Comparison

PosKing vs Rhombus POS

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

Head to head
About

PosKing

This comprehensive point-of-sale system offers cash register, inventory, and customer management features. It supports various business types, including retail, food service, and personal services, with options for peripheral integration and offline use.

Highlights
  • Cash register functionality
  • Inventory management
  • Customer relationship management
  • Offline operation
  • Employee management
  • Peripheral device support
Read full description

※ Feature List Cash Register, Table Ordering, Keep Accounts, Offline cash register, Reservation management, Customer management, Customer points system, Multiple accounts, Employee management, Employee schedule system, Inventory management, Coupon management, Receipt template editor, etc. ※ Supported Business Types Catering: Fast food restaurant, Coffee shop, Western cuisine restaurant, Japanese cuisine restaurant, France cuisine restaurant, Italian cuisine restaurant, Chinese cuisine restaurant, Thai cuisine restaurant, Asian cuisine restaurant, Grill restaurant, Teppanyaki restaurant, Noodle house, Bread shop, Baking shop, Milk tea shop, Drinks shop, Bar or Pub, Brewery pub. Retail: Convenience store, Food store, Candy, Fresh, Clothing & Bags, Beauty & Cosmetics, Pharmacy, 3C store, Phones store, Computers store, Baby products store, Furniture store, Household goods store, Watches store, Musical instruments store, Used, Collectible store, Automotive & Powersports, Office products store, Flowers store, Pets supplies store. Service: Barber, Beauty Salon, Nail Salon, Embroidery, Skin Care & Body Spa, Hospital, Clinic, Sports, Fitness Club, School, Training school, Housekeeping, Maintenance, Nightclub, Maid Cafe, Animal Cafe. ※ Peripheral Mode Customer display, Kitchen display system, Queue calling system, Take a number mode, etc. ※ Connectable Peripherals Receipt Printer, Label Printer, AirPrint Printer, Bluetooth barcode scanner, Bluetooth keypad, etc. ※ Supported thermal receipt printer manufacturers Epson, Star, Seiko Instruments (SII), Citizen, NEC, Bixolon, Partner, Sewoo, Woosim, Xprinter, Gprinter, etc. (We support almost all the thermal receipt printer, if the printer has a LAN or Bluetooth interface.) ※ Supported barcode scanner manufacturers Socket Mobile, Symcode, HPRT, etc. ※ Supported keypad manufacturers Satechi, etc. ※ About In-app subscriptions The App Store charges your specified payment method automatically on the same date each billing period. It requires you to cancel at least 24 hours before your subscription/trial period ends. Deleting the app from your device won’t cancel your subscription. To change or cancel subscriptions please go to the Settings app on your iOS device. ※ Terms of use and privacy policy https://posking.app/page/term Note: We stand with Ukraine and do not support the commodity barcodes from 4600000000008 to 4699999999998 which are used by Russia.

About

Rhombus POS

This free point-of-sale software offers flexible inventory management with unlimited items, categories, and user accounts. It supports various payment types, including split payments and tips, and provides essential business reports. Enhance functionality with optional add-ons for multiple locations and advanced reporting.

Highlights
  • Unlimited inventory items and categories
  • Unlimited user accounts with PIN protection
  • Multiple payment types and split payments
  • Email and text receipt options
  • X and Z business reports
  • Optional multi-location and advanced reporting
Features
Read full description

Download and use for FREE! See Overview Demonstration here. (https://www.youtube.com/watch?v=3biQr0zKzeo&t=22s) Rhombus POS Point of Sale App is a FREE software with flexible ways to set up your inventory in categories and sub categories. The ability to set up unlimited individual items allow options for add-ons and variations of the item. This ability to have unlimited items provides restaurants and retail stores with small inventories to stores with numerous items a flexible way to sell their merchandise. You are also able to have unlimited users on your account! The user/employee option allows for PIN protection of the users and are categorized as an administrator or employee. This allows protection of sensitive areas of your business with employees and access to areas needed as a manager. The payment Checkout functions allows for various types of payments and includes auto-split payments and splitting the payments in different amounts. There is also the ability for tips to be included and receipts to be sent by email or text. The app provides both X and Z Reports allowing you to keep track of your business performance. The advantages of the features are too numeral to mention here and can be seen in an overview video of the app here. (https://www.youtube.com/watch?v=3biQr0zKzeo&t=22s) In order to use the App with credit card and debit card payments an account with one of our preferred processors will need to be set up. The App Software is still free to use, but there will be very competitive transaction charges applied when using card payments. Click here to get further information. There is also the ability to enhance the app with other features including multiple locations, kitchen screen and extensive business reporting for an added cost.

Screenshots

PosKing4 screens
Rhombus POS2 screens

Verdict

The call

The clearest difference is review sentiment: Rhombus POS at 100% against PosKing's 56%. Rhombus POS also leads on rating (4.8 vs 3.1) and in-app purchases (none vs 6). PosKing's advantage is ratings volume (13 vs 4). On price, update cadence, ads and device support 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. PosKing sells 6 in-app purchases, starting at $20.00 per month. Rhombus POS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Rhombus POS holds the better App Store score, 4.8 against 3.1. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews point the same way: 56% of PosKing's written reviews are positive against 100% of Rhombus POS's.

UpkeepUpdate frequency

PosKing ships an update monthly, Rhombus POS every 2 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
PosKing versus Rhombus POS: the parameters behind the verdict, then further details
ParameterPosKingRhombus POS
PriceFreeFree
Rating3.1 (13 ratings)4.8 (4 ratings) — better
Positive reviews56.5% of reviews100.0% of reviews — better
Number of ratings13 — better4
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size53 MB153 MB
Age rating4+4+
DeveloperSoftAsiaRhombus POS, Inc.

Customer experience

PosKing

All ratings13 ratings
Positive46.2%
Neutral7.7%
Negative46.2%
Written reviews85 reviews
Positive56.5%
Neutral14.1%
Negative29.4%

Rhombus POS

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

PosKing

Subscriptions6
  • Basic Edition$20.001 Month
  • Standard Edition$45.001 Month
  • Premium Edition$90.001 Month
Show 3 more
  • Basic Edition (Yearly)$200.001 Year
  • Standard Edition (Yearly)$450.001 Year
  • Premium Edition (Yearly)$900.001 Year
None

Rhombus POS

No in-app purchases

Questions

Is PosKing free?
PosKing is free to download, with in-app purchases available.
Is Rhombus POS free?
Rhombus POS is free to download, with no in-app purchases.
Which has better reviews, PosKing or Rhombus POS?
Rhombus POS is rated higher. PosKing averages 3.1 out of 5 from 13 ratings, while Rhombus POS averages 4.8 from 4 ratings.
Do PosKing or Rhombus POS have ads?
Neither PosKing nor Rhombus POS shows ads.
Which is updated more often, PosKing or Rhombus POS?
PosKing ships an update monthly, and Rhombus POS every 2 months. Most recently, PosKing was updated on October 24, 2026 and Rhombus POS on October 11, 2026.

Other comparisons