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 app consolidates all your travel plans and documents, offering real-time updates for flights and other travel arrangements. It provides 24/7 support and allows for easy booking, modification, and cancellation of trips on the go.

Highlights
  • Real-time travel updates
  • Consolidated travel plans and documents
  • 24/7 customer support
  • Flexible booking options
  • In-app booking and modifications
  • Travel request approvals
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 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

Perk4 screens
Rhombus Key3 screens

Verdict

The call

The clearest difference is review sentiment: Rhombus Key at 74% against Perk's 27%. Perk's advantage is rating (4.7 vs 4.3) and update cadence (weekly vs every 3 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 4.3. That said, the two scores are not equally well evidenced: Perk has 1.2K ratings behind it against 71, 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 3 weeks. The most recent releases landed on October 18, 2026 and October 20, 2026 respectively.

Scorecard4 real differences · 6 level
Perk versus Rhombus Key: the parameters behind the verdict, then further details
ParameterPerkRhombus Key
PriceFreeFree
Rating4.7 (1.2K ratings) — better4.3 (71 ratings)
Positive reviews27.1% of reviews74.1% of reviews — better
Number of ratings1.2K — better71
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS17.016.0 — better
Further details — not scored
Size225 MB20 MB
Age rating4+4+
DeveloperPerk Platform SLRhombus Systems, Inc.

Customer experience

Perk

All ratings1,187 ratings
Positive93.5%
Neutral1.5%
Negative5.0%
Written reviews188 reviews
Positive27.1%
Neutral5.9%
Negative67.0%

Rhombus Key

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

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

Not enough reviews yet to summarise bugs or requests.

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 4.3 from 71 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 3 weeks. Most recently, Perk was updated on October 18, 2026 and Rhombus Key on October 20, 2026.

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