Mobile apps · Prague
Tolaron is a Prague venture studio focused on mobile apps. We build digital products around the app: iOS and Android in React Native, Expo and TypeScript, and the web apps that go with them. For a product you already have, we build on your API and leave the product as it is. The scope is agreed in writing, and the person you talk to is the person who builds.
Your product starts as a mobile app. We design and build the digital product around it: the iOS and Android app and the web app for your team or your customers.
Best fit: a new product your customers will use mainly on their phones.
Your product already works. We build its iOS and Android app on your API, and a web app or dashboard if your team needs one. Your product stays as it is.
Best fit: you have a working API and someone on your side who can change the backend.
We know payments, onboarding and KYC from the inside. We build apps that stand up to the regulator and to the customer who relies on them every day.
Sensitive data, procurement rules and people with no time for software. It has to be simple, and it has to be up.
Services, logistics, manufacturing. The value is in the systems you already run. The missing piece is the interface.
Dashboards and operational functionality on the client's backend. Design, UX/UI, build and long-term maintenance.
Case study
Business and identity verification (KYB, KYC) and the workflows around it, for European companies.
Case study
Offline-first field operations software for service companies whose technicians work on site. Medical equipment is the first industry.
Case study
We agree what will be delivered before we start, and we are accountable for delivering it.
We build on the API you have. When it needs to change, we work with the person on your side who can change it.
Senior people do the work. The person you talk to is the person who designs and builds.
We bill the time we actually work, under a cap agreed up front. When something changes, you decide before we spend more.
Apps live in app stores, and systems change underneath them. We maintain what we ship.
We build things that last.
We turn complexity into opportunity.
We execute with intent.
We move ideas into reality.
Zdeněk Dolák
Founder
Zdeněk Dolák leads every project personally, from the first conversation to delivery.
One FCA-authorised UK payment institution, two roles. First, merchant onboarding in the app: identity verification, commercial terms and e-signed agreements, without paperwork or a sales call. Then the card-payments app in React Native for iOS and Android, used by more than three thousand merchants: from architecture to store release, leading two to three engineers.
Case study: payments app ↗Case study: KYC onboarding ↗
First years in fintech, on the payment-gateway side. Guided hundreds of Czech and Slovak partners through payment integrations, from API workflows and testing to troubleshooting in live traffic. That is where he learned how payments work under the hood and what merchants expect from a payment tool.
A project in Southeast Asia: marketing site and campaign pages for a brand's expansion, with AI in the content pipeline.
The founder's own work, presented as personal experience, not as Tolaron engagements. Client names are withheld by agreement. More on sidneydolak.com
Scope, dependencies and the practical details of working together.
Tell us who will use the app, what they need to do and which system it should connect to. Include the current app or API if one exists, your priorities and any timing constraints. Please do not send credentials or customer data.
We estimate against an agreed scope and bill actual work under an agreed budget cap. Cost depends on the user journeys, design, API readiness, integrations and testing. Changes that need more budget require agreement before the extra work.
For an app on a product you already have, the best start is a working API and someone on your side who can change it. For a new product built around the app, what it needs on the server side is agreed as part of the scope. Backend development is not a standard service: where a project needs it, we discuss it for that project.
The scope, responsibilities, dependencies, acceptance criteria and estimate. Code ownership, store accounts, release responsibilities and maintenance terms also need to be settled in the project agreement.
Tolaron is founder-led. Zdeněk Dolák is your contact for the project. We deliver an agreed product scope rather than sell developer capacity.
We serve Czech and international clients in Czech and English from Prague. Tell us where your team works so we can agree communication, decision-makers and meeting times.
Something else? Write to hello@tolaron.com or book a call.
What you are building, what it should connect to, and when you need it. Tell us your priorities and the best way to reach you.
