# Kisi vs Rhombus Key

The clearest difference is rating: Kisi at 4.7 against Rhombus Key's 4.3. Kisi also leads on ratings volume (25K vs 72) and update cadence (every 10 days vs every 4 weeks). Rhombus Key's advantage is review sentiment (74% vs 45%). 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.

Kisi holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Kisi has 25K ratings behind it against 72, so its average is the more settled of the two. Written reviews complicate that: 45% of Kisi's written reviews are positive against 74% of Rhombus Key's, so the app with the better star average is not the one people write more warmly about.

Kisi ships an update every 10 days, Rhombus Key every 4 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Kisi | Rhombus Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (25K ratings)](https://appshunter.io/ios/app/kisi/id687291321/reviews)** | [4.3 (72 ratings)](https://appshunter.io/ios/app/rhombus-key/id1669560104/reviews) |
| Number of ratings | **25K** | 72 |
| Positive reviews | 44.7% of reviews | **74.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Monetization | Free | Free |
| Best chart rank | **#169** | — |
| Size | 37 MB | 20 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KISI Incorporated](https://appshunter.io/developer/687291324) | [Rhombus Systems, Inc.](https://appshunter.io/developer/1237841962) |

## What reviewers say

### Kisi

[App page](https://appshunter.io/ios/app/kisi/id687291321)

**Currently charting:** #169 Top Free · Business (US App Store)

This app allows you to unlock doors using your smartphone. It provides secure access control for buildings and facilities, enabling you to manage who enters and when. You can also grant and revoke access remotely.

**Highlights:** Unlock doors with your phone, Tap-to-unlock functionality, MotionSense for hands-free unlocking, Manage access for users, Grant and revoke access remotely, View user activity logs, Schedule door unlocks

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient and seamless door entry
- 🔒 Secure access control
- 👍 Easy to use
- 🚀 Fast and reliable performance

**What reviewers complain about**

- 🐛 Inconsistent and unreliable app performance
- 🔒 Overly aggressive location permissions
- 🔋 High battery drain
- ⚠️ Missing important features like Apple Watch support

**Reported bugs**

- Constant crashes and login issues
- Bluetooth and location permission problems
- Doors not unlocking properly
- App not working on older devices

**Requested features**

- Ability to sort and favorite doors
- Offline door unlocking capability
- Widget support for quick access
- Admin features to manage users and permissions


### Rhombus Key

[App page](https://appshunter.io/ios/app/rhombus-key/id1669560104)

Securely unlock doors using your smartphone, eliminating the need for physical keys or keycards. This app offers fast building access, seamless badging, and the ability to save favorite doors for quick navigation. It supports multi-location access with a single login.

**Highlights:** Secure mobile credentials for building access, Fast and seamless badging, Save favorite doors for quick access, Multi-location access with one login, Compatible with Rhombus Access Control

**In-app purchases:** none


## Frequently asked questions

### Is Kisi free?

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

### Is Rhombus Key free?

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

### Which has better reviews, Kisi or Rhombus Key?

Kisi is rated higher. Kisi averages 4.7 out of 5 from 25K ratings, while Rhombus Key averages 4.3 from 72 ratings.

### Do Kisi or Rhombus Key have ads?

Neither Kisi nor Rhombus Key shows ads.

### Which is updated more often, Kisi or Rhombus Key?

Kisi ships an update every 10 days, and Rhombus Key every 4 weeks. Most recently, Kisi was updated on November 1, 2026 and Rhombus Key on October 30, 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.*