--- title: "Web Application Development for Portals and Tools | Mandato" description: "Web application development for client portals, dashboards, booking systems and internal tools that run in the browser and connect to your data." url: https://mandato.agency/web-design/web-app-development/ last_updated: 2026-10-18 language: en --- Web Design Services # Web Application Development for Portals, Dashboards and Tools Our web application development work turns a manual process into a tool your team or customers use in the browser. That could be a client portal, a booking system, a quoting tool or an internal dashboard. We scope it carefully, build it in stages and hand you code you own. [Get a free proposal](https://mandato.agency/contact/) Read the FAQ Price In your free proposal Based on your goals and scope Part of [Web Design Services](https://mandato.agency/web-design/) Proposal Free Plan and price in writing ## When a web app makes sense A marketing website shares information. A web app does work: people log in, enter data, get results and come back. If your team runs a key process on spreadsheets, email threads and copy-paste, a web app can usually take over that work. Common projects include customer portals for documents and invoices, scheduling and booking tools, quote builders, member areas, reporting dashboards and simple marketplaces. Off-the-shelf software is often cheaper, so we will tell you if a SaaS product already does what you need. ## What our web application development service includes Each project covers the full path from idea to a working product. - **Discovery and scope** – We map users, roles, data and workflows, then write a feature list split into a first release and later phases. - **[UX and interface design](https://mandato.agency/web-design/ui-ux-design/)** – Wireframes and clickable prototypes so you can test the flow before code is written. - **Front end and back end** – We build with common, well-supported stacks such as React or Vue on the front end and Node.js, Python or PHP on the back end. - **Integrations** – Connections to payment processors, CRMs, accounting tools, email services and your own databases through their APIs. - **Security and access** – User roles, secure sign-in, encrypted connections and regular dependency updates. - **Hosting and support** – Deployment to cloud hosting with backups, monitoring and a support plan after launch. ## How we build in stages Step 1: Discovery. We interview the people who will use the app and document how the work is done today. Step 2: Prototype. You click through the main screens and we adjust before development. Step 3: First release. We build the smallest version that does the core job well and put it in front of real users. Step 4: Iterate. We add features in short cycles based on feedback and usage data. You see working software at the end of each cycle, not just status reports. If the app needs a public marketing site, our [custom web development](https://mandato.agency/web-design/custom-development/) team can build it on the same stack. ## Web application development cost Web application development cost depends on the number of user roles, screens, integrations and how complex the business rules are. A simple internal tool with one role costs far less than a customer-facing portal with payments and permissions. You get a clear price in your free proposal, after we look at your goals. ## Choosing a web application development company Ask any web application development company who owns the code, how they test it and what happens if they stop working with you. With us, you own the code and the hosting accounts from day one. We document the setup so another developer could take over. See our [Speed Exam case study](https://mandato.agency/case-studies/speed-exam/). We will not promise a launch date before scope is agreed, and we will flag features that add cost without clear value. See our [wider web design and development services](https://mandato.agency/web-design/). Last updated: 18 October 2026 Get a free proposal Tell us about your goals. We'll reply with a plan and a price. [Get my free proposal](https://mandato.agency/contact/) Results ## Before and after: proof from client work Screenshots from client accounts. Each caption says only what the screenshot shows. [![SpeedExam: 31.8K monthly organic traffic, up 45%.](https://mandato.agency/assets/img/evidence/speedexam-semrush.jpg)](https://mandato.agency/assets/img/evidence/speedexam-semrush.jpg) SpeedExam 31.8K monthly organic traffic, up 45%. Source: Semrush, India, 19 Mar 2026 Case studies ## Related case studies Results from our Web Design Services work. ![Speed Exam logo](https://mandato.agency/assets/img/clients/speed-exam.png) - EdTech ### [Speed Exam](https://mandato.agency/case-studies/speed-exam/) From removed by Google to ₹30L a month in 2 months FAQ ## Web Application Development Services: questions ### What is the difference between a website and a web application? A website mostly presents content. A web application lets users log in, enter data and complete tasks, such as booking, ordering or managing accounts. Many projects combine both. ### Should we build a web app or a mobile app? A web app runs on any device with a browser and needs no app store approval. It is often the faster first step. A native mobile app makes sense when you need offline use or deep device features. ### How long does it take to build a web app? It depends on scope. We aim to get a first release in front of users as early as we can, then add features in cycles. You get a timeline after discovery, once the feature list is agreed. ### Do we own the code? Yes. The code repository, hosting and third-party accounts are in your name. We document the setup so you are not locked in. ### Can you take over an existing web app? Often, yes. We start with a code review to check quality, security and documentation. Then we tell you whether to keep building on it or replace parts of it. --- Mandato Agency · https://mandato.agency/web-design/web-app-development/ · hello@mandato.agency