# DiagServer App vs ByOnSite

The clearest difference is update cadence: ByOnSite at every 2 months against DiagServer App's every 7 months. ByOnSite also leads on iOS requirement (9.0 vs 13.0). On price, ads, 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.

DiagServer App ships an update every 7 months, ByOnSite every 2 months. The most recent releases landed on September 8, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | DiagServer App | ByOnSite |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 21 MB | 37 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [INSTIT EUROPEEN SURVEILL PREDICT](https://appshunter.io/developer/1158028732) | [pierre moulin](https://appshunter.io/developer/1215771996) |

## What reviewers say

### DiagServer App

[App page](https://appshunter.io/ios/app/diagserver-app/id1158028733)

**Features:** macOS Compatibility

**In-app purchases:** none


### ByOnSite

[App page](https://appshunter.io/ios/app/byonsite/id1215771997)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DiagServer App free?

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

### Is ByOnSite free?

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

### Do DiagServer App or ByOnSite have ads?

Neither DiagServer App nor ByOnSite shows ads.

### Which is updated more often, DiagServer App or ByOnSite?

DiagServer App ships an update every 7 months, and ByOnSite every 2 months. Most recently, DiagServer App was updated on September 8, 2026 and ByOnSite on May 18, 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.*