# Nuki Smart Lock vs DiO one

The clearest difference is rating: Nuki Smart Lock at 4.7 against DiO one's 4.1. Nuki Smart Lock also leads on review sentiment (90% vs 61%) and ratings volume (516 vs 25). On price, ads, in-app purchases and monetization model 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 holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Nuki Smart Lock has 516 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 90% of Nuki Smart Lock's written reviews are positive against 61% of DiO one's.

Nuki Smart Lock ships an update every 3 weeks, DiO one every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Nuki Smart Lock | DiO one |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (516 ratings)](https://appshunter.io/ios/app/nuki-smart-lock/id1044998081/reviews)** | [4.1 (25 ratings)](https://appshunter.io/ios/app/dio-one/id1493503504/reviews) |
| Number of ratings | **516** | 25 |
| Positive reviews | **90.2% of reviews** | 61.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 298 MB | 208 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nuki Home Solutions GmbH](https://appshunter.io/developer/966180578) | [Chacon](https://appshunter.io/developer/889045155) |

## 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


### DiO one

[App page](https://appshunter.io/ios/app/dio-one/id1493503504)

Control your smart home devices remotely with this app. Turn lights and appliances on or off, automate schedules, and simulate presence for security. Optimize energy usage and manage your connected home from anywhere.

**Highlights:** Remote control of connected devices, Presence simulation, Scheduling and automation, Energy saving optimization, Control from anywhere

**Features:** Apple Wallet

**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 DiO one free?

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

### Which has better reviews, Nuki Smart Lock or DiO one?

Nuki Smart Lock is rated higher. Nuki Smart Lock averages 4.7 out of 5 from 516 ratings, while DiO one averages 4.1 from 25 ratings.

### Do Nuki Smart Lock or DiO one have ads?

Neither Nuki Smart Lock nor DiO one shows ads.

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

Nuki Smart Lock ships an update every 3 weeks, and DiO one every 2 months. Most recently, Nuki Smart Lock was updated on October 29, 2026 and DiO one on October 24, 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.*