Head-to-head · AI Symptom Checker Apps

NHS 111 online vs Ada Health

Updated Nov 2026
Both researched from official sources
4 checks side by side

Higher score NHS 111 online #1 in AI Symptom Checker Apps 9.3/10 Free plan Free plan✓ 3 of 3 features Visit NHS 111

Ada Health #4 in AI Symptom Checker Apps 8.4/10 Free plan Free plan✓ 3 of 3 features Visit Ada Health

NHS 111 online leads on 0 checks, Ada Health on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

Highest scoreNHS 111 online · 9.3/10
Free planboth

NHS 111 online scores higher on our rubric for ai symptom checker apps: 9.3 against 8.4 out of 10; our editors rank them #1 and #4.

On care guidance, NHS 111 online gives you Both where Ada Health offers Urgency.

NHS 111 online is the better fit for people aged 5+ in England seeking urgent care guidance. Ada Health is the better fit for people seeking free, guided symptom assessment.

NHS 111 online fits best
People aged 5+ in England seeking urgent care guidance
Ada Health fits best
People seeking free, guided symptom assessment

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Side by side

Show only differences

Feature	NHS 111 online 9.3/10 Visit ↗	Ada Health 8.4/10 Visit ↗
At a glance
Editor score	9.3	8.4
Ranking	#1 in AI Symptom Checker Apps	#4 in AI Symptom Checker Apps
Best for	People aged 5+ in England seeking urgent care guidance	People seeking free, guided symptom assessment
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Mobile	Cloud, Mobile
Platforms	Web, iOS, Android	Web, iOS, Android
Support	Email, Docs · 24/7	Tickets
Features NHS 111 online 3/3 · Ada Health 3/3
Web access	✓	✓
Mobile app	✓	✓
Follow-up questions	✓	✓
Specs
Symptom input	Guided	Guided
Care guidance	Both	Urgency
Age coverage	Children	Not checked yet
Our review
Pros	Free access on the web and through the NHS App Guided questions lead to self-care or care-service guidance May offer a nurse callback with a timeframe	Uses follow-up questions, demographics and risk factors in assessments Reports possible causes and their likelihood Offers safety-netting guidance on when to seek medical support
Cons	Assesses one main symptom at a time Provides guidance, not a diagnosis For people under 5, another NHS 111 route is needed	An assessment is not a diagnosis or a substitute for professional advice Mobile app availability varies by country Support is limited to tickets
Our verdict	For people aged 5 and over in England who need urgent advice for a non-life-threatening situation, NHS 111 online offers a guided symptom assessment. Users choose the main symptom they are concerned about and answer questions; the service… Read the review →	Ada Health offers a free symptom assessment service for people who want to explore possible explanations for symptoms before deciding on next steps. Users describe symptoms and answer follow-up questions; the system applies probabilistic… Read the review →

N NHS 111 onlineAI Symptom Checker Apps 9.3Free plan
A Ada HealthAI Symptom Checker Apps 8.4Free plan

Compare the top tools in

Strengths and trade-offs

NHS 111 online — where it wins
- Free access on the web and through the NHS App
- Guided questions lead to self-care or care-service guidance
- May offer a nurse callback with a timeframe
Where it doesn't
- Assesses one main symptom at a time
- Provides guidance, not a diagnosis
- For people under 5, another NHS 111 route is needed
Ada Health — where it wins
- Uses follow-up questions, demographics and risk factors in assessments
- Reports possible causes and their likelihood
- Offers safety-netting guidance on when to seek medical support
Where it doesn't
- An assessment is not a diagnosis or a substitute for professional advice
- Mobile app availability varies by country
- Support is limited to tickets

NHS 111 online9.3/10 · Free plan
Free guided triage points people aged 5 and over toward an appropriate next step.
Visit NHS 111 Full verdict →
Ada Health8.4/10 · Free plan
A free guided checker that estimates possible causes and offers urgency guidance.
Visit Ada Health Full verdict →