Originally published May 31st, 2018, updated January 13th, 2019.

From news channels to social media platforms and the office group discussions, blockchain has remained the hottest topic for past some years now. And still, there’s no sign that the noise around the blockchain and cryptocurrencies is going to die down anytime soon.

With lots of fans and critics, blockchain and blockchain app development are growing in popularity to unimaginable heights. It is becoming the buzzword where even a company changing its name and business model according to the blockchain hype is leading to higher profits.

Have any doubt? A UK based organization, On-Line PLC gained a significant traffic, higher proposals from investors and share price surge by 394% by just changing its name to On-Line Blockchain PLC.

Difficult to digest? Have a look at these statistics then,

1. In 2017, the blockchain market was about $339.5 billion in size whereas it is forecasted to cross $2.3 billion by 2021.
2. According to IDC, the global spending on blockchain development will be $2.1 billion in 2018. And this significant value will be entertained by the growing interest of enterprises in the blockchain, resulting in a huge leap from Proof-of-Concept projects to blockchain solutions.
3. As the blockchain innovation leader, the US alone will spend 40% of the global blockchain spending, especially in the financial and manufacturing arena.
4. There will be 42.8% blockchain growth per year till 2022 and the main catalyst behind this upliftment will be blockchain adopting in money exchange and cross-border payments.
5. 71% of business leaders using blockchain, as a report, believe that it will play a pivotal role in advancing the technology, resulting in widespread support for industry standards.

With these mind-boggling stats, it would be clear to you that developing Blockchain app is soaring as a business focus for several startups and established businesses. From manufacturing to media, telecommunications, finance, banking, healthcare, energy, real estate, and even government sector is showing interest in the production of Blockchain application development. 

So, are you prepared for the revolution called Blockchain apps development?

Though Blockchain is a tech breakthrough megatrend with unmatchable potential in the future, it will be completely impractical to invest in blockchain development with the fear of missing out, without a clear understanding of how can it be useful for your business – something that Blockchain app builders can help you get a clear idea of.

So, in this Blockchain Development Guide, we will cover the technical aspect of the Blockchain technology along with the ways you can integrate blockchain into your business processes in this article. And in case you need a more specific to a business handbook, head on to our personalized Blockchain guide for entrepreneurs.

Blockchain Technology

The answer to How to develop a Blockchain application starts with what it even means.
Blockchain, in a layman’s language, is a decentralized, transparent, immutable and publicly accessible database where digital information (transactional record) is stored in blocks and are paired to each other with hash function, such that the current block has the hash code of the previous entry and the next block will have the hash code of the current block.

On the business side, it’s an exchange network for transferring value from peer to peer. It is a mechanism that authorized a transaction and makes it valid from the legal perspective, without involving middlemen.

To better understand the blockchain technology and its working, check out this video:

Now, as you know what is Blockchain, let’s dig into the technical aspect of the technology, the meaning of Blockchain based application development, and ultimately the different prerequisites and the time and cost that would go into blockchain application development. All this starting with the blockchain types.

Types of Blockchain Systems/Solutions

The answer to how to develop Blockchain application starts with the categorization of the Blockchain solution type –

1. Network
2. Cryptocurrency support

Types of blockchain based on Networks

When talking about the blockchain development based on network, you can either go for Permissionless blockchain solutions or Permissioned blockchain solutions.

1. Permissionless Blockchain: In permissionless blockchains, the whole network in publicly accessible on all the computers and devices. Anyone can access the code, start running a public node on the local devices, initiate an interaction in the network, verify the transaction, and that also while remaining anonymous. In short, the blockchain which is decentralized, equally accessible and anonymously available is said to be Permissionless. Eg: Bitcoin, Ethereum.
2. Permissioned Blockchain: It refers to a closed ecosystem where only the authorized participants can act, based upon their particular roles. These types of blockchains are established on a set of rules that govern how a transaction will be implemented to cater the need of a particular organization (for eg: for database management, for auditing, etc.). Eg: Multichain.

This type of blockchain system provides core functionalities of the blockchain architecture, like automated data synchronization, immutability, ability to deal with multiple permissions, process automation, and stringent privacy and security features to name a few, and thus pave the way to build more efficient and data-driven business model at a lower cost.

Types of Blockchains based on Cryptocurrency Support

Based on the cryptocurrency involvement, Blockchains are broadly categorized as Cryptocurrency based and Non- cryptocurrency based solutions.

1. Cryptocurrency based Blockchain: As depicted by the name, these types of blockchain solutions run based upon the cryptocurrencies. The popular types of blockchains that fall into this category are:

   a. Wallets: These are secure digital wallets that hold the public or private keys with which one can send, store or receive cryptocurrencies. Also termed as Cryptocurrency wallet or crypto wallet, this blockchain type is mainly related to the conversion and trading of cryptocurrencies in a centralized, decentralized or hybrid scenario.

   b. Crypto Exchange: These are basically the blockchain systems used to trade cryptocurrencies or digital currencies. They accept credit card payment, postal money orders and other forms of payment and send the cryptocurrency into your cryptocurrency wallet. They are also called as Digital Currency Exchange (DCE) systems.

   c. ICO: Initial Coin Offerings (ICO) or Initial Currency Offering (ICO) is said to be a crowdfunding system that deals with the generation and selling of cryptocurrencies/crypto tokens.

   d. Dapp: A decentralized app or dApp development services is one that deals with app that is not controlled by a single entity. It can be run by multiple users on a decentralized, P2P network in real-time with the help of trustless protocols. Augur, Golem and Sia are the best examples of what a dApp development company can bring into existence.

2. Non-cryptocurrency based Blockchain: This type of blockchain app development services solutions do not depend on crypto tokens. Considered basically for inventory management, this blockchain type is based on Distributed Ledger technology (DLT).
   Wondering what Distributed Ledger Technology is? From a technical perspective, it is a database distributed across various nodes and computing devices. Here, each node has a replica copy of the ledger and can process it independently. And the most impressive thing is that the ledger is not governed by any central authority.The changes can be made on an individual level and then the node is voted to gain maximum approval. This process of voting where the consent from the majority is necessary for making update is called Consensus. Once the consensus limit is reached, the changes are directly made across the database.

Blockchain Development Platforms

While there are more than 25 platforms for building blockchain solutions, the top five platforms that the top mobile app development companies consider for blockchain/DLT development are:-

1. Ethereum: It is an open-source and public platform (and operating system) taken into consideration for blockchain dApp development and ICOs with smart-contract functionality. Unlike bitcoin, it is flexible and adaptable – making it the first choice for every blockchain app development company for building a blockchain app.
2. EOS: The aim of EOS platform is to offer smart contract capability, decentralized application hosting, and decentralized storage of the enterprise solutions which solves the scalability issues found in Blockchains such as Ethereum and Bitcoin, along with eliminating all the fees incurred by the users.
3. Multichain: It is a platform that empowers mobile app developers to create and deploy private blockchain solutions to be used within or between multiple organizations.
4. Hyperledger: It is an open-source platform used to create advance blockchain solutions. For example, building blockchain solutions based on IoT,  creating blockchain apps for supply chain management, etc.
5. IOTA: It is an open-source DLT based solution used for providing faster and secure payment services between connected IoT devices. This platform uses directed acyclic graph (DAG) technology and offers unique characteristics, like free transactions no matter what the size of the transaction is, faster confirmation times, handling of unlimited transactions at a time, etc. which makes it the ideal platform for building payment systems.
6. Quorum: It is an open-source DLT and smart contract platform based on Ethereum.

Now as you are familiar with different blockchain development platforms, you must be confused how to choose the right platform for developing a blockchain system. To make it easy for you, here I’m sharing the factors you need to look out for when answering How to Develop Blockchain app:-

1. Nature of Platform: While some blockchain platforms are cryptocurrency based, others are relying on smart contracts or using more than one crypto token. Determining which type is apt for you will make the Blockchain applications development process easier.
2. Smart Contracts: The second thing you need to pay attention to is to determine if you need a smart contract or not. A Smart contract, as you might know, is a self-executing protocol that processes, validates or enforces any trigger-based action stored on the blockchain system.
3. Consensus Protocol: Different blockchain development platforms work upon different consensus protocol, including Proof of Work, Proof of Stake, Proof of Elapsed time, Proof of Burn, etc. So, identifying the right platform on the basis of consensus protocol is also favorable situation.
4. Cryptocurrency: The next thing that you need to consider when answering How to develop a Blockchain app is whether you need the use of cryptocurrencies in your mobile application or not also plays a pivotal role in finding the right platform.
5. Public/Private Network: Ask yourself what kind of network you want – one where all are free to make changes or the one where authorized users only can participate. Based on the decision, choose the platform and start creating your own blockchain application.

Languages to Consider for Blockchain Development

Alike platforms, there are various programming languages that can be considered while blockchain application development. You can either begin with traditional programming languages like C++, Python, Go,  and Java, or turn towards the advanced blockchain-specific languages like Simplicity and Solidity.
Assuming that you will be familiar with the traditional languages, let’s talk about Simplicity and Solidity only.

1. Simplicity: Simplicity is used for smart contracts blockchain development. The language is easy, employ static analysis, and can be seen as an improvement of the basic cryptocurrency languages like Ethereum Virtual Machine (EVM) and Bitcoin Script.
   
2. Solidity: Solidity is a statically-typed blockchain development languages used particularly for building smart contracts that run on the EVM. With this language, you can easily implement self-regulated business logic in smart contracts, leaving a non-repudiable and authoritative record of transactions.

Blockchain Development: How much time and cost do it require?

With all this information, you must be curious the most asked questions – How much will it cost to make a blockchain application? Well, it is quite difficult to tell the exact cost directly, provided the blockchain development cost depends on the efforts required.
For example, if you wish to develop a blockchain wallet, the average time required will be:-

Process	Time required (in hours)
Backend Development	150-200
Frontend Development: Android	500-550
Front-end Development: iOS	470-510
Front-end Development: Web/Desktop App	80-100
Design	120-150
Quality Assurance/Project Management	60-80

Likewise, if you build any other blockchain app/system, the time and efforts required will be:

Blockchain Type	Time required (in hours)
Web Wallet	250-300
Crypto Exchange	450-600
Smart Contracts + Token Issue	50-70
ICO Site	130-180
ICO Full Service	6,000-8,000

With this reference, it might be easier for you to get an estimate of the funds you need. However, don’t treat as your final quote. The blockchain app development cost varies on the basis of different factors. So, it is better to discuss your app project with a blockchain app development company and find out the exact Blockchain app development cost breakdown structure.

But before you even move on to have that discussion, see if Blockchain is even used in your industry.
Here’s a list of Industries in which Blockchain has proved to be of maximum use.

Finance – Fintech is the industry which Blockchain made an entry with. The powering factors that the technology comes loaded with – Transparency and Decentralization is something that has raised the adoption of Blockchain in Finance domain.

Government – There are a number of Governments from Dubai to Thailand that have started incorporating Blockchain technology to streamline a number of their process, straight from voting to land demarcation and a series of other political issues.

Healthcare – Healthcare and Blockchain have a very direct relationship. The latter is used by the former for not just decentralizing the massive amount of data but also to curb the several instances of hacks and security breaches happening because of a lack of decentralized system.

Supply Chain – One of the most direct impact of Blockchain can be seen in the Supply Chain department of Operation Management. The technology makes it possible for the Supply Chain industry to ensure that no loophole is present in the system and there is a complete transparency across all Supply Chain straight from order procurement to delivery.

Real Estate – Because of the massive amount of data and paperwork that the property market deals with, makes Real Estate an ideal recipient of the Blockchain technology. Also, the Smart Contract feature comes in very handy in an industry that deals with numerous contracts.

While these industries are known to be prevalent adopters of the Blockchain technology, the decentralizing medium is not restricted to them. There are in fact several use cases for adopting the technology in the everyday process.

Let us look at some of them –

How to Implement Blockchain into Your Business Process?

Now as you are familiar with the tech-world of the blockchain, you must be excited to integrate blockchain technology into your business. Have a plan or still wondering how to use blockchain for a profitable business?

Blockchain, with its unparalleled potential, can be implemented into your existing business processes in various ways, such as:

1. For Transactions

Being the backbone of Bitcoin and other cryptocurrencies, blockchain technology is all set to revamp transactions. The absence of middlemen will not only speed up the process but also facilitate the service of fund transfer securely at an ultra-low fee.
Want some real-life example? Firms like Bitwage, Abra, and Coinpip are using the blockchain for fund transfer and handling payrolls.

2. As a Distributed Cloud Storage

You can also use blockchain to serve your customers with faster, convenient and secure cloud storage facility like the Storj company did.

3. As Smart Contracts

Smart contracts can be employed to bypass regulations and cut down the cost for a subset of numerous financial transactions. And the best part is that these contracts are secure and unbreakable.

[Know All About the powering Blockchain feature in our in-depth Smart Contract Guide]

Looking for some existing application? Slock, which is an Ethereum-based IoT platform, uses blockchain to empower customers to rent anything by unlocking a smart lock once both the end parties agree to the terms and conditions applied. While Synaps rely on blockchain to provide microloans.

4. For Notary Purpose

Blockchain development can also be taken into consideration for notary creation and authentication purpose.
Want some real-life examples? Uproov, a smartphone multimedia platform, provides notary creation services using the image, video or sound recording shared by the user via blockchain.

5. For Supply chain management

Since the supply chain mechanism involves components exchange from multiple entities, the failure at one end can affect the overall process. To tackle this situation, the blockchain technology can be used in the form of secure and permanent auditable records where the stakeholders can see the complete processing.
Looking for some real-life use cases? SkuChain and Provenance are two such companies using blockchain for streamlining the supply chain system.

6. In Digital Identification Process

Blockchain can be taken into practice to provide us with immutable, indisputable and secure digital identities, resulting in lesser fraud issues and seamless sign-in experience.

Want some real-life use cases? ShoCard uses blockchain to verify an identity of individuals on their mobile devices.

7. In Rewards and Loyalty Programs

By eliminating the middlemen, the blockchain aids the retailers to engage their customers with gift cards, rewards, and other loyalty programs in a cost-effective manner.
Wondering if there’s any such existing company/example? GyftBlock, which is a partnership between bitcoin API developer Chain and Gyft, provides digital cards that can be secured traded on the public ledger.

With all the above-mentioned information and examples, you must have started crafting your own blockchain app development idea. Have you? We would love to listen and contribute to your idea. Let’s meet and discuss!

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