5 Best DICOM Viewers for Android and iOS: Free and Paid Apps

Ever wished you could carry medical imaging right in your pocket?

A mobile DICOM viewer enables this.

Mobile DICOM viewer apps and cloud platforms let you securely view CT, MRI, ultrasound, and other medical images on your smartphone or tablet at any time, anywhere. From quick case reviews to patient consultations, mobility is transforming how imaging fits into everyday healthcare. Unlike free online DICOM viewers, mobile versions are handy and easy to use.

Discover why you need a mobile DICOM viewer, which mobile DICOM viewers are best, and how to choose the right one.

Why Use a Mobile DICOM Viewer?

In today’s healthcare environment, time and accessibility matter more than ever. Clinicians, students, and even patients expect to access medical images without being tied to a workstation.

That’s where a mobile DICOM viewer changes the game. It takes the power of imaging out of the radiology suite and puts it directly into your pocket.

Convenience: Access Images Anywhere

Mobile DICOM viewers enable you to review scans from anywhere, whether you’re on hospital rounds, consulting from home, or traveling. Instead of waiting to log into a desktop PACS system, images can be pulled up instantly on a phone or tablet.

This saves valuable time in urgent care scenarios and improves collaboration between care teams. Medicai, for example, offers cloud-based access, making this process seamless on any device.

Accessibility: Quick Reference for Teaching and Communication

Medical images are often needed beyond the reading room. A surgeon may want to show a patient their CT before a procedure. A professor might use anonymized scans in a lecture.

With mobile viewers, this information is right at your fingertips. By lowering the barriers to access, mobile DICOM tools support both clinical communication and medical education.

Versatility: For Clinicians, Students, and Patients

The value of mobile imaging isn’t limited to radiologists.

Emergency physicians can review scans at the bedside. Radiology students can study real cases on their phones. Even patients can engage more actively in their care by viewing their own studies through secure platforms.

Workflow Integration: Connect with PACS and Cloud

Mobile DICOM viewers don’t exist in isolation; they tie directly into existing systems.

Most modern apps integrate with PACS servers or cloud storage, enabling secure image retrieval without additional steps. That means clinicians can move fluidly from desktop to mobile without losing context.

With Medicai’s cloud-first design, healthcare teams can upload, view, and share studies securely across devices, making collaboration faster and more reliable.

Key Features to Look For in a Mobile DICOM Viewer

Not all DICOM viewers are created equal. Let’s see the key features of DICOM viewers to consider when evaluating mobile options.

Platform Compatibility: iOS and Android

The first thing to check is whether the app is compatible with your device. Many tools are built for either iOS or Android, but not both. Cross-platform solutions are more flexible, especially for teams working across multiple devices. Browser-based mobile viewers retrieve images without installed software because they rely on DICOMweb, specifically WADO-RS, to stream pixel data over HTTPS.

Cloud-based viewers, such as Medicai, take this a step further by working directly in mobile browsers, eliminating the need for downloads.

PACS Support and Integration

A strong mobile viewer should connect to hospital PACS systems or cloud PACS. This helps in direct querying, retrieval, and review of images from the central archive, eliminating the need for manual transfers.

For practices that rely on speed, this integration is essential.

Core Viewing Tools

Even on a phone, radiologists and clinicians need reliable tools:

• Pan and zoom for detailed exploration.
• Window and level adjustments to highlight different tissues.
• Distance and angle measurements for accurate clinical use.
• Image inversion and rotation for flexible analysis.

These features turn a mobile app into a practical diagnostic tool rather than just a file opener.

Advanced Features: MPR and 3D Rendering

Some mobile viewers go beyond the basics. Multiplanar reconstruction (MPR) lets you scroll through cross-sections of CT or MRI scans. 3D rendering tools allow for interactive visualization of anatomy.

While not every free app includes these, advanced mobile viewers are bringing these capabilities to handheld devices.

Security and Privacy

The most critical feature is compliance with data security standards.

A mobile viewer must protect patient health information through encryption, secure login, and adherence to HIPAA/GDPR guidelines. While free apps that open local files are great for learning, they may not be safe for clinical use.

Cloud PACS platforms, such as Medicai, stand out for combining mobility with enterprise-grade security, ensuring access is both easy and compliant.

5 Mobile DICOM Viewers Compared

Medicai publishes this guide and makes one of the apps below. Each app’s price, platforms, and limits are taken from its developer’s site or app store listing, as of October 2026.

Not every clinician or student needs the full power of an enterprise DICOM system on their phone. Sometimes, a free and lightweight mobile viewer is all that’s required.

Luckily, there are several free DICOM Viewer tools that make this possible. Here are five of the best options.

1. IDV – IMAIOS DICOM Viewer (Android & iOS)

A long-standing favorite in the medical education community, IMAIOS IDV offers a simple yet reliable way to view DICOM files on mobile devices. It’s ideal for private study and non-commercial use where quick access is more important than advanced tools.

IMAIOS says the viewer is free for personal and non-commercial use and that your files are not uploaded to its network. It also states that IDV is not a medical device and is not CE or FDA approved, so it is for learning and personal viewing, not diagnosis.q

• Supported modalities: CT, MRI, PET, and ultrasound.
• Viewing tools: scroll, zoom, contrast adjustments, and basic measurements.
• Offline access: images are stored locally to ensure privacy.
• Best for: medical students and educators who need quick, safe access to images without relying on internet connections.
• Limitation: not FDA-cleared for diagnostic use in clinical settings.

2. Medicai Mobile Imaging App (Android and iOS)

The Medicai Mobile Imaging App is a native app for Android and iOS that connects to Medicai’s cloud PACS. Studies arrive from connected PACS and scanners or from patient uploads, and open in a zero-footprint viewer with window/level, pan and zoom, cine scrolling, measurements, annotations, multiplanar reconstruction, 3D reconstruction, and side-by-side comparison.

Sharing works through controlled access and a secure link, so a study is not copied to every device, and patients do not need to install the app to view a scan someone shares with them. The phone camera is used to capture supporting documents, such as referral letters or wound photos; imaging studies themselves are received as DICOM files.

The app is part of Medicai’s paid platform, with a 14-day free trial. Medicai describes it as built for access, review, and collaboration; whether it can be used for diagnosis depends on your organization’s configuration and compliance requirements.

Best for: clinics and care teams that already store studies in the cloud and want them on their phones.

If you only need to open a few files you already have, the free online DICOM viewer requires no account and processes files in your browser. It is for research and educational use, not primary diagnosis.

• Cross-platform: works on Android and iOS through any secure browser.
• Integration: connects to cloud PACS for study upload, storage, and sharing.
• Collaboration: includes annotations and secure study sharing with colleagues or patients.
• Best for: clinicians, students, and small practices who want a free yet professional-grade tool.

3. OsiriX HD (iOS only)

A trusted name in the world of DICOM, OsiriX HD brings the same smooth viewing experience of its desktop counterpart to iPhones and iPads. It’s especially popular among Apple users seeking a well-designed and dependable app.

• Supported modalities: CT, MRI, PET, ultrasound.
• Viewing tools: scrolling, basic measurements, and smooth navigation.
• Best for: iOS users seeking a polished, professional viewer backed by a long-standing brand.
• Limitation: OsiriX HD is a paid app for iPhone and iPad, listed at $9.99 a month on the OsiriX site, with PET-CT fusion available on iPad only. The developer states it is not suitable for primary diagnosis; the FDA-cleared product is OsiriX MD, which runs on a Mac.

4. mRay (iPhone and iPad)

mRay from mbits imaging is a free app on the App Store for viewing CT, MR, and other radiology images on iPhone and iPad (iOS 15 or later). It is built for hospital teams: it connects to the PACS through a small server application and adds messaging, voice messages, calls, and query-and-retrieve, so colleagues can discuss a case around the images. The developer notes that when mRay is used for diagnosis, national regulations apply and an appropriate display must be used. The App Store lists no Android version.

• Lightweight: optimized for fast loading and smooth navigation.
• Viewing tools: basic panning, zooming, and scrolling.
• Best for: hospital teams on iPhone and iPad that need on-call access to their PACS.
• Limitation: still in beta; not yet as feature-rich as the desktop version.

5. A web viewer in your phone’s browser

If you do not want to install anything, a zero-footprint web viewer runs in Safari or Chrome on a phone or tablet, provided the service supports mobile browsers. Cloud PACS platforms usually work this way, allowing a doctor to open a shared study via a link. A phone screen is fine for a quick look or for explaining a scan to a patient, but it is not a diagnostic display. For how these viewers work, see our guide to the DICOM web viewer.

• Platform: native for macOS, mobile accessible via cloud sync.
• Features: advanced tools for 2D/3D reconstruction, measurements, and annotations.
• Best for: quick review of a shared study, with nothing to install.
• Limitation: no dedicated Android/iOS app; requires desktop-to-cloud workflow for mobile access.

On a Mac or PC, see our guides to the DICOM viewer for Mac and the DICOM viewer for Windows, as well as our comparison of the best DICOM viewers.

Conclusion

Mobile DICOM viewers make it easier to view, share, and discuss medical images outside the reading room, but none of the free apps here are intended for primary diagnosis. From quick offline study with IDV to advanced Mac workflows with Horos, these tools bring flexibility to students, clinicians, and patients alike.

The right app depends on your role: IMAIOS for learning, OsiriX HD or mRay for iPhone and iPad users who work with OsiriX or a hospital PACS, and the Medicai Mobile Imaging App for teams that store studies in Medicai’s cloud.

Whether you’re learning, teaching, or treating, having imaging at your fingertips makes healthcare faster, smarter, and more connected.