# D vs Oppen

The clearest difference is review sentiment: D at 100% against Oppen's 10%. D also leads on rating (4.7 vs 4.3) and ratings volume (97 vs 22). On price, update cadence, ads and in-app purchases there is nothing between them.

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

D holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 97 and 22 respectively. Written reviews point the same way: 100% of D's written reviews are positive against 10% of Oppen's.

D ships an update every 3 weeks, Oppen monthly. The most recent releases landed on October 4, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | D | Oppen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (97 ratings)](https://appshunter.io/ios/app/d-keys/id1502365079/reviews)** | [4.3 (22 ratings)](https://appshunter.io/ios/app/oppen/id1509471350/reviews) |
| Number of ratings | **97** | 22 |
| Positive reviews | **100.0% of reviews** | 9.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 134 MB | 95 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kuznetsova Vera](https://appshunter.io/developer/1451290672) | [Oppen Tekh, OOO](https://appshunter.io/developer/1206575839) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-keys/id1502365079)

Remotely control your intercom with a single button press on your smartphone. Open your building's entrance door from anywhere using Wi-Fi or mobile data. Registration is required to ensure security and access.

**Highlights:** Remote door opening, Single-button control, Works via Wi-Fi or mobile data, Supports multiple entrances, Remote access for guests, Secure registration process

**In-app purchases:** none


### Oppen

[App page](https://appshunter.io/ios/app/oppen/id1509471350)

This app provides keyless access to your building, office, or gates. It offers hands-free entry and the ability to grant temporary guest access. Easily set up your access points and explore its features with a free trial.

**Highlights:** Keyless access to buildings and gates, Hands-free door opening, Grant temporary guest access, Easy setup of access points, 1-month free trial

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

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is Oppen free?

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

### Which has better reviews, D or Oppen?

D is rated higher. D averages 4.7 out of 5 from 97 ratings, while Oppen averages 4.3 from 22 ratings.

### Do D or Oppen have ads?

Neither D nor Oppen shows ads.

### Which is updated more often, D or Oppen?

D ships an update every 3 weeks, and Oppen monthly. Most recently, D was updated on October 4, 2026 and Oppen on October 17, 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.*