Comparison

e vs Lumen

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

e

This application provides a complete endoscopic imaging system for iPhones, offering full control over focus and exposure for professional-quality images. It supports both medical and non-medical endoscopes, with features like frame-by-frame replay and customizable memory settings.

Highlights
  • Full focus and exposure control
  • Frame-by-frame replay
  • Still shot capture
  • Sound recording
  • Customizable memory settings
  • HD video recording
  • Touch ID/Face ID/PIN security
Features
Read full description

The worlds first and only complete endoscopic imaging system for iPhone. endoscope-i Ltd have perfected endoscopic mobile imaging with e-i Pro. When used with an endoscope-i adapter on iPhone the app gives the user full control of focus and exposure to get the perfect endoscopic image every time. Simple to use and as effective as a stand alone stack system. Can be used with both non-medical and medical endoscopes. Medical endoscopes and adapters should be appropriately approved for their intended use in the end user marketplace. This app is not intended for personal medical use. If used in conjunction with a medical endoscope, the user should be appropriately qualified and trained. All users of this app should seek a doctors advice prior to making any medical decisions. e-i Pro features: •Touch ID/Face ID and/or PIN security •Centralisation of the image •Full screen endoscopic viewing •Frame by frame replay •Still shot capture when reviewing video images •Sound recording when required during video (not available in HD mode) •5 Customisable memory settings for up to 5 different endoscope/light combinations •Fully compatible with AirDrop, mail and photo library sharing •Landscape and portrait image viewing and recording •HD video recording in e-mailable file sizes •24/7 Customer support via email The e-i Pro application is a product of endoscope-i limited, developed in conjunction with Base8Apps

About

Lumen

Read full description

Lumen opens the radiology zip your patient brought in. No upload, no cloud, no signup — just pixels, at native resolution, on every Apple device you own. Designed for healthcare professionals reviewing studies they already have authority to access. Lumen is positioned for education, case review, and second-read scenarios. It is NOT a medical device and is not intended for primary clinical diagnosis. WHAT YOU CAN OPEN • DICOM / IHE-PDI zip archives — the format most patient CDs ship as • ISO 9660 disk images directly, no manual mount or repackage needed • Folders of DICOM files • Open via Files.app, share sheet, or in-app picker • No file at hand? Five sample scans come with the app: real, de-identified CT, MRI and X-ray studies PERSISTENT LIBRARY • Every imported archive lives in your device's Lumen folder, visible in the Files app • Every scan shows a preview of its images, its modality and number of series • Re-open with one tap from the home screen; no re-importing • Delete an archive from its menu — along with all the videos exported from it VIEWING • Full native bit-depth display, with pinch zoom, drag pan, and double-tap toggle • Window/level by drag: vertical for brightness, horizontal for contrast — sensitivity scales with the active window so wide CT and narrow brain windows feel equally responsive • One-tap modality presets (CT: soft tissue, bone, lung, brain, abdomen, liver) • Per-instance metadata sheet with manufacturer, matrix, bit depth, transfer syntax, SOP class, and a built-in radiology acronym glossary VOLUMETRIC TOOLS • Automatic detection of stackable volumes from the slice geometry tags, with a 3D / 4D badge in the browser so you can see at a glance which series are reconstructable • Multi-planar reconstruction (MPR): axial, sagittal, and coronal reformats side by side, with crosshair-linked navigation — tap one plane to jump the other two • Slab projection: maximum-intensity (MIP), minimum-intensity (MinIP), or average over 3 to 50 slices — great for vessels, lungs, and noise reduction • True 3D volume rendering: a Metal-powered raycaster with four rendering modes — Surface (solid skin/bone shell with gradient lighting and per-volume tone presets), Anatomy (coloured tissue transfer function), Volume composite (grayscale translucent depth), and MIP • Tissue isolation presets per modality (bone, skin, soft tissue, lung, liver) — hide everything else from the volume with one tap, no per-slice masking • Two-finger pan, drag-rotate, pinch-zoom, auto-rotate cine, and an axis-aligned clipping plane (sagittal / coronal / axial) for cutting away half the volume to see inside • Save the current 3D view as a PNG snapshot at 2× the on-screen resolution, sharable via Photos, AirDrop, Files, or Mail DYNAMIC 4D ACQUISITIONS • Native support for dynamic contrast-enhanced series (e.g. dyn_eTHRIVE liver MR, perfusion MR, dynamic angio): every timepoint becomes its own 3D volume • Timepoint slider in MPR and 3D with cine playback — watch contrast wash through over time • All timepoints prefetched in the background and persisted to an on-device cache, so scrubbing across timepoints stays instant across launches SHARING • Export any series as an H.264 MP4 at 10, 15, or 30 fps • Saved next to its source archive in the Lumen folder of Files.app • Share via the standard share sheet, or copy to iCloud Drive • PNG snapshots of the 3D view share PRIVACY BY DEFAULT • Everything stays on this device • No analytics on file contents, no account, no tracking SDKs • Patient data leaves the device only when YOU choose to share an export • Lumen never connects to the internet: even the sample scans come with the app • A file that won't open? Lumen explains why and, if you want, emails us the technical details — never names, dates or images Lumen is intentionally positioned as an educational and second-read tool. It is not a regulated medical device in any jurisdiction. See the in-app disclaimer for the full statement.

Screenshots

e2 screens
Lumen4 screens

Verdict

The call

The clearest difference is price: Lumen at $9.99 against e's $50.00. Lumen also leads on update cadence (fortnightly vs every 4 months) and device support (4 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

e costs $50.00 and Lumen $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

e ships an update every 4 months, Lumen fortnightly. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
e versus Lumen: the parameters behind the verdict, then further details
ParametereLumen
Price$50.00$9.99 — better
Rating2.3 (3 ratings) — better—
Positive reviews42.9% of reviews—
Number of ratings3 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad, Mac, Vision Pro — better
Requires iOS17.617.0 — better
Further details — not scored
Size4 MB166 MB
Age rating4+4+
DeveloperBase8AppsMarco Tini

In-app purchases

None

e

No in-app purchases

None

Lumen

No in-app purchases

Questions

Is e free?
e costs $50.00, with no in-app purchases.
Is Lumen free?
Lumen costs $9.99, with no in-app purchases.
Do e or Lumen have ads?
Neither e nor Lumen shows ads.
Which is updated more often, e or Lumen?
e ships an update every 4 months, and Lumen fortnightly. Most recently, e was updated on October 13, 2026 and Lumen on October 12, 2026.

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