Desktop app development company for macOS and Windows
JEEKSSHIRE 24 is a desktop app development company building software for macOS and Windows that installs on a computer, works with local files and updates itself. We take the product through the full cycle, from task analysis and interface to installers, code signing, notarization, auto-update and support. Our own products, Wallet and Legal, have Mac and Windows versions next to the web version, so we walk the whole desktop release path ourselves.
Desktop application development services we provide
We build computer software that solves a specific work task rather than repeating a website in a separate window.
- macOS app development: native or with a shared codebase
- Windows app development for custom business needs
- Cross-platform desktop apps with one codebase for Mac and Windows
- Desktop versions of a web service or customer portal
- Document tools: PDF, DOCX, text recognition, signatures and export
- Staff workstations: records, file processing, links to the CRM and warehouse
- Apps with an AI assistant that works with the user's files, see AI agent development
If the product also needs a mobile version, it can be built in the same project: see mobile app development for iOS and Android.
When a business needs desktop software rather than a website
A web app is easier to distribute and is enough for many tasks, as described on our web application development page. Desktop software wins in other cases:
- Work with local files and folders: documents, scans, exports, large archives
- Data must not leave the computer, for example confidential documents
- Staff use the program all day and value shortcuts, the system menu and fast launch
- Offline work or an unstable connection
- Connections to printers, scanners and other hardware
If you are unsure whether you need your own software at all, read our guide on custom vs off-the-shelf software.
Electron vs native desktop app for macOS and Windows
A native app is written for each system with its own tools, for example Swift for macOS. Cross-platform desktop frameworks such as Electron keep one codebase for Mac and Windows and reuse the web interface. Our rule is simple: one codebase where it pays off, a native build where speed matters.
| Native | Cross-platform (e.g. Electron) | |
|---|---|---|
| Codebase | Separate for macOS and Windows | One for both systems |
| Speed and memory | Best results | Higher memory use, usually enough for business tasks |
| Look and behaviour | Fully native to the system | One interface on both systems |
| Reuse of the web version | Minimal | High if a web interface already exists |
| When to choose | Heavy computation, deep system integration | The product has a web version and needs both systems fast |
We make the choice during estimation and explain it in terms of your task, so you can challenge it on the merits.
Desktop app development process
- Task analysis: what people do on their computers today and where time is lost. A short brief is enough; see our guide on writing a software requirements document.
- Solution and estimate: platforms, native or cross-platform build, and parts that can be shown and checked one by one.
- Interface and architecture: windows, menus, file handling, data storage and the link to the server.
- Building in parts: you see working features along the way and can reorder priorities.
- Checks and release: build, lint and tests pass before anything ships; a red gate means no release.
- Installers, signing, notarization and the auto-update channel.
- Monitoring and growth: failure alerts, backups and the next versions.
A standalone app usually takes from several months; we ship the first version with the core scenario earlier. Our guide on the software development timeline explains how the schedule forms.
Installers, code signing, notarization and auto-update
Users should not see a system warning about an unknown developer or download every new version by hand. That is why release is part of development, not a last-day task.
- Installers for macOS and Windows in the formats each system expects
- Code signing with a developer certificate on both systems
- Notarization for macOS so the app opens without warnings
- Auto-update: the app finds a new version and installs it itself
- Updates ship only after a green build and test run
Files, hardware, offline mode and data security
Desktop software sits close to user data, so the security bar is higher. We build it in from the first commit: every incoming field is validated, secrets are kept out of the code, permissions are minimal. Data does not travel where it has no business going: in our Legal product, text recognition runs right on the user's device and a document does not have to leave the computer.
The app can work with files and folders, store data locally and sync with the server once a connection is back. Connections to your API, database, CRM or warehouse are designed at the architecture stage. If several systems need to talk to each other, see business process automation.
What the client gets
- Signed installers for macOS and Windows and a working auto-update
- Source code and the rights to it, with terms fixed in the contract before work starts
- A description of how the product is built and how to compile, sign and release it
- Failure alerts and backups for the server side
- Support and further development by agreement, see software maintenance and support
Before acceptance, go through our software project handover checklist.
Our example: Wallet and Legal for Mac and Windows
We run more than ten of our own products in production, written, released and maintained by this same team. Two of them are public, and both have desktop versions.
- Wallet is a wallet for paying for foreign digital services: catalog, balance, order history and refunds in one interface on Mac, Windows and in the browser, in four languages including Arabic.
- Legal is an AI document editor: PDF and DOCX, text recognition from images and screenshots, signatures and export, with Mac and Windows versions next to the web version and an interface in 184 languages.
- The JEEKSSHIRE 24 website hosts the Wallet and Legal landing pages with macOS and Windows downloads and a web version.
Your app follows the same path: releases only from a green state of checks. Read more on the custom software development page, or describe your task in the request form.
Frequently asked questions
Native or Electron: which should I choose?
If the product already has a web version and needs both systems quickly, a cross-platform build often pays off. For heavy computation and deep system integration, native is better.
Can one codebase cover macOS and Windows?
Yes, a cross-platform approach keeps shared code for both systems. Some parts, such as system-specific features, are still written for each platform.
Does a macOS app need notarization?
For distribution outside the App Store, yes: without signing and notarization macOS warns the user or blocks the app. We handle signing and notarization.
How does auto-update work?
The app checks for a new version, downloads it and installs it without manual steps from the user. Updates ship only after all checks pass.
Will the app work offline?
Yes, if the architecture provides for it: data is stored locally and synced with the server when a connection is available. We decide what must work offline during task analysis.
Can you move our web service to desktop?
Yes. The web interface often becomes the base of the desktop app, with file handling, a system menu, an installer and auto-update added on top.
How much does desktop app development cost?
The price depends on scope and timeline: platforms, features, integrations and data requirements. We do not publish a price list; we give an estimate and a step-by-step plan after analysing the task.
Who owns the code, and what about support after release?
The client owns the code and the rights to it, as fixed in the contract. After release we agree on support: updates for new system versions, fixes and further development.