Comparison

Perk 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

Perk

This intelligent app simplifies business travel and expense management. Plan, book, and manage trips with real-time updates and 24/7 support. Automate your expenses with AI-powered processing and mobile spend cards.

Highlights
  • Book, modify, and cancel trips
  • Centralized travel details
  • Approve team travel requests
  • Real-time travel updates
  • Automated expense processing
  • Mobile spend cards
  • Automated receipt matching
Features
Read full description

We’re Perk. If you travel for work, this app is for you. Welcome to the intelligent app for travel and spend that allows anyone travelling for work to plan, book, and expense with ease. When you’re travelling, Perk gives you: a global inventory to book and manage trips in just a few clicks. Travel features customers love: • Flexibility with the ability to book, modify, or cancel bookings • All your travel details and documents in one place • As a travel manager, receive and approve travel requests from your team on-the-go. • Updates in real time - from flight status to travel disruption • 24/7 support if something goes wrong or needs to change • All within company-set policies - for instant approval and no overspend surprises When you need to spend, Perk gives you: an AI-powered automation which streamlines the entire expense process. Spend features customers love: • Automated Expense Processing • Mobile Compatible Perk Spend Cards • Automated Receipt Matching • Administration Controls & Expense Reminders to Travelers

About

Rhombus Key

Securely unlock doors using your smartphone, eliminating the need for physical keys or badges. Enjoy fast, seamless access to buildings and manage multiple locations with a single login. Save your favorite doors for quick navigation.

Highlights
  • Secure mobile credentials for building access
  • Wave to unlock functionality
  • Save favorite doors for quick access
  • Multi-location access with one login
  • Centralized visibility and control
  • Seamless remote access
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

Perk4 screens
Rhombus Key3 screens

Verdict

The call

The clearest difference is review sentiment: Rhombus Key at 74% against Perk's 27%. Rhombus Key also leads on iOS requirement (16.0 vs 18.0). Perk's advantage is rating (4.7 vs 4.2) and update cadence (weekly vs every 4 weeks). 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

Perk holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Perk has 1.2K ratings behind it against 73, so its average is the more settled of the two. Written reviews complicate that: 27% of Perk'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

Perk ships an update weekly, Rhombus Key every 4 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
Perk versus Rhombus Key: the parameters behind the verdict, then further details
ParameterPerkRhombus Key
PriceFreeFree
Rating4.7 (1.2K ratings) — better4.2 (73 ratings)
Positive reviews26.9% of reviews74.1% of reviews — better
Number of ratings1.2K — better73
Update frequencyWeekly — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS18.016.0 — better
Further details — not scored
Size236 MB22 MB
Age rating4+4+
DeveloperPerk Platform SLRhombus Systems, Inc.

Customer experience

Perk

All ratings1,187 ratings
Positive93.5%
Neutral1.5%
Negative5.0%
Written reviews193 reviews
Positive26.9%
Neutral6.2%
Negative66.8%

Rhombus Key

All ratings73 ratings
Positive79.5%
Neutral0.0%
Negative20.5%
Written reviews27 reviews
Positive74.1%
Neutral0.0%
Negative25.9%

User reviews

Perk

From 1.2K App Store ratings

What we love

  • ⭐ Amazing company and app
  • 🚀 Great discounts and service
  • 💻 Makes booking travel less stressful
  • ⏱️ Time-saving app
  • 📱 Best mobile app for corporate travel

Room to improve

  • 🐛 Buggy, crashes, and not functional
  • 💰 Expensive, overcharges, and doesn't include all costs
  • 🕰️ Slow, laggy, and keeps loading
  • 🤖 Requires Microsoft Edge, can't log in
  • 🤦‍♂️ Cumbersome, loses rewards points, and unreliable

Rhombus Key

From 73 App Store ratings

What we love

  • 👍 Easy to use
  • 🪄 Wave to unlock feature
  • 🚀 Fast and reliable
  • 💡 Innovative features (wave to unlock)
  • 📱 Mobile unlock convenient

Room to improve

  • 🔋 Drains battery life
  • 🐛 Constantly bugs about location
  • 🐛 Buggy with non-admin accounts
  • 🔒 Requires location always
  • 🔒 Requires Bluetooth access

Bugs and requests

Perk

Reported bugs

4 issues
  • Login issues, can't create account
  • Booking issues, flights not available after reservation
  • Notifications and communication problems with hotels
  • App crashes and doesn't load properly after updates

Requested features

2 requests
  • Make it more difficult to cancel non-refundable flights
  • Add ability to store tickets in Apple Wallet

Rhombus Key

Reported bugs

7 issues
  • App constantly bugs about having location on at all times
  • Issues with giving access to non-admin accounts
  • System will work working randomly
  • App neither sends the magic code to login nor has a password reset feature
  • Unable to activate account or log in
Show 2 more
  • Barely works and destroys battery
  • App checks location ALWAYS

Requested features

3 requests
  • Allow app to work with location settings set to While using the app
  • Improve basic features and user experience
  • Fix login and password reset issues

In-app purchases

None

Perk

No in-app purchases

None

Rhombus Key

No in-app purchases

Questions

Is Perk free?
Perk 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, Perk or Rhombus Key?
Perk is rated higher. Perk averages 4.7 out of 5 from 1.2K ratings, while Rhombus Key averages 4.2 from 73 ratings.
Do Perk or Rhombus Key have ads?
Neither Perk nor Rhombus Key shows ads.
Which is updated more often, Perk or Rhombus Key?
Perk ships an update weekly, and Rhombus Key every 4 weeks. Most recently, Perk was updated on November 6, 2026 and Rhombus Key on November 7, 2026.

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