# Nuki Smart Lock vs Erlengold

The clearest difference is ads: Nuki Smart Lock at none against Erlengold's shown. Nuki Smart Lock also leads on update cadence (every 3 weeks vs every 10 months). Erlengold's advantage is iOS requirement (13.0 vs 16.0). On price, 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.

Nuki Smart Lock ships an update every 3 weeks, Erlengold every 10 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Nuki Smart Lock | Erlengold |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (515 ratings)](https://appshunter.io/ios/app/nuki-smart-lock/id1044998081/reviews)** | — |
| Number of ratings | **515** | — |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Monetization | Free | — |
| Size | 298 MB | 35 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nuki Home Solutions GmbH](https://appshunter.io/developer/966180578) | [bonacasa AG](https://appshunter.io/developer/567389838) |

## What reviewers say

### Nuki Smart Lock

[App page](https://appshunter.io/ios/app/nuki-smart-lock/id1044998081)

Transform your smartphone into a secure digital key for your home. Grant and manage access for family and friends, and monitor who enters and when. Enjoy convenient features like automatic unlocking and locking, with easy DIY installation and smart home integration.

**Highlights:** Turn phone into a key, Share access permissions, Activity log, Auto Unlock/Lock, Night Mode, Smart Home integration, DIY installation

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🔒 Secure
- 👍 Convenient features
- 🔑 Works with existing locks
- ⚙️ Customizable settings

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 🔋 Battery life concerns
- 🕰️ Slow response times
- 🤔 Confusing UI/UX

**Reported bugs**

- Unreliable geofencing
- Inconsistent unlock/lock functionality
- Buggy app updates

**Requested features**

- Improved battery status monitoring
- Customizable auto-lock/unlock timers
- Stronger HomeKit/Alexa integration
- Ability to create/share access codes


### Erlengold

[App page](https://appshunter.io/ios/app/erlengold/id1447652389)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nuki Smart Lock free?

Nuki Smart Lock is free to download, with no in-app purchases.

### Is Erlengold free?

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

### Do Nuki Smart Lock or Erlengold have ads?

Erlengold shows ads; Nuki Smart Lock does not.

### Which is updated more often, Nuki Smart Lock or Erlengold?

Nuki Smart Lock ships an update every 3 weeks, and Erlengold every 10 months. Most recently, Nuki Smart Lock was updated on October 26, 2026 and Erlengold on October 26, 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.*