Goniometer: Range of Motion

Digital Joint ROM Measure

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Turn your iPhone into a goniometer — 55 movements, neck to fingertips, with guided placement. Try Pro free: no card, no auto-charge, no subscription. Measure joint range of motion with the device already in your pocket. Goniometer turns the iPhone's motion sensor into a clinical-style goniometer: place the phone against the limb, read the live angle, and lock it when steady. Built for occupational and physical therapists, hand therapists (CHTs), chiropractors, physicians, nurses, athletic trainers, ATPs, and students — and used by patients tracking recovery at home. Reviewed against standard supine technique. Smartphone inclinometer measurement has been shown valid and reliable (Keogh et al., systematic review, PLOS ONE, 2019). Measuring is free and unlimited: all 55 movements, every joint from the neck to the fingertips, plus Quick Angle and a built-in Level. No measurement caps, no ads, no account, and no trial needed to measure. The free tier also includes your first patient profile, unlimited PDF and CSV export (watermarked, never capped), and a Face ID lock. Pro is a one-time purchase, never a subscription. MEASURE IN SECONDS • Live, gravity-referenced angle, large and readable • Flat and upright starts read 0° automatically — no calibration, with a Set Zero override for patients who can't reach the standard position • Stability indicator: lock only when steady • Optional spoken angle, so both hands stay free ANIMATED PLACEMENT GUIDES Every movement has a step-by-step animated guide with an anatomical diagram: patient position, exactly where the iPhone lies, and the motion from start to end range. 55 MOVEMENTS — NECK, UPPER AND LOWER EXTREMITY, AND EVERY FINGER Cervical spine flexion, extension, lateral flexion, and rotation · shoulder flexion, extension, abduction, and internal/external rotation · elbow flexion and extension · forearm pronation and supination · wrist flexion, extension, and radial/ulnar deviation · hip flexion, extension, abduction, adduction, and internal/external rotation · knee flexion and extension · ankle dorsiflexion and plantarflexion. HAND & FINGER ROM Measure every finger and thumb joint — MCP, PIP, and DIP (and thumb MCP/IP), flexion and extension — with a guided two-placement technique. Patient Profiles compute Total Active Motion (TAM) per digit automatically — a standout for hand therapists (CHTs). QUICK ANGLE & LEVEL — MEASURE ANY ANGLE Measure any angle with Quick Angle — wheelchairs, splints, ramps, and seating — and check that footplates and trays sit even with the built-in Level. NORMAL ROM REFERENCE A searchable reference of normal range values, linked to each placement guide. PATIENT PROFILES — YOUR FIRST ONE IS FREE Create a profile with a de-identified label, a movement checklist, and left/right sides, then record a reading for each movement. Tag readings active or passive (AROM/PROM) and add, correct, or backdate any reading. A deletable example patient shows trend charts, summaries, and reports instantly. PRIVATE BY DESIGN — NO DATA COLLECTED Fully offline: no accounts, no servers, no analytics, no tracking — the App Store privacy label reads "Data Not Collected." Profiles use de-identified labels, are encrypted on device, stay out of cloud backups, and leave your iPhone only when you export a report yourself. Designed to support HIPAA-compliant documentation, with a Face ID lock and permanent deletes. TRY PRO FREE Use every Pro feature free as you get started — no credit card, no auto-charge, nothing to cancel. GONIOMETER PRO • Unlimited patient profiles • Progress history: every reading kept and graphed • Goal tracking: a target angle per movement, on every chart and report • Total Active Motion (TAM) per finger, computed automatically • Side-to-side comparison as a percentage of the other limb • Watermark-free PDF and CSV reports with clinical summary and charts • Clinic letterhead: your clinic's name and logo on every report • Hands-free auto-lock once the limb is held steady Goniometer is an educational and reference tool. It is not a medical device and is not intended for diagnosis or treatment decisions.

Ratings & Reviews

  • 4.7
    out of 5
    13 Ratings

• 8 new movements — forearm pronation and supination, shoulder extension and internal rotation, and hip extension, abduction, adduction, and internal rotation. 55 movements in all, neck to fingertips • New "See what's included" screen: a clear side-by-side of what's free versus Pro, so you always know measuring stays free • Polish, accessibility, and reliability improvements

Version 1.8.0

The developer, KEVIN LAN, 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 Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • VoiceOver

      • Larger Text

      • Dark Interface

      • Sufficient Contrast

      • Reduced Motion

    Information

    Seller
    • KEVIN LAN
    Size
    • 3.6 MB
    Category
    • Medical
    Compatibility
    Requires iOS 16.6 or later.
    • iPhone
      Requires iOS 16.6 or later.
    • Mac
      Requires macOS 13.5 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English and Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Kevin Lan
  • Developer Website
  • Privacy Policy

    • More by KEVIN LAN

    You Might Also Like