Best Merchant Authorization Apps

249+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated September 2026

With an average user rating of 4.4★, the merchant authorization category is one of the App Store's strongest. Browse all 249+ apps we track, sorted so the most loved ones surface first.

Compare top Merchant Authorization Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Square Point of Sale (POS)Square Point of Sale (POS)Free4.8★ (604K)NoNoSep 2026
2CardValetCardValetFree4.6★ (19K)NoNoSep 2026
3CitiManager – Corporate CardsCitiManager – Corporate CardsFree4.9★ (18K)NoNoSep 2026
4Merchant.appMerchant.appFree5.0★ (6)NoNoJul 2026
5Gravity Payments mPOSGravity Payments mPOSFree5.0★ (3)NoNoMay 2026
6Robinhood BankingRobinhood BankingFree4.9★ (93K)NoNoSep 2026
7Bread FinancialBread FinancialFree4.8★ (165K)NoNoSep 2026
8IBC Card ControlsIBC Card ControlsFree2.5★ (151)NoNoSep 2026

Top Picks for Merchant Authorization

Square Point of Sale (POS)#1

Square Point of Sale (POS) by Block, Inc.

Payments & Business Dashboard
Editor's Choice
💼 Business
4.8😐(604K ratings)
Free
#18in Business
Square Point of Sale (POS) screenshot 1
Square Point of Sale (POS) screenshot 2
Square Point of Sale (POS) screenshot 3
Square Point of Sale (POS) screenshot 4
Square Point of Sale (POS) screenshot 5
Square Point of Sale (POS) screenshot 6

This all-in-one payments processing app helps businesses of all types manage operations, accept payments, and boost profits. It offers industry-specific modes for retail, restaurants, services, and beauty businesses, with features like inventory management, online booking, and invoicing.

What We Love

  • 👍 Convenient and easy to use
  • 🚀 Quick transactions and payouts
  • 💡 Useful reporting and inventory management features
  • 👍 Professional and sleek hardware design

Room to Improve

  • 🐛 Connectivity issues with card readers
  • 🔒 Concerns over account deactivation and fund holds
  • 🤖 Poor customer service and lack of live support
  • ⏱️ Slow fund transfers and delays in payouts
CardValet#2
4.6😐(19K ratings)
Free
CardValet screenshot 1
CardValet screenshot 2
CardValet screenshot 3
CardValet screenshot 4
CardValet screenshot 5

Take full control of your debit and credit cards with instant on/off toggles, spending limits, and location-based restrictions. Receive real-time alerts for all transactions, monitor purchases, and manage your cards digitally from your smartphone.

What We Love

  • 🚀 Real-time transaction alerts
  • 🔒 Ability to lock/unlock card
  • 💡 Customizable spending limits
  • 👍 Convenient card management

Room to Improve

  • 🐛 Frequent login issues
  • 🐛 Unreliable connectivity
  • 🐛 Disappearing transaction history
  • 👎 Reduced functionality after updates
CitiManager – Corporate Cards#3

CitiManager – Corporate Cards by Citibank, N.A.

For corporate card users only
Worth Considering
💰 Finance
4.9😞(18K ratings)
Free
CitiManager – Corporate Cards screenshot 1
CitiManager – Corporate Cards screenshot 2
CitiManager – Corporate Cards screenshot 3
CitiManager – Corporate Cards screenshot 4
CitiManager – Corporate Cards screenshot 5

Manage your corporate credit card account on the go. View statements, balances, credit limits, and recent transactions. Enhanced security features like biometric authentication and one-time passwords are included for convenient and secure access to your account information.

What We Love

  • 👍 Simple and easy to use
  • 🚀 Straight-forward design
  • 💡 Useful for checking balance and recent activity

Room to Improve

  • 🐛 Frequent login issues and app crashes
  • 🔒 Weak biometric and password management support
  • ⚠️ Limited functionality compared to website
  • ⏱️ Slow transaction processing and balance updates
  • 🤖 Poor integration with iOS features and password managers

More Merchant Authorization apps to explore

FAQ about Merchant Authorization

What are the best merchant authorization apps for iPhone?
Square Point of Sale (POS) tops our merchant authorization apps ranking as of September 2026, with a 4.8-star average from 604K App Store ratings, and it's free to download.
Yes — 20 of the top merchant authorization apps we rank are free to download, including Square Point of Sale (POS) and CardValet.
Square Point of Sale (POS) has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 249+ merchant authorization apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Square Point of Sale is an all-in-one payments processing app designed to help businesses manage operations, accept various payment methods, and improve profitability. It offers tailored features for different industries like retail, restaurants, services, and beauty.
Key features include accepting payments in person, online, or over the phone with major credit cards, debit cards, digital wallets, and more. It also provides industry-specific modes with functionalities like inventory management, online booking, invoicing, and real-time business reports.