In the modern age of Information and communication system, people are habituated to use computers and computer applications. But Mobile Application use and development is a new and rapidly growing sector. There is a global positive impact of mobile application. Using mobile application developed country are becoming facilitate and people, society of developing country are upgrading themselves and making a new type of IT infrastructure. Mobile applications are running on a small hand hold mobile device which is moveable, easy to use and accessible from anywhere and any place. Now a day, so many people are using mobile application to contact friends, browse internet, file content management, document creating and handling, entertainment etc. From everywhere user can get facility of mobile application. People can do many things of his daily life and business life. Not only the mobile application has an impact for user but also it plays an important role in business. Many business companies are earning revenue using mobile application. The mobile application has an impact on society. The mobile application run in a mobile environment which usability depends on several factors such as: Screen resolution, Hardware limitations, Expensive Data Usage, Connectivity issues, Limited Interaction possibilities. Last few years the mobile companies are trying to develop mobile device with more screen resolution, more storage, better connectivity which provide better environment for modern mobile application

1. Mobile app development is the act or process by which a mobile
app is developed for mobile devices, such as personal digital
assistants, enterprise digital assistants or mobile phones. These
applications can be pre-installed on phones during manufacturing
platforms, or delivered as web applications using server-side or client-side
processing (e.g., JavaScript) to provide an "application-like" experience
within a Web browser. Application software developers also must consider
a long array of screen sizes, hardware specifications, and configurations
because of intense competition in mobile software and changes within each
of the platforms.
As part of the development process, mobile user interface (UI) design is
also essential in the creation of mobile apps. Mobile UI considers
constraints, contexts, screen, input, and mobility as outlines for design. The
user is often the focus of interaction with their device, and the interface
entails components of both hardware and software. User input allows for
the users to manipulate a system, and device's output allows the system to
indicate the effects of the users' manipulation. Mobile UI design constraints
include limited attention and form factors, such as a mobile device's screen
size for a user's hand(s). Mobile UI contexts signal cues from user activity,
such as location and scheduling that can be shown from user interactions
within a mobile app.

2. Types of Mobile Application Development
Three Types of Apps:
1. Native
2. Hybrid
3. Web
Native mobile apps:
Native apps are developed for a certain mobile device operating system like
Windows Phone or Android. Therefore, they are native for a certain device or
platform. Apps built for Android, Windows Phone, Blackberry, Symbian cannot be
used on any other platform expect on their own. Therefore, a mobile app
designed for Android can only be used on an Android device. Main advantages
of native apps are good user experience and high performance. In addition, an
access to broad range of APIs puts no limits on app usage. Native mobile apps
are accessible form app stores of their kind and have that very clear tendency of
reaching target customers. Some disadvantages of native mobile apps include
higher costs in comparison to other types of mobile apps. Creating a native
mobile app duplicates costs since maintenance and separate supports for
different apps are required that result in greater product price.
Hybrid mobile apps:
Hybrid mobile apps are specifically built using different multi-platform web
technologies like JavaScript and HTML5. Hybrid apps are website applications
created in a native wrapper that means they use elements of both native and
web-based apps. Hybrid apps also possess common cons and pros of both web
mobile and native mobile applications. Hybrid multi-platform mobile apps are
relatively easy to develop which is a clear advantage. Since code base for hybrid
apps ensures that low-cost maintenance alongside smooth updates. On the other
hand, hybrid application lack in speed, performance and overall optimization
compared to native mobile apps. There are also specific design issues thanks to
apps inability to look in the same way on different platforms.

3. Web apps:
Web apps use a certain browser in order to run and they are commonly written in
CSS, JavaScript or HTML5. Web apps redirect users to URL and further offer
install options by creating a bookmark on their browser. The greatest advantage
of web apps is that they require a minimum of device memory. Users can access
web apps from any device that is connected to the Internet. All personal
databases are saved on a certain server, so the use of web applications with
poor internet connection commonly results in very bad user experience. Another
drawback on web apps is access to not so many APIs, with exception of
geolocation and several others. In addition, a performance of web-based apps is
inextricably linked to network connection and browser work. Therefore, only
around fourteen percent of time users spend on web-based apps as only some of
device APIs can be used like geolocation.
Mobile App Objective
What Is Your Product Vision Statement?
A vision statement defines a clear direction towards the end goal of the mobile
app. On top of that, a vision statement describes the solution to the problem your
intended users are facing. In your vision statement, you need to include who the
product is for, what the user is trying to accomplish, how the product will solve
the user’s pain points, and how the product is different from competing apps in
the market.

4. Create A List Of Features
The first version of your mobile app needs to offer a simple and intuitive user
experience. Choosing features for your mobile app is a planning process that
requires you to define the product vision, objectives, and themes fully. Some
standard features can include:
● Sign-up and login
● Onboarding
● Splash screen
● Navigation
● Image galleries
● Forms
● Social media integration
● Social Feeds
● Product menus
● Shopping carts and payments
● Loyalty cards
● Booking systems
● Calendar integrations
● Push notifications
● Native video
● Native maps
● Device hardware access
● App analytics
Monetization Model
There are several monetization strategies worth exploring. The strategy you
choose will depend on the type of app you’re developing, your target user, and
even the mobile operating system you want to utilize. There are five conventional
monetization models:
1. Advertising
2. Pay per download
3. In-app purchases
4. Freemium
5. Subscriptions

5. Choosing A Platform
The ideal approach to development is to launch on both platforms; however, that’s not
always feasible. Sometimes, you will have to develop for one platform first and
introduce a second platform later for reasons like time constraints, budget, and resource
limitations.
Both iOS and Android offer distinct advantages, but also attract contrasting users. When
deciding what platform is best for your mobile app, a key question to ask is: what is the
goal and purpose of your application? Is the sheer volume of users the main identifier of
success for your app, or is your focus on driving engagement? Choosing the
appropriate platform will depend on the goal you’re trying to achieve and how you plan
to monetize your mobile app.
Include Maintenance And Upgrade
Requirements
Dependencies are any aspect that the product or product team relies on to meet
objectives. These may include:
● Hardware that the app will run on/communicate with (for example, beacons)
● Service/API documentation
● Profile/account/platform credentials
● Any third-party software your app relies on
● Any flowcharts, documents, or information related to the product
Submission
Your mobile app requirements document should include all technical assets and
information required for Apple’s App Store submission and Google Play
submission. Defining these requirements in the early stages of a project will
significantly expedite the submission process when the product is ready for release.
While these will vary depending on the app stores being submitted to, below are the
assets and information to include for the Apple App Store and Google Play.

6. Apple App Store
● iTunes Connect Account access
● Company/Entity Name
● App Store app listing name
● Search keywords
● Bundle id / SKU
● Demo account for reviewers
● Description
● Support URL
● Marketing URL
● Privacy policy
● App category
● Copyright information
● Contact information
● App icon (1024×1024)
● App Store distribution provision profile
● App Store distribution code signing identity
● Screenshots (correct sizes based on devices)
Google Play
● Google Play Developer access
● Store listing name
● Paid/free
● Short description
● Full description
● App icon (512×512)
● Feature Graphic (1024×500)
● App type
● App category
● Content Rating
● Contact Email
● Privacy Policy
● Screenshots (correct sizes based on devices)

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