Comparison

Brex vs Rhombus Key

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Brex

Manage corporate finances with integrated business accounts, corporate cards, and expense tracking. Streamline reimbursements, payments, and business travel all from a single platform.

Highlights
  • Corporate cards
  • Expense management
  • Reimbursements
  • Business accounts
  • Business travel booking
  • Global payments
  • 24/7 live support
Features
Read full description

Brex offers corporate cards, expense management, reimbursements, business accounts, and travel — all on one unified, global platform. The Brex mobile app gives you full, fast access to your Brex account and card. Use the app to make purchases, check spending limits and policies, submit expenses, request or approve reimbursements, send payments anywhere, and more. Download the free Brex app to: • Use your card without reaching for your wallet • Easily check what’s allowed per your expense policy • See any pending tasks at a glance in your inbox • Add missing receipts (many are added automatically!) • Book and manage business travel with global inventory • Send and receive ACH and wire payments anywhere • Store funds in an FDIC-insured business account • Schedule or cancel recurring or one-time payments • Reach live support 24/7 from anywhere Brex accounts also integrate with your existing tools, including QuickBooks, NetSuite, Workday, Coupa, Gusto, WhatsApp, and Slack, to help you streamline workflows and close the books faster Download the app or visit brex.com to get started.

About

Rhombus Key

Securely unlock doors directly from your smartphone. Replace physical keys and keycards with mobile credentials for fast, seamless building access. Manage multiple locations and favorite doors with a single login.

Highlights
  • Secure smartphone door unlocking
  • Mobile credentials for building access
  • Seamless waving to unlock
  • Favorite door navigation
  • Multi-location access
  • Centralized control via Rhombus Access Control
Read full description

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

Brex4 screens
Rhombus Key3 screens

Verdict

The call

The clearest difference is rating: Brex at 4.8 against Rhombus Key's 4.3. Brex also leads on ratings volume (8.8K vs 71) and update cadence (weekly vs every 3 weeks). Rhombus Key's advantage is review sentiment (74% vs 46%). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Brex holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Brex has 8.8K ratings behind it against 71, so its average is the more settled of the two. Written reviews complicate that: 46% of Brex'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.

UpkeepUpdate frequency

Brex ships an update weekly, Rhombus Key every 3 weeks. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 6 level
Brex versus Rhombus Key: the parameters behind the verdict, then further details
ParameterBrexRhombus Key
PriceFreeFree
Rating4.8 (8.8K ratings) — better4.3 (71 ratings)
Positive reviews45.7% of reviews74.1% of reviews — better
Number of ratings8.8K — better71
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS16.416.0 — better
Further details — not scored
Size143 MB20 MB
Age rating4+4+
DeveloperBrexRhombus Systems, Inc.

Customer experience

Brex

All ratings8,834 ratings
Positive96.2%
Neutral1.0%
Negative2.8%
Written reviews129 reviews
Positive45.7%
Neutral3.1%
Negative51.2%

Rhombus Key

All ratings71 ratings
Positive81.7%
Neutral0.0%
Negative18.3%
Written reviews27 reviews
Positive74.1%
Neutral0.0%
Negative25.9%

Bugs and requests

Brex

Reported bugs

4 issues
  • Check deposit issues
  • Incorrect transaction categorization
  • Unreliable account linking
  • Inconsistent app behavior

Requested features

4 requests
  • Ability to change flights directly in the app
  • Improved iPad support
  • Restore gold card in Apple Wallet
  • Searchable transaction history in the app

Rhombus Key

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Brex

No in-app purchases

None

Rhombus Key

No in-app purchases

Questions

Is Brex free?
Brex 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, Brex or Rhombus Key?
Brex is rated higher. Brex averages 4.8 out of 5 from 8.8K ratings, while Rhombus Key averages 4.3 from 71 ratings.
Do Brex or Rhombus Key have ads?
Neither Brex nor Rhombus Key shows ads.
Which is updated more often, Brex or Rhombus Key?
Brex ships an update weekly, and Rhombus Key every 3 weeks. Most recently, Brex was updated on September 25, 2026 and Rhombus Key on September 24, 2026.

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