A mobile app that connects families with a caregiver, nurse, or care specialist in just a few steps. The client describes the service— providers respond with their rates and experience. Published on the App Store and RuStore. Full development cycle: product design, Flutter app, Node.js backend, and launch on the app stores.
“Sister” is a startup that cuts out the middlemen between families and private medical professionals. Instead of calling numbers in classified ads or asking around— the app: describe the procedure, receive responses from verified caregivers and nurses, choose based on ratings and price, coordinate a time via WhatsApp—and help arrives.
— App description in the App Store
The app features two roles with fundamentally different interfaces and logic— the service requester and the service provider. Their paths intersect only when a request is responded to.
A family is looking for help for a loved one—at home, at a convenient time, from a trusted professional.
Caregiver, nurse, or care specialist—receives a steady stream of clients without phone calls or intermediaries.
Cross-platform Flutter — to deploy to iOS and Android from a single codebase without compromising on quality. Backend on Node.js — for marketplace logic, real-time contractor responses, and push notifications.
The market for private in-home healthcare in Russia consists of thousands of posts on social media, chats on messaging apps, and requests like “Can you recommend someone you know?” The startup “Sister” decided to bring all of this together into a single digital product.
The startup team came up with an idea and some initial hypotheses—the challenge was to turn this into a working product for iOS and Android, with a short time-to-market and the ability to quickly change the marketplace logic as hypotheses were tested on real customers.
We chose Flutter for its single codebase and fast iteration speed. We designed two user flows: for the customer—a request creation wizard, a feed of responses, and the ability to sort by rating and price; for the service provider — a profile, a feed of available requests, and a response with a price. On the backend ;— Node.js with matching logic, push notifications, and a role-based model. Communication between parties was moved to WhatsApp—an intuitive channel that doesn’t require support.
The app has passed moderation on both app stores and has been launched in production. Updates are released regularly with new features—for example, a dynamic display of the steps involved in creating a request and new fields (self-service, assistance, desired price). The startup has a working digital channel that scales across cities without requiring rewriting.
The six key screens of the app that both the customer and the service provider navigate through. From the initial browse through the catalog to the completion of the order.
The home screen displays active requests and a list of all available services: injections (intravenous/intramuscular), IV drips, care for bedridden patients, massage for various age groups, wound dressings, and cupping therapy. At the top—the current city and profile avatar.
Seven steps with a progress bar: select a procedure, enter patient details (gender, age, weight, height), health conditions, address, date and time, and course duration. The steps are displayed dynamically based on the selected service.
A profile page featuring the specialist’s photo, age, education, and work experience. A detailed description of their specialization, client reviews, and a “Select Specialist” button at the bottom. The client sees who they are entrusting the health of their loved ones to.
After a request is posted, service providers submit their proposals: their name, a brief comment, and a price. The customer compares them all on a single screen and chooses the best fit—based on price, experience, and availability at the desired time.
The specialist views the request with details: procedure type, patient information, address, and time. They specify their price range (e.g., 200–500₽), can select the recommended price, and add a comment. One tap—and the response is sent to the client.
Once the client has selected a provider — contact details appear: patient's name, phone number, and a link to WhatsApp with a single click. After the visit—a large green “Service Provided” button: the cycle is closed, and the rating rises.
Active customer requests, city selection, active contractor responses — supporting screens that keep the workflow organized.
The app is available on the App Store and RuStore—download it to see how a two-sided marketplace works in a live product.