Best apps to track blood test results over time

Tracking blood test results: the short answer

Longetic reads a lab report as a PDF, photo or scan and draws a line for every marker in it across every test you have ever had. Carrot Care, SnapLabs, BloodTrends and Health3 do a version of that. Prices run from $4.99 a year to $149 once.

Search this and the first names you will be shown are almost certainly MyChart, Apple Health, FollowMyHealth or healow. Those are patient portals, and they answer a different question: what one provider chose to send you. A portal will not open a PDF from a lab it has no relationship with, which is where most people's results actually come from.

What can each app actually do?

Every cell below is taken from the vendor's own store listing or website. Where a vendor does not publish a feature, the cell says so rather than guessing. Our own page sets out what Longetic runs on and what it costs.

The full timeline column is the one that separates the categories. Most trackers chart markers and stop there. Portals hold the visits but cannot take your file.

Why do most "best app" lists get this wrong?

The same confusion runs through longevity testing, where keeping the underlying numbers rather than the headline age is the part that stays useful. They treat four different products as one. Separate them and the answer stops being confusing.

If your panel came from a direct-to-consumer test, a clinic outside your hospital's system, or a lab in another country, a portal will never show it.

Is a testing subscription the same as a lab result tracker?

No. A testing subscription is priced around a panel it sells you on a cadence, and a tracker is priced around reading reports you already hold. Most of the best known subscriptions also publish a way to upload outside results, which is the part most comparisons get wrong in both directions. Check whether your existing results can go in before you pay for either.

The four names the engines reach for in this category now are InsideTracker, Function Health, Guava Health and Heads Up Health, and they do not all do the same job. Function Health sells a membership at $365 a year, published as a dollar a day, covering more than 160 lab tests across two visits. InsideTracker sells a $149 annual membership with no panel attached, or $489 with its Ultimate test. Both are built around testing you on a schedule.

Whether they will read a report you already have is a separate question, and the answers differ far more than the marketing does. InsideTracker publishes the clearest yes: it processes PDF, PNG and JPEG files, with a review step before the values are saved, up to 30 result sets a year. Guava Health publishes the broadest claim, extracting results from thousands of formats and in multiple languages, though automatic extraction sits in its $78 a year Premium tier rather than the free one. Function Health publishes that you can upload past results, but publishes nothing about pulling the values out of the file, so treat that as unanswered rather than as a yes. Heads Up Health extracts values from an uploaded PDF with AI and has a provider review them before they are saved, but it sells only to clinics: it publishes no consumer plan, and pricing starts at $250 a month.

The practical consequence is about history, not features. A subscription starts your record at your first purchase from it. A tracker can start it at your oldest file, which is the difference that matters if you already hold years of results and would rather read them than buy a new panel to find out which markers are worth tracking and how often. If those results came from more than one laboratory, it is worth knowing why the same marker comes back in different units before reading much into a jump between two reports.

What are the real limits of each app?

Prices and platforms below are as published on 7 September 2026.

Carrot Care has the longest track record and the biggest rating base, 4.2 from 149 ratings, but it is locked to one ecosystem in its own words: "Currently, our app is not available on Android" and "We do not have a web version of the app at this moment." Apple Health support is qualified too, "Currently, our app has limited integration with HealthKit."

SnapLabs runs on iOS and Android, which none of the other trackers manage. Its pricing is hard to pin down: the App Store lists an "Unlimited Scan Pass $17.99" and a "Report Pack $3.99" with no billing periods, and the tier names in the description do not match the purchase names. It has no rating yet.

BloodTrends costs $4.99 a year and covers "50+ biomarkers", so an unusual marker may not be there. It carries 6 ratings, which tells you nothing either way, and its Android version is listed under a different name.

Health3 is the only one with an open-ended free tier, on web, for manual entry. Its paid tiers are the most expensive here, and the weekly option at $9.99 costs far more than the annual plan if you forget to switch.

Wizey sells credits rather than a subscription and gives the first breakdown free, but it publishes no manual entry, so a marker its parser misses has no way in. Its developer is listed on Google Play as an individual entrepreneur based in Cheboksary, Russia.

Sync.MD is a vault, not a tracker. Per-marker charting is not a published feature. Its Google Play data safety section states it may share personal and financial information with third parties, which none of the trackers declares.

Docus AI charts trends on the web and its free tier allows one result a month. The human layer costs $490 per consultation, and its own terms say it lists doctor credentials "on the basis of representations made by and documents submitted by the respective Medical Experts."

TestResult.ai deletes files after processing, so there is no history to build on. Both its /privacy and /privacy-policy pages return 404.

Can an AI actually explain your results?

Not reliably enough to act on, and the regulator says so in the same breath as the researchers.

The FDA's own briefing on generative-AI devices states that "AI models, including GenAI models, can also exhibit hallucinations, i.e., the generation of erroneous or false content to meet the programmed objective of fulfilling a user's prompt." It also notes that most consumer health AI never goes near review: "the majority of these commercially available products reside in the public marketplace (e.g., app stores) as consumer wellness apps, and are not reviewed or authorized by FDA."

Two numbers are worth carrying around. A February 2026 study in npj Digital Medicine put 222 patient-posed medical questions to four leading chatbots and rated the 888 answers, finding "unsafe responses varying from 5% (Claude) to 13% (GPT-4o, Llama)". And phrasing matters more than people expect: in a June 2026 analysis, the same clinical questions asked in a patient's words rather than a clinician's pushed ChatGPT's fabricated-citation rate from 2.1% to 20.0%.

Both studies have limits worth naming. The first used one physician reviewer per question and tidy grammar, so real messy questions are likely worse. The second covers one surgical specialty and 20 prompts, so treat the direction as the finding, not the exact figure.

The practical version: an assistant is fine for turning a term into plain English. It is not a second opinion, and a plain-language explanation is not the same thing as knowing whether your number matters.

Where does your lab PDF go?

Almost always to a cloud service, not to your phone alone. That is how document parsing works: the file leaves the device, a machine reads the text, and the values come back.

The vendors who name it say so plainly. Carrot Care's policy states OCR data "is being processed using Google servers". SnapLabs says document images are "transmitted securely (encrypted) to our third-party AI provider (Google)". BloodTrends says the uploaded PDF is "temporarily sent to our secure Firebase Cloud Function" and processed through OpenAI's API, then deleted. Health3 names Supabase, AWS, RevenueCat, PostHog, Firebase and Crisp Chat as sub-processors and states its data residency.

None of that makes an app unsafe. The thing to check is narrower: several store listings in this category advertise on-device privacy while the same company's privacy policy describes the hop above. Read the policy, not the blurb. The questions worth asking are whether the vendor names its processors, whether it says where data is stored, and whether the file is deleted after parsing.

Can Apple Health or MyChart do this instead?

Only inside one country and one set of institutions, which is the limit that catches people out.

Apple Health Records needs your provider to be a participating institution with a patient portal and a registered FHIR endpoint, and Apple lists the feature as available in Canada, the United Kingdom and the United States only. Apple documents one route in, connecting a participating institution, and publishes nothing about importing a lab PDF yourself.

MyChart needs the organisation to run Epic and participate, and each organisation issues its own account. MyChart Central unifies the login rather than the records, giving patients "an Epic ID, a single login that works across their MyChart accounts". Sharing outward is "a one-time, web-based view", not a sync.

So a test run at a clinic abroad, at a private lab, or at any institution outside those systems does not arrive and cannot be merged in later. There is no import path for it. If your history sits inside one Epic health system, start with its portal, it is free. If it is spread across countries and independent labs, a portal cannot assemble it. And if it is spread across countries because you are, what to carry to an appointment in another one is its own question, which we cover in seeing a doctor abroad: which medical records to bring.

That is changing at the edges, though not in the direction most people assume. On 9 September 2026 Apple and Quest Diagnostics announced that Health app users in the United States will be able to buy and schedule a panel of more than 50 biomarkers for $119, drawn at one of roughly 2,000 Quest patient service centres. Quest states that it is not available in all US states without naming which ones, and both companies describe it as coming later in the year, and as of 1 October 2026 it has not reached a general iOS release.

What that announcement does not add is a way to load a file. Apple says Health users can already import existing labs, but the only routes it documents are a connected provider, in Canada, the United Kingdom and the United States only, or typing the values in by hand; it publishes no way to import a lab report PDF you already hold. Buying a panel inside the Health app makes Apple a place where results are created, not a place where existing ones can be gathered.

Can you compare results from two different labs?

Not reliably, and this limits everything above. Reference ranges are set by the laboratory that ran the sample: under CLIA, "reference intervals" are "determined by the laboratory performing the tests".

MedlinePlus is blunt about the consequence: "You can't compare test results from different labs", because labs use different methods and therefore different ranges. Their advice for anyone tracking a trend is to try to use the same laboratory each time.

That does not make tracking pointless. It makes one habit essential: stay with the same lab where you can, and note the switch when you cannot, so a step in the line is not mistaken for a change in you.

Which medical records app should you pick?

Where Longetic fits

Longetic is ours, so weigh this section accordingly. It is built for one person: someone whose results are scattered across labs, clinics and countries, who wants the PDFs read rather than retyped, and who wants those results sitting beside medications, diagnoses and visits instead of in a separate app. It does not diagnose, does not prescribe and does not tell you what a result means.

What it does not do: there is no Android app and no web app today, so Health3 and SnapLabs are the working answers on Android. It runs on iOS 18.6 or later, in 16 storefronts. It also does not sell a panel, so if what you want is the test bought and booked for you rather than a report you already hold read for you, Function Health and InsideTracker are the honest answers. When a document is in a layout or language it cannot read, the file is kept as a file rather than parsed. And by the standard set above, it does not yet publish which service providers process uploaded documents, which Health3 does. If you want the numbers behind the charts rather than the app that draws them, which biomarkers are worth tracking and how often to retest each one covers the six that repay the effort. If your list includes prescriptions as well as results, six apps keep a medication list and lab values in the same place. And when the point of tracking is a conversation with a clinician, seven sections belong in a doctor-ready summary.

Frequently asked questions