⚕️
Prescriba
Your health companion
Trusted health intelligence

Health that
understands you

AI GP consultations, 30+ interactive health tools, and trusted medical information — all in one beautifully designed app.

30+
Health tools
200+
Conditions
24/7
AI GP
0
Data stored
The heart beats 100,000 times per day
Your gut contains over 100 trillion bacteria
The brain uses 20% of the body's total oxygen
Normal blood pressure: below 120/80 mmHg
150 minutes of exercise per week reduces heart disease risk by 35%
Humans shed 30,000 skin cells every hour
The average adult has 5 litres of blood
Sleep deprivation doubles the risk of obesity
The heart beats 100,000 times per day
Your gut contains over 100 trillion bacteria
The brain uses 20% of the body's total oxygen
Normal blood pressure: below 120/80 mmHg
150 minutes of exercise per week reduces heart disease risk by 35%
Humans shed 30,000 skin cells every hour
The average adult has 5 litres of blood
Sleep deprivation doubles the risk of obesity
Capabilities

Everything health,
beautifully unified

🩺

AI GP Consultation

Talk to Dr. Prescriba. It asks questions, builds a clinical picture, then gives you a real assessment — exactly like sitting with a doctor.

30+

Health tools

BMI, calories, body fat, period tracking, blood sugar, alcohol units and more.

📚

Learn & Explore

Browse 200+ conditions and medicines with links to NHS, Mayo Clinic and NICE for deep reading.

🚨

Emergency Alerts

40+ red-flag symptoms detected instantly. Immediate 999 guidance before anything else.

🔒

Completely Private

Nothing is stored, logged or shared. Your conversations vanish when you close the tab — by design.

Zero data storage No accounts No ads SSL encrypted
Health Tools

Pick a tool, get answers

⚖️
BMI Calculator
With body diagram
🔥
Calorie Needs
Daily TDEE
📊
Body Fat %
Navy method
🌸
Period Tracker
Cycle + fertility
🩸
Blood Sugar Log
HbA1c converter
🍷
Alcohol Units
Weekly tracker
🚬
Smoking Cost
Savings calculator
👁️
Eye Strain Timer
20-20-20 rule
Prescriba
Common topics

⚠️ Not a doctor. Emergency: 999

⚕️

How can I help you today?

Tell me what's going on. I'll ask you questions to understand your situation properly — just like a real GP consultation.

🔒 Not stored · Call 999 for emergencies

Body
Women's Health
Diabetes & Food
Lifestyle
Men's Health

⚖️ BMI Calculator

Body Mass Index with interactive visual. Adjust your height and weight to see your BMI category in real time.

Height170 cm
Weight70 kg
24.2
BMI Score
Normal weight
UNDER
NORMAL
18.5–24.9
OVER
25–29.9
OBESE
≥30
BMI is a screening tool, not a diagnostic. It doesn't account for muscle mass, bone density, or fat distribution. Always discuss results with a healthcare professional.

Body shape indicator

Normal

🔥 Daily Calorie Needs

Calculate your Total Daily Energy Expenditure (TDEE) based on your stats and activity level.

Age30 yrs
Height170 cm
Weight70 kg
Activity level
2,350
Calories/day to maintain weight
1,850
Weight loss
2,350
Maintain
2,850
Weight gain

📊 Body Fat % Estimator

Uses the US Navy circumference method. Measure waist, neck (and hip for women) in centimetres.

Height170 cm
Waist circumference80 cm
Neck circumference38 cm
18%
Estimated body fat percentage
Fitness
Men's ranges
Essential
2–5%
Athletic
6–13%
Fitness
14–17%
Average
18–24%
Obese
25%+

📉 Weight Loss Planner

See how long it will take to reach your goal weight safely.

Current weight80 kg
Goal weight70 kg
Weekly deficit500 kcal/day
20 weeks
Estimated time to goal
Safe weight loss is 0.5–1 kg per week (500–1000 kcal/day deficit). Losing faster than 1 kg/week risks muscle loss and nutritional deficiencies.

🌸 Period & Cycle Tracker

Track your menstrual cycle, fertile window, and predicted ovulation day.

Cycle length28 days
Period duration5 days
This tracker is for information only. Cycle lengths vary and this is not a contraceptive method.

🥚 Ovulation Calculator

Find your most fertile days based on your last period.

Average cycle length28 days

🤰 Pregnancy Calculator

Due date calculator and week-by-week milestones.

💜 PCOS Symptom Checklist

Check symptoms associated with Polycystic Ovary Syndrome. This is not a diagnosis — always see a GP.

Irregular or missing periods
Difficulty getting pregnant
Excess hair on face, chest, or back (hirsutism)
Weight gain, especially around the abdomen
Thinning hair or hair loss on scalp
Oily skin or acne
Dark patches of skin (acanthosis nigricans)
Persistent fatigue and low energy
Mood swings, anxiety, or depression
Bloating or pelvic pain

🌡️ Menopause Symptom Tracker

Rate the severity of your menopause symptoms to track changes over time.

Rate each symptom (0 = none, 10 = severe)
These scores can help you track symptoms to discuss with your GP. HRT is highly effective — ask your doctor about options.

🩸 Blood Sugar Log

Track your readings and see how they compare to target ranges.

NHS target ranges
Fasting / before meals4.0–7.0 mmol/L
2 hours after mealsUnder 8.5 mmol/L
Bedtime6.0–8.0 mmol/L

🧪 HbA1c Converter

Convert between mmol/mol (UK) and % (US) — and see what your level means.

HbA1c (mmol/mol)48
6.5%
HbA1c percentage
Diabetic range
Interpretation
NormalBelow 42 mmol/mol (6.0%)
Prediabetes42–47 mmol/mol (6.0–6.4%)
Diabetes48+ mmol/mol (6.5%+)

🍞 Carb Counter

Estimate carbohydrate grams in common foods and meals.

0g
Total carbohydrates

🍬 Sugar Intake Calculator

Track your daily free sugar intake against NHS recommendations (30g/day for adults).

0g
Free sugars today
Within limit
Limit: 30g/day

🚬 Smoking Cost Calculator

See how much smoking costs — and what you could do with that money.

Cigarettes per day10
Pack price (£)£14.00
£98
Per week
£420
Per month
£5,110
Per year
£51,100
Over 10 years
The NHS Stop Smoking Service increases your chance of quitting by up to 4x. Call 0300 123 1044 for free support.

🍷 Alcohol Unit Calculator

Track your weekly units. NHS recommends no more than 14 units per week.

0
Units this session
Within limits
Weekly limit: 14 units

☕ Caffeine Intake Checker

Track your daily caffeine. Safe limit is 400mg/day for adults (200mg if pregnant).

0mg
Caffeine today
Well within limit
Daily limit: 400mg

👁️ Eye Strain Timer

The 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds.

👁️
20:00
Timer ready — start working
💡 20-20-20 rule: Every 20 minutes of screen time, focus on something 20 feet (6 metres) away for 20 seconds. This relaxes your eye muscles and significantly reduces digital eye strain.

✅ Daily Habit Tracker

Track your healthy daily habits. Tap to mark complete.

💧 Drink 8 glasses of water
🚶 Walk 10,000 steps
🥗 Eat 5 portions of fruit and vegetables
😴 Sleep 7-9 hours
🧘 10 minutes mindfulness or meditation
💊 Take prescribed medications
🚭 No cigarettes today
📵 1 hour screen-free before bed
🏃 30 minutes exercise
📚 Read something educational

☀️ Sun Exposure & SPF Guide

Find out how long you can safely be in the sun based on your skin type and SPF used.

Your skin type
Type I — Always burns, never tans. Very fair, freckles (10 min burn time)
Type II — Usually burns, tans minimally. Fair (15 min)
Type III — Sometimes burns, tans gradually. Light brown (20 min)
Type IV — Rarely burns, tans well. Olive/moderate brown (30 min)
Type V — Very rarely burns. Dark brown (45 min)
Type VI — Never burns. Very dark/black (60 min)
SPF being usedSPF 30
300 min
Safe sun exposure time
Apply SPF 30+ every 2 hours. UV radiation causes skin damage even on cloudy days. UVA penetrates glass.

💪 Testosterone Symptom Checker

Check symptoms that may indicate low testosterone. Always confirm with a blood test.

Reduced sex drive (libido)
Erectile dysfunction
Decreased muscle mass despite exercising
Increased body fat, especially around abdomen
Persistent fatigue and low energy
Low mood, depression, or irritability
Difficulty concentrating or brain fog
Reduced bone density or osteoporosis diagnosis
Loss of body or facial hair
Reduced testicle size
Low testosterone (hypogonadism) is diagnosed via blood test. See your GP if you have 4+ symptoms. Testosterone replacement therapy (TRT) is available on the NHS.

🔵 Prostate Symptom Score (IPSS)

The International Prostate Symptom Score — a validated clinical tool for assessing urinary symptoms.

0
IPSS Score
No symptoms
If you score 8 or above, or are worried about any urinary symptoms, see your GP. A PSA blood test and prostate exam can rule out serious causes.

📏 Waist Risk Checker

Waist circumference is a strong predictor of heart disease, type 2 diabetes, and metabolic syndrome risk.

Waist circumference85 cm
85 cm
Your waist measurement
Low risk
NHS risk thresholds

🏋️ Gym Recovery Tracker

Log your last workout and track recovery readiness for each muscle group.

Most muscle groups need 48-72 hours of recovery. Training the same muscle before it's recovered increases injury risk and reduces gains.
Health Library

Learn about your health

Browse conditions, symptoms, and medicines — every card links to NHS, Mayo Clinic, and NICE for the full picture.

🔍
Prescriba
Trusted Sources

Where the
information comes from

Prescriba only draws from peer-reviewed, authoritative medical institutions. Click any card to read the original material yourself.

⚠️ Disclaimer: Prescriba provides general health information for educational purposes only. It does not constitute medical advice and is not a substitute for professional diagnosis or treatment. Always consult your GP. Emergency: 999 (UK) · 911 (US) · 112 (Europe).
Prescriba
About & Safety

Built with safety
at its core

Prescriba is a health information assistant, not a diagnostic tool.

What Prescriba is

An AI-powered health companion that helps you understand symptoms, learn about medicines, and know when to seek professional care. It draws from NHS, Mayo Clinic, NICE guidelines, and the BNF.

What Prescriba does — and never does

✓ Does

  • Ask questions and build a clinical picture
  • Give a clear assessment
  • Provide medicine information
  • Tell you when to see a GP or A&E
  • Immediately escalate emergencies

✗ Never

  • Formally diagnose conditions
  • Prescribe medication
  • Advise stopping prescribed drugs
  • Replace a qualified professional
  • Store or share conversations

Emergency escalation

These symptoms trigger immediate 999 guidance — before anything else:

Chest painDifficulty breathingStroke (FAST)AnaphylaxisSeizuresSuicidal thoughtsOverdoseMeningitis

Emergency contacts

Medical emergency: 999 (UK) · 911 (US) · 112 (Europe)

Urgent non-emergency: NHS 111

Mental health crisis: Samaritans 116 123 · Text SHOUT to 85258

Prescriba