# Dierre Smart Door vs Ping Door

The clearest difference is update cadence: Ping Door at every 2 months against Dierre Smart Door's every 25 months. Dierre Smart Door's advantage is iOS requirement (9.0 vs 16.6). 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.

Dierre Smart Door ships an update every 25 months, Ping Door every 2 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Dierre Smart Door | Ping Door |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 2 months** |
| Size | 19 MB | 97 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dierre Spa](https://appshunter.io/developer/450736225) | [GNC PROSES OTOMASYON ELEKTRIK ELEKTRONIK MUHENDISLIK SANAYI VE TICARET LIMITED SIRKETI](https://appshunter.io/developer/1446284203) |

## What reviewers say

### Dierre Smart Door

[App page](https://appshunter.io/ios/app/dierre-smart-door/id452715336)

**In-app purchases:** none


### Ping Door

[App page](https://appshunter.io/ios/app/ping-door/id6755127832)

**In-app purchases:** none


## Frequently asked questions

### Is Dierre Smart Door free?

Dierre Smart Door is free to download, with no in-app purchases.

### Is Ping Door free?

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

### Do Dierre Smart Door or Ping Door have ads?

Neither Dierre Smart Door nor Ping Door shows ads.

### Which is updated more often, Dierre Smart Door or Ping Door?

Dierre Smart Door ships an update every 25 months, and Ping Door every 2 months. Most recently, Dierre Smart Door was updated on November 1, 2026 and Ping Door on November 5, 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.*