Here are some of the most popular options among developers:
- Ethereum is the most popular option that will allow you develop a blockchain application and create your own ecosystem using the Solidity programming language. Suitable for most projects that rely on decentralization, transparency and security.
- TRON is a free global financial system that allows you exchange tokens or digital content in an easy and cost-effective way. For example, game items in online games or movies and TV shows on Netflix. The peculiarity of TRON is that its blockchain allows you to make such exchanges instantly and with a very low commission, thanks to which even trade transactions for $ 1 will be profitable
- IOTA is an open source distribution ledger for the Internet of Things that uses a directed acyclic graph instead of the traditional blockchain (DAG). Provides features such as commission-free transactions, processing unlimited transactions at a time, faster confirmation time. This enables faster and safer interactions between IoT devices.
- R3 Corda - J.P. Morgan for the banking sector. Its main feature is simple and fast integration with outdated systems (large banks, as a rule, use rather old software).
- EOS is a platform focused on solutions that rely on smart contract functionality, decentralized application hosting and decentralized storage for an enterprise solution that completely eliminates scalability issues.
Step 4. Development of the application framework
An example of a low (left) and high (right) precision of framework. Source
The process of building a blockchain application on Android & iOS is similar to the process of building a house. Before you start laying the foundation, you need to develop an architectural plan that will give you an idea of what kind of house and what you will be building of. The framework of your application is the same architectural plan that you will use to build your software product.
Frameworks depict the basic structure of an application, its appearance, user path, approximate appearance of application screens, and so on. With such a scheme, developers can understand what functionality they need to implement and how long it will take them to do so, which helps to budget the project.
Frameworks development usually requires two steps:
- Creating a low-precision framework. A rough, schematic sketch to help you quickly get an idea of the basic structure of your application. Most people learn such visualization easier than the presentation of the project in the form of text, tables and diagrams.
- Creation of a high-precision framework. In such a scheme, annotated blocks are replaced with images, ready-made articles (texts) and links.
Step 5. Creating the user interface
An example of a ready-made blockchain application interface design. Source
Once the framework has been created, you can start developing an attractive user interface for your blockchain application. This is a very important stage, since the user experience will depend on it - how the user perceives the interface: pleasant colors, convenient icons, intuitive transitions between screens. Or vice versa: it is not clear what and how to do, small icons that cannot be hit, some kind of toxic color scheme.
Here's what designers should do at this stage:
- Define the style. Several sets of images (moodboards) are being prepared, which show application screens with different color schemes, font compositions, buttons and illustrations. These images are sent to the customer and / or the focus group, which chooses the nicest and the most appropriate for niche.
- Create a design concept. It is intended to show you what the finished application will look like. If the previous stage gave only a general direction, then the concept is designed to cross this direction with filling the interface (high-precision framework). Usually, for this, they make a complete design of 1-3 screens of the application, after which they are sent for approval.
- Design all the screens. If the concept is good, designers proceed to finalization of the appearance of the interface, which results in a complete schematic structure of all interface screens. Then all screens are assembled into an interactive prototype, which gives the most approximate experience of using the application without implementing it in code.
- Create interface animation. During this stage, designers define how icon clicks, screen transitions, video / image opening, etc. will look like. Usually animation is done using Adobe Photoshop or another tool, and then videos are made from this. The customer needs videos to understand how the animation will look in the final version, as well as developers who will be guided by these videos when implementing the design and functionality of the application in code.
- Prepare materials for developers. After completing the creation of the interface, the designers send the developers sprites, fonts with all icons, a UI Kit with repeating interface elements and their states, as well as all other materials with documentation.
Step 6. Implementing the application in code
After designing the UI / UX, the process of implementing this design and application business logic in code begins. This usually means implementation at the background (backend) and foreground (application interface) levels. This process may look different depending on several aspects:
- What language and platform do you choose for your project.
- Whether you using BaaS or creating your own blockchain.
- Strategy of communication and transactions between all nodes.
- Selected blockchain consensus mechanism.
- Which SDK APIs are you using.
This usually involves creating a minimum viable product (MVP), which is used to validate the concept and receive feedback. With this data, the product is being finalized to the release version.
Step 7. Testing and verification
Thorough testing of your blockchain application is one of the prerequisites for developing blockchain applications if you intend to add your product to the listings of the Google Play Store or Apple App Store. These sites necessarily require that the app be tested based on various parameters and criteria, be free of errors (critical) and work well in any use case. In addition, you also need to check the performance of the application under increased load.