Kisi vs Rhombus Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kisi
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.
- 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
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Kisi is a cloud-based door access control and security solution. UNLOCK DOORS WITH YOUR PHONE With the Kisi app, you can use your iPhone to quickly and securely unlock any door equipped with Kisi. - See the list of the doors you have access to and unlock them from the app - Tap-to-unlock*: open a door by holding your iPhone up to a Kisi Reader - MotionSense*: wave your hand in front of the reader to unlock the door without taking your phone out of the bag (only supported by the MotionSense-enabled doors) - One single key for any door in any building * require bluetooth permissions. Some doors might require access to your location to be unlocked. MANAGE ACCESS TO ANYONE WITH ONE TOUCH As a Kisi admin, you can use the Kisi app to quickly and securely manage access to your facilities. - Grant or revoke access to anyone with one touch - Send access links to temporary staff and visitors - See user activity at a given place for a given date - Set scheduled unlocks - Receive relevant security-related notifications
Rhombus Key
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.
- 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
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Wave Hello to Rhombus Key – to securely unlock doors straight from your Smartphone. Say goodbye to physical keys, keycards, and badges by using Rhombus Key for: - Fast and secure building access with mobile credentials. - Seamless badging by simply waving to unlock or by using your phone. - Quick navigation to your most-used doors by saving your favorites. - Multi-location access across all your doors with one login. This app is compatible with Rhombus Access Control – a modern approach to building management with centralized visibility and control, seamless remote access, and unlimited scalability.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 October 31, 2026 and October 30, 2026 respectively.
| Parameter | Kisi | Rhombus Key |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (25K ratings) — better | 4.3 (72 ratings) |
| Positive reviews | 44.7% of reviews | 74.1% of reviews — better |
| Number of ratings | 25K — better | 72 |
| Update frequency | Every 10 days — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #171 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | KISI Incorporated | Rhombus Systems, Inc. |
Customer experience
Kisi
Rhombus Key
Bugs and requests
Kisi
Reported bugs
4 issues- Constant crashes and login issues
- Bluetooth and location permission problems
- Doors not unlocking properly
- App not working on older devices
Requested features
4 requests- Ability to sort and favorite doors
- Offline door unlocking capability
- Widget support for quick access
- Admin features to manage users and permissions
Rhombus Key
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Kisi
No in-app purchases
Rhombus Key
No in-app purchases
