Felgo

Felgo is a Qt-based SDK for building mobile, desktop, web and embedded apps, as well as games. It suits developers comfortable with QML or JavaScript who need to target several kinds of devices from one toolkit. Its breadth is a strength, but the license caps and per-developer billing make plan choice important.

Overview

Felgo combines an application toolkit with a 2D game engine and device integrations. QML and JavaScript are its main languages, with C++ also supported. A visual UI designer, emulator or simulator support and app packaging round out the development environment.

Felgo Live applies saved QML and JavaScript changes to connected devices without a separate build and deployment cycle. Browser-based projects can use Felgo Cloud Builds to build and deploy. These tools suit iterative development and distributed workflows, though the paid licenses still carry turnover limits at the lower tiers.

Felgo is made by FELGO GmbH, which lists offices in Vienna and Linz, Austria. It says servers that store information are located in the European Economic Area and that it acts as a GDPR data processor for EEA clients.

Key features

• Cross-platform development: Felgo targets mobile, desktop, web and embedded projects on Qt. This range can help teams maintain varied device targets in one SDK, but the approach is best suited to teams willing to work in its QML- and JavaScript-centered environment.
• Game development: The Felgo Game Engine focuses on casual 2D games, with Box2D physics, particles, multi-touch and animations. Game Network adds cross-platform achievements, leaderboards, challenges, cloud storage and offline support, making it a more complete option for connected game features than a bare engine.
• Plugins and device access: Listed integrations include AdMob, Chartboost, in-app purchases, Facebook, Flurry analytics and Google Firebase. Felgo Apps can access cameras, sensors and file systems, and support WebSockets, Bluetooth LE and NFC—useful for apps that need device capabilities beyond a standard screen interface.
• Cloud workflow: Felgo Cloud IDE projects can be built and deployed through Felgo Cloud Builds in a browser. That gives teams a browser-based route for these steps, alongside the device-connected live reload workflow.

Pricing

Felgo has a free plan and a free trial, with paid plans starting at €79/mo (annual). The free plan gives developers a way to begin without a subscription, but the supplied plan details do not establish its specific caps or included features.

• Personal: Custom pricing, for organizations with annual turnover under €50k.
• Startup: €79 a month (billed billed annually per developer). It covers annual turnover under €100k, one hour of premium support per year, mobile, desktop, web, Raspberry and Arduino platforms, and source code access. The turnover ceiling and annual per-developer billing make it a fit for smaller organizations; the limited support allowance and cap may constrain growing teams.
• Business: €245 a month (billed billed annually), shown alongside €350 per developer/month. It removes the annual turnover cap, includes one hour per month of premium support and services, and covers mobile, desktop, web and embedded platforms with all engine features. It is the clearest fit for organizations that need the full feature set or have outgrown the lower-tier turnover limits, but its recurring per-developer cost is a larger commitment.

Companies can request a free Business evaluation with Business features, up to five hours of professional services and priority support. That provides a way to evaluate the higher tier before committing.

Platforms

Felgo supports Android and iOS for mobile, Windows, macOS and Linux for desktop, and web. Its plan descriptions also name embedded platforms, while Startup specifically includes Raspberry and Arduino. The SDK offers emulator or simulator support and app packaging. Choose it when those broad targets matter; a project focused on one platform may not benefit as much from the range.

Who it's for

Felgo is best suited to developers and teams building Qt-based apps or casual 2D games across several device categories, especially when camera, sensor, connectivity or game-service features are required. Startup is aimed at organizations below €100k annual turnover that can work within its platform and support terms. Business is more appropriate when unlimited turnover, all engine features or monthly premium support matter. It is a weaker fit for teams that want to avoid annual per-developer licensing or do not want to build around QML and JavaScript.

Pros and cons

• Pro: One Qt-based SDK covers apps, games and embedded projects across mobile, desktop and web.
• Pro: Live reload, browser-based cloud builds and device integrations support development beyond basic app screens.
• Pro: Game Network supplies achievements, leaderboards, challenges, cloud storage and offline support for game projects.
• Con: Startup is capped at under €100k annual turnover and provides only one hour of premium support per year.
• Con: Paid plans are billed annually per developer, and Business is substantially more expensive than Startup.

Alternatives

• Mobile Development IDEs is a broader category to explore when comparing mobile development environments.
• Game Engine Software is a broader category for readers prioritizing game development tools.
• Codename One is another freemium option for Android, iOS, desktop and web; its free plan has 100 cloud build credits per month, with iOS builds costing 8 credits each.
• Defold is a free alternative for game projects when avoiding licensing, royalty and runtime fees is the priority.
• Godot Engine is a free, open-source game engine with no contracts or hidden fees.
• B4X is a freemium option with free Android development through B4A, including commercial use.
• DroidScript is a free-to-download alternative with optional paid plugins and donations.
• Monaca offers a free cloud IDE plan with three projects and three remote builds per 24 hours.
• Qt Creator is worth considering for a Qt-focused workflow; its open-source version comes with LGPL/GPL obligations.
• GameMaker is an option for game projects where a free non-commercial plan without console exports is sufficient.

Verdict

Choose Felgo if you want a Qt-based toolkit that spans cross-platform apps, casual 2D games and embedded work, with device access and game services built into the offering. Its range is compelling for teams that can use QML and fit the license terms. Look elsewhere if annual per-developer billing, turnover caps or the Business price outweigh the benefit of that breadth.