Marker · Blood Test Tracker
Lab Results & Biomarker Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Your lab results, read on your iPhone and nowhere else. Import by PDF, photo, or hand — see each value next to the range printed on your report and follow it over time.
Marker turns your lab reports into a clear, private record you actually keep.
Bring a report in four ways:
• Open a PDF from Files
• Share a PDF or image from another app
• Snap a photo of a printed result
• Type values in by hand
Marker reads the report on your device and lays out each value next to the reference range that is printed on that same report — within range, above range, or below range, in plain descriptive words. No app-invented ranges, no scores, no verdicts. When a value looks uncertain, Marker flags the line and lets you check or correct it before anything is saved, so your history stays clean.
Watch a value move over the years. Each marker opens into a timeline chart with the printed reference band drawn behind it, so you can see the shape of your own data across every report you have kept.
Understand what you are looking at. For common markers — full blood count, the modern lipid panel including ApoB and Lp(a), liver, kidney, thyroid, and vitamins — Marker shows a short, plain-language description of what the value measures, with its source cited. Descriptions only; Marker does not tell you what to do.
Private by design:
• Everything stays on your iPhone
• No account, no sign-in, no cloud
• No content-reading analytics — your lab results stay on your device
Marker is for informational use only and is not a medical device. It does not provide a diagnosis, medical advice, or treatment recommendations. Reference ranges come from your own lab report. Always talk to a qualified professional about your results.
Free to start. Marker Pro (annual or one-time Lifetime) unlocks unlimited reports and the full history.
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PAYMENT, RENEWALS, TERMS & PRIVACY
Marker Pro is an annual auto-renewable subscription with a 3-day free trial, or a one-time Lifetime purchase (no renewal). Prices are shown in the app and on the App Store. The yearly plan renews automatically unless cancelled at least 24 hours before the period ends — manage or cancel anytime in Settings. Marker is free to start.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://zllhff.github.io/marker/privacy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Jan Zellerhoff, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jan Zellerhoff
- Size
- 9.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Marker Pro (Lifetime) $44.99
- Marker Pro (Annual) $24.99
- Copyright
- © 2026 Jan Zellerhoff