# E vs SmartVUS zn

The clearest difference is ads: SmartVUS zn at none against E's shown. E's advantage is iOS requirement (10.3 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

E ships an update every 4 months, SmartVUS zn every 2 months. The most recent releases landed on September 6, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | E | SmartVUS zn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/e-diagnostic/id1387730960/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 42 MB | 9 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [333 Corporate 1998, S.L.](https://appshunter.io/developer/601314449) | [SonopTek Co, Ltd.](https://appshunter.io/developer/1077612429) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-diagnostic/id1387730960)

This diagnostic tool helps identify potential swine diseases based on observed symptoms and animal age. It provides detailed descriptions and images of conditions, acting as an illustrative guide for users registered on pig333.com.

**Highlights:** Swine disease and condition descriptions, Images of major swine diseases, Symptom-based diagnosis, Age-specific disease lists, Detailed disease information, Multilingual support (English, Spanish)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SmartVUS zn

[App page](https://appshunter.io/ios/app/smartvus-zn/id1547566836)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E free?

E is free to download, with no in-app purchases.

### Is SmartVUS zn free?

SmartVUS zn is free to download, with no in-app purchases.

### Do E or SmartVUS zn have ads?

E shows ads; SmartVUS zn does not.

### Which is updated more often, E or SmartVUS zn?

E ships an update every 4 months, and SmartVUS zn every 2 months. Most recently, E was updated on September 6, 2026 and SmartVUS zn on September 25, 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.*