 CPD credit per completion. Study Groups (interactive online case-based sessions) provide structured learning with peers.
The question is whether this CPD-tracking function alone justifies £71.88/year — particularly when iatroX offers free CPD logging through Q-bank performance tracking and clinical query logging.
GPnotebook Pro's CPD tracking captures passive learning — reading articles. iatroX's CPD tracking captures active learning — answering questions, checking guidelines, using clinical calculators. The evidence consistently shows that active learning produces better retention than passive reading. For revalidation purposes, both generate legitimate CPD evidence — but the iatroX evidence (demonstrable knowledge testing with measurable proficiency data) may be more compelling in a reflective account than "I read the hyponatraemia article on GPnotebook."
The Pro video content (20+ modules) and Study Groups add genuine value — these are interactive learning resources, not just reference material. If you use GPnotebook daily and value the video content and Study Groups, Pro at £71.88/year is reasonable value. If you primarily use GPnotebook for quick reference lookups, the free tier (with its page limit) may be sufficient — supplemented by iatroX (free, unlimited) for the lookups that exceed the limit.
For ANPs and Practice Pharmacists
GPnotebook is explicitly designed for GPs. The articles are written from a GP perspective, the clinical pathways assume GP scope of practice, and the community (Study Groups, peer analytics) is predominantly GP-focused. ANPs and pharmacists can use it — the clinical content is relevant — but the platform does not explicitly acknowledge or cater to non-doctor primary care clinicians.
iatroX serves all primary care clinicians equally. Ask iatroX answers clinical questions without profession-specific assumptions — the same guideline answer is returned regardless of whether a GP, ANP, or pharmacist is asking. The calculators are profession-agnostic. The exam Q-banks include MRCGP AKT (for GPs), the GPhC Q-bank (for pharmacists), and clinical content relevant to ANP practice. For multi-professional primary care teams — which is the reality of PCN-based care in 2026 — a reference tool that serves the whole team is more efficient than one designed exclusively for GPs.
The Content Currency Question
GPnotebook's 30,000 articles are maintained by an editorial team — articles are updated when guidelines change, with hundreds of updates per month. This is a significant ongoing editorial investment, and the result is a generally current reference library.
However, the update model is reactive: the editorial team reviews and updates articles after guidelines change. There is inevitably a lag between a NICE guideline update and the corresponding GPnotebook article revision — days, weeks, or occasionally longer for less-trafficked articles.
iatroX's Ask iatroX accesses the current guideline text through its RAG (Retrieval Augmented Generation) architecture — meaning it references the guidelines as they exist now, not as an editorial team last interpreted them. This is a structural difference: GPnotebook's content currency depends on editorial review cadence. iatroX's content currency depends on guideline publication cadence.
For most clinical questions, this difference is immaterial — guidelines do not change frequently enough for a few days' lag to matter. For the specific week after a major NICE update (such as the 2026 diabetes or CHF guidelines), iatroX's real-time access may provide the current recommendation before GPnotebook's article has been updated.
The Workflow Comparison: A Typical Morning Surgery
Consider a morning surgery with 20 patients. During those 20 consultations, you might need to reference clinical information 5-8 times — a drug interaction check, a dose verification, a management pathway confirmation, a referral threshold, a clinical score calculation.
GPnotebook workflow: Open GPnotebook in a browser tab. Search for the condition or drug. Find the relevant article. Scan for the specific information you need. Close or minimise the tab. Repeat for each query. Each lookup takes 30-90 seconds depending on how quickly you find the right article and locate the specific answer within it. If using Pro, each page view is automatically logged as CPD.
iatroX workflow: Open Ask iatroX (bookmarked or app). Type your question in natural language. Receive the cited answer. If a clinical score is needed, open iatroX Calculators (same platform) and enter the values. Each lookup takes 10-30 seconds. The clinical question and the calculator result are both logged for CPD.
The cumulative difference: Over 20 consultations with 6 reference queries, the time difference is approximately 2-5 minutes per surgery. This sounds marginal — but over 10 surgeries per week, it accumulates to 20-50 minutes. Over a year, it is 15-40 hours of clinician time. More importantly, the reduced friction means you are more likely to actually check when uncertain rather than relying on memory — which is the behaviour that clinical reference tools are supposed to enable.
The calculators are an additional efficiency layer that GPnotebook does not offer. When you need a QRISK3 score, a CHA₂DS₂-VASc, or a CKD-EPI eGFR during a consultation, you currently either use MDCalc (US-contextualised), an NHS calculator, or a separate app. On iatroX, the calculator sits within the same platform as your clinical reference — one tab, one login, one workflow.
The Advertising Question
GPnotebook is partially funded by pharmaceutical advertising. This is disclosed transparently, and the editorial content appears independent of advertising relationships. Many trusted medical resources use advertising models (BMJ, Pulse, MIMS).
iatroX has no pharmaceutical advertising. For clinical governance purposes — particularly in PCNs and ICS organisations implementing formal clinical reference policies — an MHRA-registered, ad-free tool may be preferred. For shared decision-making consultations where a patient might see your screen, an ad-free interface removes any perception of commercial influence.
This is not a quality judgment — it is a governance consideration that matters to some organisations and not to others.
Who Should Use Which
Established GPs who have used GPnotebook for 20 years → GPnotebook remains excellent for rapid lookup of conditions you already know exist. The muscle memory is real — you know the article structure, you know where to find the information, and the 30,000-page library covers rare conditions that newer platforms may not yet address. Pro CPD tracking is valuable if you use GPnotebook daily.
GPs who want AI-assisted clinical reasoning → Ask iatroX. The ability to describe a clinical problem in natural language and receive a synthesised, guideline-cited answer is a fundamentally different (and for complex queries, faster) interaction model.
ANPs and pharmacists → iatroX. The platform serves all primary care clinicians equally, without the GP-specific assumptions that GPnotebook's design reflects.
GP trainees preparing for the MRCGP → iatroX. The free AKT Q-bank, clinical AI reference, and calculators serve both daily clinical reference and exam preparation simultaneously. GPnotebook does not offer exam preparation.
Both can coexist — and for many GPs, they should. GPnotebook for encyclopedic depth on uncommon conditions and the familiar interface you have used for years. iatroX for AI-powered daily reference, clinical calculators, exam prep, and CPD. Total cost: GPnotebook free tier (with page limits) + iatroX (free) = £0. Or GPnotebook Pro (£71.88/year) + iatroX (free) = £71.88/year.
Verdict
GPnotebook is a genuinely excellent clinical reference that has served UK general practice for over two decades. Its 30,000-page library, editorial quality, and Pro CPD features remain valuable — particularly for rare conditions and clinicians who prefer an encyclopedic lookup model.
iatroX represents the next generation of clinical reference — AI-powered, guideline-grounded, MHRA-registered, ad-free, and free. For the daily clinical queries that constitute 90 percent of reference use, it is faster, more precise, and more versatile than any encyclopedia-based model.
The smartest approach is both: GPnotebook for depth, iatroX for speed, intelligence, and everything GPnotebook does not offer (calculators, exam prep, clinical AI, CPD logging). The combined cost is £0 to £71.88/year — and the coverage is comprehensive.
For practices and PCNs standardising their clinical reference toolkit: GPnotebook Pro for clinicians who value the encyclopedic library and CPD tracking. iatroX (free) for every member of the clinical team — GPs, ANPs, pharmacists, PAs — as the AI-powered daily reference, calculator suite, and CPD evidence generator. Two tools, complementary architectures, total cost under £72/year per clinician. The clinical reference landscape has evolved — and the strongest practices use both legacy depth and AI intelligence.