# e vs Lumen

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.

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

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

## The numbers

| Metric | e | Lumen |
| --- | --- | --- |
| Price | $50.00 | **$9.99** |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/e-i-pro/id757951972/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 4 MB | 166 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Base8Apps](https://appshunter.io/developer/565933099) | [Marco Tini](https://appshunter.io/developer/544232459) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-i-pro/id757951972)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Lumen

[App page](https://appshunter.io/ios/app/lumen-dicom-viewer/id6776353922)

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*