Telehealth: real strengths, real limits
Telehealth is genuinely good at several things. Follow-up appointments where the purpose is to review results, adjust a medicine or check on progress lose very little by happening over video. Mental health care translates unusually well, and access improves substantially for people who would otherwise travel or wait. Medication management, chronic disease reviews, dermatology triage on a good photograph, and specialist input into rural or under-served areas are all areas where remote care removes a barrier rather than adding one.
The limits are equally real. A physical examination cannot be done down a camera: palpating an abdomen, listening to a chest, assessing a swollen joint, measuring blood pressure properly, checking an ear. Anything acute and undifferentiated — new severe pain, breathlessness, a child who is unwell — usually needs someone in the room. Video also amplifies existing inequities, since it presumes a device, a connection, a private space and some digital confidence. The sensible model is a blend, chosen by what the visit is actually for, rather than a preference for one channel in all circumstances.
Digital therapeutics and the wellness-app boundary
A digital therapeutic is software intended to treat or manage a condition, typically by delivering a structured evidence-based programme — most often a form of cognitive behavioural therapy — with the same intent as a drug or device. Some have been through regulatory review and clinical trials, particularly in insomnia, substance use and some psychiatric conditions. Digital CBT for insomnia is the best-established example, with a solid evidence base and a recommendation for CBT ahead of medication as first-line treatment for chronic insomnia.
The boundary that matters to you is regulatory. A product making a treatment claim for a specific condition is generally a device and is regulated as one. A product describing itself as supporting wellness, promoting relaxation or helping you build habits is not, and can be sold with no evidence at all. Most of what is in an app store is the second category. That is not necessarily a problem — a habit tracker does not need a clinical trial — but it means the marketing language carries no guarantee, and a five-star rating measures how pleasant an app is, not whether it works.
Remote patient monitoring
Remote monitoring means a device at home sending data to a clinical team: blood pressure cuffs, weight scales in heart failure, glucose meters and continuous glucose monitors, pulse oximeters, implanted cardiac device telemetry. The evidence is strongest where three conditions hold — the measurement is reliable, the trend means something clinically, and there is a defined action when it crosses a threshold. Heart failure weight monitoring, hypertension management and diabetes are the clearest cases.
Where those conditions do not hold, monitoring generates alerts rather than benefit. A stream of data with nobody responsible for reading it is worse than no data, because it creates a false impression of oversight, and alert fatigue is a well-documented failure mode in clinical systems. Before enrolling in a monitoring programme it is worth asking who reads the data, how quickly, what happens out of hours, and what specifically triggers a call. Our blood pressure tracker and blood sugar tracker are built for the version of this you run yourself and take to an appointment.
Smart hospitals and the electronic record
Inside hospitals, the digital story is mostly about the electronic health record and what sits on top of it: computerised ordering with interaction checking, barcode scanning at the bedside, early-warning scores calculated automatically, and command centres that model bed capacity and patient flow. The gains are real but administrative rather than dramatic, and the well-documented costs — clinician time spent documenting, alert fatigue, and interfaces that were designed for billing before care — are part of the same story.
The part that matters most to you as a patient is access to your own record. In the US, information-blocking rules have made electronic access to test results, notes and records substantially easier and faster, sometimes uncomfortably so, since results now often arrive before a clinician has discussed them. On balance this is a good development: people who can see their own record catch errors, prepare better questions, and are less dependent on a phone call that never comes. Ask your provider how to get portal access and how to download a copy you keep yourself.
Health data privacy: the part people skip
In the United States, HIPAA covers healthcare providers, health plans, healthcare clearinghouses and the business associates working on their behalf. It does not cover most consumer health apps, most direct-to-consumer testing companies, wearable manufacturers, symptom checkers, period-tracking apps or wellness platforms you sign up for yourself. When you type symptoms into an app you found in a store, the protections that apply are the ones in that company's privacy policy and general consumer-protection law — not clinical privacy law. Many people assume the opposite, and the assumption is the problem.
That gap has consequences. Consumer health data has been shared with advertising and analytics partners, sold to data brokers, and exposed in breaches, and the FTC has taken enforcement action over health apps sharing sensitive information contrary to their own representations. Data can also be transferred if a company is acquired or goes bankrupt, which is when privacy promises are tested hardest. Genetic data deserves particular care because it is not only about you — it carries information about relatives who never consented — and it cannot be reissued like a password.
What to check before you share health data
Five checks take a few minutes. Who is the company, and what is their business model — if the product is free, work out what is being sold. Does the privacy policy permit sharing with advertisers, analytics providers or data brokers, and can you opt out. Is the data linked to your identity or genuinely de-identified, remembering that health data is easier to re-identify than most people assume. Can you delete your account and your data, and does deletion actually remove it from backups and from partners. And where is data stored and under which jurisdiction.
Then apply a simpler filter: would you be comfortable if this specific information were attached to your name in a data-broker file — a mental health diagnosis, a pregnancy, a sexually transmitted infection, a genetic risk marker. For anything in that category, prefer a service covered by clinical privacy rules, or keep the record yourself. That is the reasoning behind the design of every tool on this site: they run entirely in your browser, store data in your own device's local storage, and never send it to us. Our privacy policy sets out exactly what that means.