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Web app development
Your strategic development partner:
from idea to a working product Your strategic development partner: from idea to a working product
Professional web app development and custom system building. We ensure clean technical architecture, modern solutions, and ongoing support, so your business keeps moving without interruption.
From $10,000 + VAT · free project estimate
Turn your idea into a working productTurn your idea into a working productfrom strategy to launch, all in one team.from strategy to launch, all in one team.
We've built a wide range of apps, such as:
What is a WEB app?
A web application is an interactive web-based application that uses resources on a web server and is accessed via a web browser. WEB applications are designed for efficient communication between the user and the system and allow various actions such as data management, purchasing, etc. Unlike conventional websites, which are usually static and designed to present information, WEB applications are dynamic, adapting to the user’s actions and allowing the creation of an individual user experience.
How is a WEB app different from a website?
One of the biggest differences between web apps and web pages is that the design of web apps is driven by the interests of the user. Traditional website design is based on versatile solutions that can increase ease of use. In contrast, a web app has an API that intercepts big data from the user side and then passes that data to automation.
Personalized user experience
The web app adapts to each user's needs and behavior, instead of showing the same content to every visitor.
Actions and data management
Lets users perform complex actions and manage data in real time, not just read static text on a page.
Real-time content
Content changes based on what the user does, so every visit is dynamic and tailored to the specific context.
API integration and data transfer
Web apps have API connections that automatically pass data to other systems and business processes, with no manual work.
Secure data processing
Lets you safely collect, store, and process user information while ensuring efficient communication between the user and complex system logic.
What web apps do we build?
From SaaS products to internal systems, we build solutions that fit your business logic, not the other way around.
SaaS products
Have an idea you'd like to turn into a standalone digital product? We build SaaS solutions from concept to a working platform, with payment integration, user management, and architecture that grows alongside your business.
Business automation
Order management, reports, team workflows, everything that today happens manually or in Excel spreadsheets. We build internal systems tailored to your processes that eliminate human error and give your team back hours every week.
AI solutions
AI is already working inside your competitors' products, the only question is whether it's in yours too. We integrate AI functionality into existing or new solutions: content generation, automated analysis, intelligent workflows, and more.
Client portals and e-services
Registration, orders, payments, documents, all of it available to your clients in one place, anytime. We build client portals that raise your service level, reduce your team's workload, and create a professional impression from the first login.
How can a web app benefit your business?
A web app is not just a website. It's a powerful business optimization tool that takes user experience and operational efficiency to a whole new level.
For example, if a company has an e-commerce app that can track and analyze which products a visitor spent the most time on, it can suggest similar items the next time that user logs in.
If that same company only had a website, the user experience would rely on static content that's identical for every visitor.
Most of the mobile apps we use every day are actually web apps. Here are a few common examples:
- Facebook, Instagram, X, and other social media platforms
- Gmail, Yahoo, AOL, and other browser-based email apps
- Q&A platforms like Quora or Google
- Self-service portal solutions
- Many of the largest online stores
Process automation and cost reduction. A custom-built web app can take over repetitive tasks your employees currently handle manually.
Higher conversions and customer loyalty. Unlike a website, a web app adapts to each user's actions and creates a personalized experience, rather than the same content for everyone.
Accessible on any device. Web apps run through the browser, so your clients don't need to download or install anything.
Easy scalability. As your business grows, the web app can be steadily expanded with new features and integrated with external systems.
Our experience
Web apps we've built
The web app development process
At this stage, our experts translate your business requirements into technical documents for your online solution. A team is also formed and its designers create the basic design. This phase is the basis for the whole project.
We build the management system and shape the functionality. We implement the design. Programming with AI agents helps implement complex logic faster and maintain high code quality.
We release the WEB application on the market and train you on how to use the management system. After the training, we also share videos to remind you how to make basic changes without our help.
Apps often need new features or changes to meet rapidly changing customer demand. We can provide you with a small team to carry out these upgrades efficiently. We also provide information on maintenance and safety.
How do I choose a WEB development partner?
Whether you’re a start-up or the CEO of a large company, the success of your future digital product will be influenced by the strategic decisions you make now and the goals you set. The right WEB development partner should act as a guide and advisor through this crucial process. With us, you can be sure that the final product will meet your and your customers’ expectations.
Free strategy sessionWeb application development cost
While every project is unique, a custom web application typically falls within this range: $10,000 – $100,000+ + VAT depending entirely on your unique business complexity and growth goals.
What influences the cost?
Primary cost drivers include:
The more screens, unique functions (like user profiles, payment processing, or real-time chat), and advanced logic you need, the higher the cost.
Custom, unique design and complex animations cost more than using standard templates.
Connecting your app to other systems (like Salesforce, Stripe, or custom APIs) adds development time and cost.
Building the app to handle a large number of users and high traffic from day one requires a more complex, costly architecture.
Highly experienced developers and teams in high-cost regions generally have higher hourly rates.
Ongoing maintenance, support, and future updates should be factored into the total cost.
Our specialists, your business growth
Every project is led by a team that understands both technology and business logic, so you get not just a working system but measurable results.
“What impressed us most about "Mantas Digital, MB" was their proactive approach and genuine commitment to helping us succeed.”
Director, RetailRetail
“What stood out when working with "Mantas Digital, MB" was their ability to combine technical expertise with business understanding.”
Manager, 360 ArenaArts, entertainment & music
“The most impressive part was that the entire result was delivered not only in text, but also with visual materials.”
CEO, MB EvlaidaiE-commerce
“We were impressed by the number of comments and how specific they were.”
CEO, Flowers & LoversRetail
“Mantas Digital brought my ideas to life.”
Manager, KA projektai, UABOther industries
“Their response was always clear and fast.”
Owner, ZinaukonoriuOther industries
“They responded to our needs and made the necessary changes.”
CEO, Help the Street ChildrenNon-profit organisation
“The professionalism and courtesy of Mantas Digital, MB was exceptional, so we felt heard and understood.”
Founder, 360 Degrees Cycles LTDRetail
F.A.Q.
Frequently asked questions
Web app development can raise a lot of questions, so here are answers to the ones that come up most often.
Don't see the answer to your question? Get in touch →
Ready-made solutions (like Salesforce, HubSpot, Monday) are built for the "average" user. They come with plenty of features you'll never use, while the ones you actually need may be missing. A custom web app is built to match your exact business processes: it works the way you work, not the other way around. On top of that, you pay once for the build, instead of an ever-growing monthly subscription.
Yes. Programming with AI agents is an integral part of our process. We implement complex logic and integrations faster, so you get results sooner and the cost stays reasonable.
We build SaaS products, internal business management systems, client portals and e-services, order and reporting tools, and solutions with AI functionality. If you have a different idea, let's discuss it in a free consultation.
The timeline depends on the project's complexity: a simpler product can launch within a few months, while a more complex system may take longer. We give you an exact timeline after the start phase, once the project scope is clearly defined.
Yes. We build a management system you can use yourself, and after launch we train your team and share videos. If needed, we can also provide ongoing maintenance.
We focus on data security from the design stage: we use secure authentication and encryption, control access rights, and update the system regularly. After launch, we can provide maintenance and security services.
What happens next:
- We analyze your business processes and expected user flows to choose the right technical foundation that ensures the app runs smoothly and fast.
- Our team lays out a clear app structure and user journey based on best practices, so your investment delivers maximum value and works comfortably for the end user.
- You get a concrete action plan, including a clear picture of what ongoing support and your product's growth in the digital space will look like.
