How to Integrate Payment System Into the Existing App

Today we use mobile devices, not only for sending messages or receiving calls but also for ordering products or services and paying for them. Statista report that by 2022, the transaction value of mobile payment apps will reach nearly $14 trillion, illustrating the fast-paced industry. Whether you want to build a booking, event, or even an e-commerce app to process transactions you will need a mobile app payment gateway. 

In this article, we will guide you through different payment gateway providers currently existing on the market, and explain how to integrate a payment gateway into your app via SDK. 

But first of all, let’s see how the mobile app payment gateway works.


How do mobile app payments work?

When you buy a new pair of sneakers or order pizza, either the app or website gives you the option to conduct an online payment via a built-in payment gateway. To achieve that, you need to fill in several fields with your cart information. Then, the mobile app payment processing goes like this: 

  • You send your card information to the payment gateway
  • The payment gateway sends the information to the bank that issued your card
  • The bank sends the request to your payment system (MasterCard, VISA, etc.)
  • The payment system analyses your reputation and analyzes the term of money transaction
  • Your bank sends an authorization code that approves the payment system to complete the payment 
  • Then, the code is sent to the payment gateway and, if the bank approves the transaction, money is sent to the seller’s bank account
in app mobile payment gateway

[In-app payments process]

All these stages take only a few seconds if the Internet connection is good. Now you can imagine what is going on when you pay for your orders online. At the same time, you also see a clear picture of how important payment gateway security is. Every second, a massive amount of money and payment information go through payment gateways. To protect personal data from breaches, most payment systems use an HTTPS secure protocol, the IP address verification mechanisms, and even the request signature. 


To empower your app with payment gateways, you can choose among several options, explained below. 

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In-app payment systems

There are two ways your app can conduct online payments, depending on the type of goods you are selling:

Use App Store Methods for virtual goods

If you want to sell subscriptions, additional features, or premium accounts, empower your app with specialized In-App Billing API for iOS and Android. Both Apple and Google take 30% from each transaction made within your mobile app and prohibit the use of any third-party payment gateways. By using In-App Billing API, you enable users to pay in-app with their AppStore or Google Play via Apple or Gmail accounts.  


Use the Payment Gateway for physical goods

When you are selling products and services outside the app, both Apple and Google recommend using third-party mobile payment gateway providers. You can integrate SDK as one of the existing in-app payment solutions to your app that will conduct all transactions with banks, secure customer data, and be responsible for payment transactions. 

Choosing A Mobile App Payment Solution Provider

Below we have gathered the top three most popular payment processors that provide SDK for mobile app integration. All of these providers take care of data and money transfers, saving you from unnecessary headaches. Now, let’s take a look at them in more detail. 




Payment methods 

Developers can use the PayPal mobile SDK to process:

  • Visa
  • Mastercard 
  • American Express 
  • JCB 
  • Maestro 
  • Discover 

Braintree accepts: 

  • Visa
  • Mastercard
  • American Express 
  • Apple Pay 
  • Android Pay 
  • MasterPass
  • PayPal 
  • Bitcoin

Stripe accepts: 

  • Visa 
  • Mastercard 
  • American Express 
  • JCB, Maestro
  • Apple Pay 
  • Android Pay 
  • AliPay (a Chinese platform)

Transaction fees

Rate: pay a competitive rate of 2.9% + $0.30 per U.S. 

Monthly fees: no fees or $30 in case PayPal Payments Pro package

Currency conversion fees: varies from 0.4% to 3.3%.

Rate: 2.9% + 30 cents per successful charge. No fees for the first $50,000 processed

Monthly fees: none

Setup fees: none

Currency conversion fee: 2%

Rate: 2.9% + 30 cents per successful charge

Monthly fees: none

Setup fees: none

Currency conversion fee: 2%



If you need a simple yet effective solution, choose PayPal. At the same time, if you want to personalize the design of your payment gateway, so it matches your website or app identity, use Stripe or Braintree.

After choosing the most suitable payment gateway provider, let’s move to the next stage. 

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Using SDK for integrating payment gateways in the app

Each payment provider has its own software development kit (SDK), as well as detailed documentation on integrating payment gateway in your mobile app. As we have said, the main benefit of using the SDK of an existing payment gateway is that they take control of the security and operations carried out during transactions. In this way, the use of payment gateway libraries rid you of buying a PCI certificate. 

While the integration details may vary depending on the platform and dev tools, the scheme remains the same. Thus, let us take Braintree as an example and see how to integrate this gateway into an iOS mobile app. 



Step 1. Set up the client to call your server

In this step, you set up your client to call your server. To achieve that, you need to: 

  • Download and install the SDK of the Braintree payment gateway. You can find it on the link
  • Add your credentials. Set up the client option to call your server to fetch the Braintree client tokens
  • Set up your client. Follow the Braintree documentation to set up your client for iOS SDK
  • Call your server to process the payment

Step 2. Set up your server to call the Braintree SDK

During this step, you set up your server to call the Braintree SDK to set up and execute the payment:

Initialize the Braintree SDK:

  • Import the Braintree SDK module
  • Set up a gateway using your Braintree access token
  • Set up a URL to return a client token to the browser


Set up the payment:

  • Set up a URL to handle requests from the client
  • Get the nonce from the request body
  • Set up the parameters to execute the payment, including the nonce 
  • Call the Braintree gateway to execute the payment
  • Return a successful response to the client

If you are not a tech person and you need to integrate a payment gateway, we recommend hiring mobile app developers.

Final Thoughts

The payment gateway is essential for all commercial mobile apps. To empower your app with this feature, use the SDK of existing payment gateways, such as PayPal, Braintree, or Stripe. You can integrate the SDK on your own or hire a development team that will do all the integrations and settings for you. 

Epic Vs. Cerner: Which EHR System is Right for Your Healthcare Practice?

Data management has become important to delivering optimum healthcare. The need to properly collate and utilize this data has led to higher adoption of Electronic Health Records management systems. As of 2021, about 78% of office-based doctors use a certified EHR system. At the same time, the adoption rate for non-federal acute care hospitals is put at 96%.

Electronic Health Records have contributed to making the healthcare industry more streamlined and improving the workflow of healthcare professionals.

Two of the most prominent EHR Vendors, Epic EHR and Cerner EHR, have brought innovative features to boost healthcare delivery and provide mobile access to patients to monitor their health and reach out to doctors remotely.

While our article discusses the pros and cons of the Epic EHR vs. Cerner electronic health record battle and examines key indices, we encourage you to reach out to us to explore the development of a custom EHR system that caters to your healthcare practice’s unique needs. 

epic cerner

As a healthcare software development company, we are dedicated to helping you not only select the best option for your healthcare organization but also make your dreams a reality.  Contact us today to take the next step towards revolutionizing your healthcare practice.

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Why is Epic the Best EMR for Healthcare Providers?

Hospitals worldwide use different EHRs to streamline workflow and provide better health services for patients. Epic is the best-known EHR available today.

Over the years, Epic has consistently ranked top among EHR providers for healthcare organizations. About 253 million US patients have their health records on Epic’s database.

Epic’s comprehensive offering and suitability for larger healthcare facilities have put it ahead of its competitors. Before highlighting Epic EMR’s edge over others, particularly Cerner, let’s provide some background to the software.

What is Epic Software?

Epic EHR is a cloud-hosted software built to help healthcare systems, hospitals, and other medical-related practices to collect and manage patient health information. Epic takes paper-based health data and makes it available on a secured website. Since its introduction in 1978, the vendor has focused on patient engagement through a patient portal and simplifying remote healthcare consultation. The patient can access their information through a mobile app available on Android and IOS platforms.

epic cerner

The Epic EHR is suitable for all kinds of health practices, although it is more common with larger practices. Epic features include online prescription refills, a patient portal, medical templates, doctor schedules, billing information, referrals, analytics, and revenue cycle management.

Epic EHR supports specialties from allergy and immunology, general practice, oncology, ophthalmology, radiology, and urology, among other practices. All these features make Epic a favorite EHR system among most healthcare providers.

Which is Cheaper for Healthcare Organizations, Epic or Cerner?

Unfortunately, there needs to be clearer and more detailed information regarding pricing on the website of the two EHR providers. This lack of pricing information makes comparison difficult. A client would have to communicate with the firms to find out the exact cost of implementation. However, various online estimates put the price of Epic implementation in the range of $1,200 to $500,000.

epic cheaper than cerner

In contrast, Cerner’s cost is a monthly $25 per user. These costs are not set in stone and vary based on the project size, the cost of personnel to set up the project, etc.

The bottom line is that Cerner is the cheaper option.

What Are the Disadvantages of Epic?

As great as Epic is, there are drawbacks to the system, which is a source of constant complaints by medical professionals. The two most common disadvantages are lack of Interoperability and the high cost of implementation. Let’s break them down for you.

Lack of Interoperability

Epic has stubbornly refused to allow its system to share data with other systems. For Epic to share data, it must be with another Epic system. This restriction is seen in the digital health world as archaic and against the digitization of health records. Epic even charged fees to transmit data with a non-Epic system.

It has improved its data-sharing features by introducing some interoperability protocols; however, it is still considered restricted, unlike other EHR Vendors.

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High Cost of Implementation

Buying the software outright for your healthcare facility will cost you significantly. The Epic system is notorious for being too expensive. Little wonder it is used mostly by large healthcare systems. The time needed to implement the system also adds to the costs. During implementation, there are many disruptions to the system, and you have to spend a lot of time training staff to use it.

Other disadvantages are a need for clearer pricing, frequent downtimes, and being out of reach for small practices.

Cerner vs. Epic: Which EHR Vendor Tops the Chart?

Cerner and Epic software solutions are consistently regarded as the top two EHR Vendors in the world. Epic systems held 36.92% of the market share to rank as number one, while Cerner came in at 22.59% to be second. As the leading EHR vendor, they have revolutionized record keeping and data management in the healthcare sector.

Cerner EHR is a platform to digitize health information and manage all patients’ medical data. It is more suited for ambulatory and clinical care. In contrast, Epic is more favored by large organizations. Johns Hopkins and Mayo Clinic are some of the clients of Epic.

The different solutions for the Cerner system include CareAware, Cerner Millennium, Health Network, and Open Developer Experience. All these solutions combine to deliver an enjoyable experience for patients and doctors alike.

Implementing Cerner and Epic by health systems results in streamlined workflow and better healthcare delivery.

The Ultimate Comparison: Epic vs. Cerner EHR – Pros And Cons 

Deciding which of the top EHR vendors to go for requires understanding what makes each of them great and why you should avoid them. Let’s see how the Cerner vs. Epic battle stacks up regarding Pros and Cons.

Advantages and Disadvantages of Cerner

Here are some of Cerner’s upsides

  • Cerner EMR is interoperable with other third-party systems, aiding the quick flow of data between systems
  • The system is reliable due to its stability and provides users with relevant integration
  • The cost of implementation and maintenance of Cerner is cheaper, making it ideal for smaller practices
  • Cerner has a patient portal featuring prescriptions, refill information, billing information, doctors’ appointments, etc.
  • Cerner is highly customizable and easy to use

What about the downsides?

  • Learning the Cerner EHR system is complicated, and its constantly evolving nature makes it time-consuming for healthcare practitioners to master
  • Cerner EHR doesn’t have as much integration as Epic

Benefits and Challenges of Using Epic

Merits of the Epic software include:

  • Comprehensive features like telemedicine and patient portals improve the organization’s workflow
  • Epic EHR uses AI and business analytics, which helps hospitals to make decisions based on data collected
  • Epic simplifies remote consultation by allowing patients to schedule physician appointments
  • It has a clean and simple user interface
  • Epic has great CRM features for healthcare providers

But there are also some demerits.

  • Interoperability with other EHRs is still restrictive despite making some improvements recently
  • The prohibitive cost of implementation
  • Only a handful of IT professionals, mainly from Epic’s in-house team, can set up the system

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Differences between Epic EHR vs. Cerner EHR Features


Epic EHR 

Cerner EHR 


Costly to implement due to the use of Epic IT staff

Less expensive to implement 


Restricted interoperability 

More open with CommonWell Health Alliance 


Costs about $1,200 to $500,000 

About $25 per user per month

Size of institution 

Large practices with more than 50 beds

Small to medium-sized facilities with less than 50 beds

Real-time data 

Lacks the ability to provide real-time data 

Optimized to provide real-time health data


Uses MyChart to connect patients in remote locations to doctors

Uses Virtual Health Care platform for telemedicine 

Mobile Capabilities 

Has mobile apps for tablets, Phones, and smartwatches 

Supports mobile applications with the Powerchart Touch platform 

Regulatory Compliance 

Uses encryption for data sharing

Open interoperability makes it HIPAA compliant 

Several features highlight the differences between Epic and Cerner EHR. Let’s see how the Epic vs. Cerner comparison battle plays out.


Epic is considerably more expensive to install than Cerner. Among EHR providers, Epic installation costs can rise to $500,000 for a single facility making it the most expensive EHR system. One major factor in Epic’s installation cost is the use of its in-house technical team and the lack of independent installers versed in the Epic system.

Cerner, on the other hand, is relatively cheaper. Its cheaper costs make it ideal for small to medium-sized health practices. In addition, Cerner offers training to health records administrators on how to use the system, thereby lessening the implementation period. However, Cerner’s constantly changing features make it hard to keep up.


Over the years, Epic has improved its interoperability features after major criticisms by healthcare providers. Epic has introduced several platforms like EpicCare Link, Carequality Network, and Happy Together to boost information sharing with other EHR systems. Despite these strides, Epic’s system still needs to be more open to sharing data with other EHRs.

On the other hand, Cerner encourages more interoperability by creating the CommonWell Health Alliance, a network for multiple EHR systems to connect and seamlessly share data using APIs. Epic has refused to join the CommonWell Alliance and allows direct protocols for interoperability.


A look through Epic and Cerner’s websites does not reveal the software’s price. However, Epic is believed to be more expensive, and pricing is between $1200 to $500,000; meanwhile, Cerner’s pricing is as cheap as $25 per user every month. In truth, Epic charges a lot. On the positive side, it offers great value for your investment with better features.

Size of institution

The Epic vs. Cerner comparison is evident in the kind of facilities that use them. Due to the higher installation cost, larger institutions mostly use Epic. Cerner’s cheap costs make it suitable for small healthcare practices of between 10 to 25 beds.

Real-time data

Epic cannot provide real-time data for patient monitoring. While Cerner does well with giving patients real-time information on their health status to their physicians.

telehealth epic integration


Both vendors have telehealth features that gained more prominence during the Covid-19 lockdowns. Cerner uses Virtual Health Care to link patients in rural areas to doctors in their offices. Cerner also has the HealthLife platform, which helps patients monitor their health records and communicate securely with healthcare providers.

Epic provides patients and doctors access to digital consultations and real-time health monitoring. Patients can use the MyChart platform to schedule virtual appointments and report symptoms or changes in their health status.

Mobile Capabilities

The two vendors allow users (patients and healthcare professionals) to access health records on mobile devices. Epic mobile applications include Canto, Haiku, and Limerick for tablets, phones, and smartwatch platforms. Cerner has the Powerchart Touch mobile application for all devices to monitor electronic health records.

Regulatory Compliance

Cerner’s more advanced interoperability ensures that the system is HIPAA compliant, which guarantees the confidentiality of patient health data.

Epic’s limited interoperability, on the other means it doesn’t share data with other non-Epic systems. To protect patient data, it employs data encryption for patients to send and access their data on the system.


The Epic EHR vs. Cerner EHR rivalry remains a contested battle. Each of them has an advantage over the other in different ways. While Epic appears to be more expensive, it offers good value for money, depending on the type of project you want to build.

If you are still trying to decide which vendors to go for, you don’t have to worry about it. The APP Solutions is experienced in designing efficient healthcare information services. We can help you choose the most suitable option that aligns with your business goals.

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