Stop fighting AI.
Start thinking clearly.
Prompt Doctor diagnoses the thinking flaws behind weak prompts, rewrites them at a higher level, and coaches you to reason like a strategist — not a search-engine user.
Free forever for basic analysis. No card required.
A second brain for your prompts
Diagnose flaws
Find the missing context, vague verbs and untested assumptions in any prompt.
Rewrite at a higher level
Get a tightened, structured prompt with clear roles, constraints and success criteria.
Learn the thinking
Each analysis ends with a short lesson — so next time you write the better prompt yourself.
Explore the app
Everything Prompt Doctor offers — jump straight in or open the menu (top-left) anytime.
Analyze
Diagnose and rewrite any prompt in seconds.
Academy
Structured lessons to think and prompt better.
Marketplace
Buy and sell battle-tested prompts.
My Purchases
Access everything you've bought.
Promote
Boost your listings to reach more buyers.
Wallet
Track earnings and request payouts.
Notes
Capture insights with tags and search.
History
Revisit every past analysis.
Consultation
Book a 1:1 session.
Help
Book a 1:1 help session.
Pricing
Free, Pro and Premium plans.
FAQ
Answers to common questions.
Profile
Manage your account and settings.
How it works
Tap a step to jump to it.
Diagnosis
We scan your prompt for missing context, vague verbs, untested assumptions and structural gaps.
Why it failed
A clear breakdown of the thinking errors behind the prompt — so the fix isn't just cosmetic.
Rewrite
A tightened, structured rewrite with explicit roles, constraints and success criteria.
Coaching
A short lesson on the reasoning move you missed — so next time you write the better prompt yourself.
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Simple, transparent pricing
Start free. Upgrade when thinking better starts paying off.
Free
Get started
£0
- 10 basic diagnoses / day
- 10 prompt generations / day
- Low tier model — GPT-5-nano / Gemini Flash-Lite
- Save prompts & notes
Pro
For power users
£15£10.50/mo for 3 months
Then £15/month. Launch offer — 30% off auto-applied.
- Everything in Free
- 30 basic diagnoses / day
- 30 prompt generations / day with richer examples
- Mid tier — GPT-5-mini / Gemini 2.5 Flash
- Pro Academy — 4 modules, 10 lessons
- Notes system with tags
- Shareable analysis links
- Cancel anytime — no lock-in
Premium
For serious creators & consultants
£25£17.50/mo for 3 months
Then £25/month. Launch offer — 30% off auto-applied.
- Everything in Pro
- Unlimited daily diagnoses & prompt generations
- Expert-grade Generate — multi-shot examples, CoT, evaluation rubrics
- High tier — GPT-5 / Gemini 2.5 Pro priority routing
- Deep diagnosis — multi-pass with critique loop
- Custom AI personas & saved brand voices
- Voice transcription in 50+ languages
- Image → prompt extraction (OCR + vision)
- Premium Academy — 6 extra modules, 16 lessons
- Marketplace: 50% lower selling fees
- Priority email support (24h SLA)
Learn to prompt like a pro
10 modules · 28 lessons. Self-paced, opinionated, built from what actually works in production. Browse the full curriculum below — sign in with Pro to start learning.
1 · Foundations of Prompting
Build the mental model behind every great prompt.
- 8 minHow LLMs actually read your promptTokens, attention and why word order matters more than you think.
- 6 minSpecificity beats clevernessWhy concrete nouns, numbers and examples outperform 'be creative'.
2 · Core Techniques
The patterns pros reach for again and again.
- 10 minFew-shot promptingTeach the model your style with 2–5 worked examples.
- 9 minChain-of-thought & step-by-stepForce the model to think before it speaks.
- 7 minRole and persona promptingGive the model a job title and a point of view.
3 · Advanced Workflows
Multi-step prompting, evals and production-grade patterns.
- 12 minPrompt chainingBreak one impossible prompt into three easy ones.
- 8 minSelf-critique and rewritingMake the model grade and improve its own output.
- 11 minEvaluating your promptsStop guessing. Build a tiny eval set and measure.
4 · Shipping to Production
Reliability, cost and safety for prompts that real users hit.
- 9 minGuardrails and refusalsStop the model going off-script under adversarial input.
- 7 minCost and latency tuningSmaller models, shorter prompts, cached preambles.
5 · Premium · Production AI Systems
Architect multi-agent, multi-model pipelines that ship.
- 18 minMulti-agent orchestrationPlanner, executor, critic — three agents that beat one.
- 14 minCost-aware model routingRoute each request to the cheapest model that can do the job.
- 16 minRAG that actually worksWhy most RAG demos break in production and how to fix them.
- 12 minStructured output at scaleJSON schema, tool calls, surviving the model's bad days.
6 · Premium · Prompting as a Business
Turn your prompting skill into a deliverable, product, or contract.
- 15 minPackaging prompts as productsFrom a clever prompt to something a stranger will pay for.
- 20 minSelling AI workflows to clientsScope, quote and deliver a prompt-engineering engagement.
- 13 minBuilding evaluation suites for clientsThe artefact that makes you irreplaceable.
7 · Premium · Persona Engineering
Design custom AI personas that sound unmistakably like a brand or a person.
- 14 minCapturing a voice fingerprintReduce a voice to 12 measurable style traits.
- 11 minStacking personas for nuanceCombine role × mood × constraint to escape generic output.
- 9 minSafe impersonation & legal linesWhere 'in the style of' ends and trademark trouble begins.
8 · Premium · Multimodal & Voice Pipelines
Prompts that read images, watch screens and talk back.
- 13 minImage → prompt extractionTurn a screenshot, sketch or photo into a structured prompt.
- 12 minVoice-first prompt flowsPrompts designed for spoken input — no markdown, no lists.
9 · Premium · Safety, Privacy & Compliance
Ship prompts that survive lawyers, auditors and adversarial users.
- 11 minPII redaction at the prompt boundaryStrip personal data before it ever reaches the model.
- 14 minAdversarial prompt testingRed-team your own prompts before users do.
- 10 minAudit trails & explainabilityProve what the model said, why, and from what source.
10 · Premium · Automation & Integrations
Wire prompts into the tools that actually run your business.
- 12 minWebhook-triggered promptsTurn any event into a prompt run.
- 10 minScheduled batch promptingRun thousands of prompts overnight — cheaply and reliably.
- 15 minTool use & function callingLet the model call your APIs — safely.
Compare Plans
See exactly what's included at each tier. Upgrade anytime — cancel anytime.
Basic diagnoses
Free
Pro
Premium
Prompt generations
Free
Pro
Premium
Deep diagnosis (multi-pass)
Free
Pro
Premium
AI model tier
Free
Pro
Premium
Prompt Academy
Free
Pro
Premium
System prompts builder
Free
Pro
Premium
Notes with tags
Free
Pro
Premium
Shareable analysis links
Free
Pro
Premium
Voice transcription (50+ langs)
Free
Pro
Premium
Image → prompt (OCR + vision)
Free
Pro
Premium
Custom AI personas & brand voices
Free
Pro
Premium
Marketplace selling fees
Free
Pro
Premium
Priority support
Free
Pro
Premium
What you can do here: Buy AI prompts for ChatGPT, Midjourney, Claude & Gemini • Sell your own prompts and keep the majority of each sale • Only sellers need a subscription to list • Payments are processed securely by Stripe • A growing community marketplace for prompts across business, writing, design & learning.