Custom Android, iOS & Cross-Platform Development

Turn Your App Idea Into a Working Business Product

Designing and Marketing IT Solutions provides custom mobile app development services for startups, small businesses and growing organizations. From planning and UI/UX design to development, testing, deployment and support, we help you move from an initial idea to a clearly scoped digital product.

Our experience includes published Android applications for restaurant billing, dairy management, gaming-zone operations, inventory management and mobile phone repair businesses.

Based in Mohali, India, with remote project collaboration available for businesses in India and international markets.

Mobile App Development Backed by Published Products

Designing and Marketing IT Solutions is an India-based mobile app development company building Android, iOS and cross-platform applications. Our published Android portfolio includes Bill Sarthi, Milkman Sarthi, Gaming Zone Management Software and Mobile Sarthi.

4 Published Apps Available on Google Play
Android & iOS Platform-specific planning
UI/UX to Launch Complete project lifecycle
Business Applications Workflow-focused development

Mobile Apps Developed and Published by Our Team

Explore working business applications published on Google Play under Designing and Marketing IT Solutions. These are real products built for specific business workflows—not demonstration concepts.

Bill Sarthi

Restaurant & Cafe POS Billing

A restaurant management and POS billing application developed for restaurants, cafés, cloud kitchens, food trucks, QSRs and other food businesses.

  • POS billing
  • KOT and KDS
  • Table management
  • Inventory tracking
  • Expense management
  • Business reports
View Bill Sarthi on Google Play

Milkman Sarthi

Milk & Dairy Management App

A dairy business management application for milk sellers, dairy shops, distributors and milk-delivery businesses.

  • Milk sales
  • Dairy billing
  • Customer accounts
  • Stock management
  • Digital khatabook
  • Sales reports
View Milkman Sarthi on Google Play

Gaming Zone Management Software

Gaming & Entertainment Manager

A management app for PlayStation cafés, PC gaming zones, pool cafés, snooker clubs and indoor entertainment businesses.

  • Timed sessions
  • Device tracking
  • Pool and snooker tables
  • Bookings
  • POS billing
  • Business reports
View Gaming Zone App on Google Play

Mobile Sarthi

Mobile Phone Repair Manager

A business-management application for mobile phone shops, repair centres, retailers and other small businesses.

  • Purchases and sales
  • Repair-order tracking
  • Inventory management
  • POS billing
  • Customer records
  • Business reports
View Mobile Sarthi on Google Play

Need an application for a similar business workflow? Discuss your requirements with our team.

Need an App but Not Sure Where to Start?

Mobile app development begins with business and user decisions—not with choosing technology prematurely. We help you examine the questions that shape the project.

Should the app be built for Android, iOS or both?

Which features belong in the first version?

Would native or cross-platform development be suitable?

Does the app need a backend and web admin panel?

Which payments, APIs or hardware need integration?

What maintenance will be needed after launch?

Our Mobile App Development Services

The final service scope is based on your users, operational workflow, integrations, platform requirements and long-term product plan.

01

Android App Development

Custom Android applications planned around your target users, business workflow, device requirements and required integrations.

02

iOS App Development

iOS applications designed around Apple devices and the intended user experience, with testing and store-submission requirements considered.

03

Cross-Platform App Development

A unified development approach for suitable Android and iOS projects, evaluated against performance and device-level feature requirements.

04

Native Mobile App Development

Platform-specific development for applications requiring deeper device integration, specialized functionality or a highly customized experience.

05

MVP App Development

A focused first version built around the essential features required to test an idea, collect feedback and plan later releases.

06

Business Management Applications

Workflow-driven applications for billing, POS, inventory, customers, bookings, field operations, expenses, staff and reporting.

07

Backend and Admin Panel Development

Backend APIs and web-based admin systems for managing users, products, orders, permissions, content, reports and application data.

Explore web portal development →
08

API and Third-Party Integrations

Feasibility-led integration with supported payment, maps, messaging, accounting, CRM, ERP, printer, hardware and external API services.

09

Embedded and Connected-Device Software

Assessment and development for supported mobile experiences that need to communicate with documented devices or hardware systems.

10

App Maintenance and Enhancement

Scoped support for bug fixes, compatibility updates, feature enhancements, API changes and evolving business requirements.

Explore maintenance services →

What Can Be Included in Your App Project?

Every project has a different scope. Your proposal should state exactly which deliverables are included and which services are optional.

Strategy and Planning

Requirement discovery, feature planning, user flows, modules and project milestones.

UI/UX Design

Wireframes, interface design, user journeys and an interactive prototype where required.

Mobile Development

Android, iOS, native or cross-platform development based on the approved approach.

Backend and Database

APIs, database logic, authentication, permissions and a web admin panel where required.

Integrations

Supported payments, maps, notifications, external software, APIs or device connectivity.

Testing and Deployment

Functional review, supported-device testing, release preparation and scoped store assistance.

Technical Handover

Access, accounts, source-code terms and documentation as defined in the agreement.

Post-Launch Support

Agreed maintenance, issue handling, compatibility updates and future feature planning.

Product Enhancements

New modules and workflow improvements planned after user feedback and business validation.

Native or Cross-Platform: Which Should You Choose?

The correct approach depends on your users, features, budget, device integrations, performance expectations and long-term product roadmap.

Development option Generally suitable for Important consideration
Native Android Android-first audiences and deeper Android-specific functionality. A separate iOS application may be required later.
Native iOS Apple-device users and platform-specific experiences. A separate Android application may be required.
Cross-platform Suitable projects planning Android and iOS releases together. Some device-specific features may still require native work.
MVP Testing a business idea with essential first-version features. Non-essential functionality is planned for later releases.

Our Mobile App Development Process

The process creates clear review points before development, during implementation and before release. Exact deliverables depend on the approved project scope.

01

Consultation and Requirement Discovery

We begin with the business problem, target users, required features, existing systems and expected outcome. This helps identify missing requirements and technical dependencies early.

02

Scope and Planning

The app is organized into modules, user journeys and milestones. The proposed platform, integrations, deliverables, responsibilities, assumptions and exclusions are documented.

03

User Experience and Interface Design

We plan how users move through the app and complete important actions. The interface is designed around usability, content hierarchy, brand direction and target devices.

04

Prototype and Approval

Where included, an interactive prototype demonstrates the proposed screens and user journey. Early feedback helps reduce avoidable design changes during development.

05

Mobile App Development

The approved features, business logic, backend connections and integrations are implemented. Milestone reviews can be used to assess progress at important stages.

06

Testing and Quality Review

The app is reviewed for agreed functionality, user flows, form validation, integrations and supported-device behaviour. Identified issues are documented and resolved within the agreed scope.

07

Deployment and Store Submission

After approval, the app is prepared for deployment. Store-submission assistance can be included, while final approval remains subject to Google Play or Apple App Store policies.

08

Maintenance and Future Development

Post-launch updates, support, compatibility work and future features are handled according to the separate maintenance or enhancement scope.

Mobile App Cost and Development Timeline

A responsible estimate is based on a defined scope. We do not apply one fixed price or timeline to applications with different users, features and integrations.

Project Estimate

How Much Does Mobile App Development Cost?

Cost depends on the actual planning, design, development, integration and testing effort required for your application.

  • Android, iOS or both platforms
  • Number of screens and user roles
  • UI/UX and workflow complexity
  • Backend and admin-panel requirements
  • Payments, APIs and device integrations
  • Reports, notifications and real-time features
  • Testing, deployment and maintenance scope
Delivery Planning

How Long Does It Take to Develop an App?

A focused MVP generally requires less work than a multi-role business app containing complex reports, real-time functions, hardware connectivity or a large administration system.

  • Confirm the essential features
  • Identify third-party dependencies
  • Finalize the platform and approach
  • Approve user flows and design
  • Define testing and deployment requirements
  • Control changes after scope approval

After requirement discovery, we can prepare a project-specific proposal with the recommended approach, deliverables, exclusions and estimated schedule.

Ownership, Confidentiality and Security Planning

Important commercial and technical responsibilities should be clear before full development begins—not discovered at the time of launch or handover.

Source Code, Accounts and Ownership

The project proposal or agreement should clearly specify the ownership and handover arrangements applicable to your project.

  • Source-code ownership
  • UI and design-file ownership
  • Backend and database access
  • Domain and hosting ownership
  • Google Play and Apple account ownership
  • Third-party licences and subscriptions
  • Credentials and handover requirements

Confidentiality and NDA

If your idea, workflow or technical information is confidential, discuss an NDA before sharing sensitive details. Project access, credentials and responsibilities should also be documented before development begins.

If complete source-code handover or deployment through your own store accounts is required, mention it during consultation so it can be included in the commercial scope.

Authentication and Access

User authentication, roles and access-control requirements are defined according to the app's users and data.

Data and Privacy Requirements

Storage, retention, deletion and privacy responsibilities are reviewed based on the application use case.

API and Credential Management

API access, external services, credentials and third-party responsibilities are identified during planning.

Backup and Recovery

Backend backup, recovery and operational continuity requirements are scoped where the project requires them.

Payment Responsibilities

Payment-gateway feasibility, account ownership and third-party compliance responsibilities are clarified.

Release and Update Planning

Store requirements, supported versions and future compatibility responsibilities are included in release planning.

Why Choose Designing and Marketing IT Solutions?

Our focus is to understand the business workflow, define the scope and create a product that can be reviewed, deployed and supported responsibly.

Published Business Applications

Our portfolio includes working Android applications available publicly on Google Play.

Business-First Planning

We begin with users, workflows and outcomes before recommending the technical approach.

Complete Project Lifecycle

Planning, design, development, testing, deployment and support can be covered under a defined scope.

Custom Features

The app can be planned around your user roles, reports, workflows and supported integrations.

Clear Deliverables

Features, exclusions, responsibilities, ownership terms and support expectations should be documented.

Long-Term Product Thinking

The first release and future improvements are planned around user feedback and business priorities.

Frequently Asked Questions About Mobile App Development

Do you develop both Android and iOS applications?

Projects can be planned for Android, iOS or both platforms. The recommended approach depends on your target users, required features, integrations, device requirements and available budget.

Can you develop an MVP for a startup?

Yes. An MVP can focus on the essential features required to test the product idea. We first identify what belongs in the initial version and what can be planned for future releases.

Can I see mobile applications developed by your team?

Yes. Bill Sarthi, Milkman Sarthi, Gaming Zone Management Software and Mobile Sarthi are publicly available on Google Play under Designing and Marketing IT Solutions. Their official store links are included above.

How much does it cost to develop a mobile app?

Cost depends on the platforms, features, interface complexity, backend, integrations, testing and deployment requirements. A project-specific estimate can be prepared after your requirements are reviewed.

How long does mobile app development take?

The timeline is determined after confirming the scope, platform, user roles, design process, integrations and approvals. New or changed requirements after scope approval can affect the delivery schedule.

Will I own the source code?

Source-code ownership and handover terms should be specified in the project proposal or agreement. If complete source-code handover is required, inform us before the commercial scope is finalized.

Can you build a backend and web-based admin panel?

A backend and admin panel can be included when required. Its users, modules, permissions, reports, data controls and integrations are defined as part of the approved project scope.

Can the app integrate with payment gateways or existing software?

Supported third-party APIs and services can be evaluated for integration. Feasibility depends on API availability, documentation, access, platform rules, third-party charges and technical compatibility.

Do you help with Google Play and Apple App Store submission?

Store-submission assistance can be included in the project scope. Final review and approval are controlled by Google or Apple and remain subject to their current platform policies.

Can you update or improve an existing application?

An existing app can be assessed for bug fixes, interface improvements, feature additions, API changes or modernization. The current source code, dependencies and technical condition must be reviewed before feasibility can be confirmed.

Do you provide maintenance after launch?

Post-launch maintenance can be scoped separately. It should define the included bug fixes, compatibility updates, monitoring, new features, support channel and response expectations.

What information do you need to prepare an estimate?

Share the app idea, target users, main features, required platforms, user roles, similar app references, backend needs, integrations, preferred launch period and available budget range. Undecided items can be discussed during the initial consultation.

Let’s Discuss Your Mobile App Idea

Whether you are planning an MVP, a customer-facing application or a complete business-management platform, the first step is to define the problem, users and essential features. Share your requirements to begin a project-specific discussion.

Get a Free Consultation