Qt, LVGL or Android? Choosing a GUI Framework for Embedded Devices (2026)

Key takeaway: there is no "best" GUI framework — only one that matches your hardware, team and licensing budget. Answer three questions first: how big is the screen, do you need fluid animation, and how many units will ship. Small instrument displays almost always suit LVGL; desktop-class cross-platform UIs suit Qt; if you need the app ecosystem and ready-made components, take Android and accept the storage, memory and maintenance cost; a local web UI suits management-style devices with simple screens and remote access.

1. Four dimensions of selection

Dimension	Question to answer	Common mistake
Resources & performance	How much RAM? Any GPU? 60 fps animation or static pages?	Running a heavy framework on a GPU-less platform
Development efficiency	What does the team know? Are there design mocks and motion specs?	Picking a framework nobody knows to save licence fees
Ecosystem & talent	Widget libraries, docs, hiring difficulty, community activity	A niche framework nobody can maintain later
Licensing & compliance	GPL/LGPL/commercial terms, patents, unit volumes	Commercial licence costs discovered just before mass production

Volume has the largest effect on licensing cost: a scheme fine for small pilots may be unworkable at a hundred thousand units. Settle licensing up front, not at the end.

2. Qt: desktop-class capability, an embedded workhorse

• Capability: a full widget system, graphics-view framework, animation and shaders (Qt Quick), threading, networking and serial — a good fit for industrial HMI, test equipment and medical terminals where the UI is complex and logic-heavy;
• Footprint: typically hundreds of MB of RAM on Linux, suited to 1 GB+ RK3568/RK3576/RK3588 platforms. Software rendering works without a GPU but limits animation;
• Licensing: dynamically linking under LGPL terms is free for commercial use provided obligations are met; static linking, certain modules or keeping changes private require a commercial licence. A legal review before mass production costs far less than a retrofit;
• Efficiency: C++ core, with QML for fast motion work. Qt engineers are reasonably easy to hire — a major reason industry keeps choosing it;
• Note: licence terms differ between Qt versions; confirm the licensing model of the version you lock.

3. LVGL: the workhorse for small, light UIs

• Positioning: pure C, MIT-licensed, no mandatory dependencies; runs on MCUs and on lightweight Linux alike;
• Footprint: tens to hundreds of KB of RAM, decent animation without a GPU — ideal for gauges, sensor terminals and battery devices;
• Efficiency: C API with a rich widget set (lists, charts, keyboards) and a PC simulator for development. Complex motion and video playback are not its strengths;
• Linux display stack: outputs via DRM/fbdev backends, input via evdev, easy Buildroot integration, fast boot and few dependencies — a natural match for the boot-time goals in Boot Time Optimisation;
• Note: complex layouts and internationalisation need in-house scaffolding; validate CJK font memory costs early.

4. Android: the strongest ecosystem, the largest bill

• Capability: ready-made UI components, app ecosystem, multimedia and mature tooling — good for advertising displays, POS, education terminals where UIs are rich and iterations fast;
• Cost: demands storage and memory (2 GB+ typically), boots slowly, and system trimming plus security updates are a real maintenance burden — the system-level cost is discussed in Embedded OS Selection;
• Customisation: changing system UI (hiding the status bar, boot animation, preinstalls) means touching AOSP, and every chip SDK upgrade re-merges those patches — an ongoing hidden cost;
• Licensing: AOSP is open source; Google Mobile Services requires certification. Most industrial terminals do not need GMS and run plain AOSP;
• Note: for vertical devices the point of Android is "maintainable after trimming", not "feature-complete".

5. Local web: the shortcut for management UIs

• Shape: a lightweight HTTP service on the device, UI written in HTML/JS, accessed by a local browser or bundled Chromium;
• Strengths: fast development, cross-platform, UI changes without firmware updates, and natural remote management — how gateway and monitoring-station admin pages are usually built;
• Limits: unsuitable for rich local interaction or hard real-time refresh; Chromium itself is heavy on GPU-less platforms; offline use needs local asset packaging;
• Security: the admin page is a network-facing surface — authentication, HTTPS and default passwords must be handled, the same issues as the hardening in Embedded Device Security Hardening;
• Hybrid: many products pair "LVGL/Qt for local operation + web for remote management", each doing what it does best.

6. Side-by-side comparison

Dimension	LVGL	Qt	Android	Local web
Memory	Very low (100 KB class)	Medium (hundreds of MB)	High (2 GB+)	Low–medium (browser dependent)
Animation	Lightweight	Strong (better with GPU)	Strongest	Moderate
Language	C	C++ / QML	Java / Kotlin	HTML / JS
Licence	MIT	LGPL / commercial	AOSP open source	Your own
Typical use	Gauges, small terminals	Industrial HMI, medical	Digital signage, POS	Gateway admin pages

7. The rendering pipeline: where frame rates die

• Display stack: on Linux use DRM/KMS and confirm the right backend plugin (DRM vs fbdev); dual-screen configuration is covered in RK3588 Display and Dual-Screen;
• GPU acceleration: the RK3588 has a GPU that Qt Quick and Android can use; LVGL renders on CPU, optionally with ARM 2D or dedicated backends;
• Diagnosis: measure render time and present time separately. The classic problem is full-screen repaint every frame — fix with dirty rectangles and layered rendering;
• Touch chain: evdev event mapping into the framework, multi-touch calibration, and wet/gloved-hand behaviour must be tested on real hardware;
• Tearing: confirm double buffering and v-sync — easy to miss with software rendering.

8. Localisation and resolution adaptation

• Languages: CJK fonts are large; LVGL projects need font subsetting. Qt and Android have mature i18n mechanisms — the cost is mostly in the translation workflow;
• Resolutions: one product line often ships 4/7/10-inch panels. LVGL uses layouts and scaling, Qt anchored layouts, Android dp and qualifiers. Check how well each supports "one codebase, many screens";
• Orientation: landscape, portrait and mounted-upside-down variants must be settled early — they touch both the display stack and the framework;
• Environment: outdoor high-brightness panels and night dimming are product requirements, but they influence display selection (brightness range and interface).

9. Common pitfalls

• Choosing the framework before the hardware. Do it the other way — set the performance and memory budget first;
• Treating demo frame rates as production frame rates. Demos run alone; production adds business logic, networking and storage. Test under real load;
• Ignoring licence obligations. Statically linking LGPL code or not releasing GPL modifications is a compliance risk discovered after shipment;
• Coupling UI to business logic. Network and business callbacks painting the UI directly cause both jank and crashes — separate model and view;
• Underestimating Android customisation. "Just install an app" turns into system trimming, upgrade management and hardening — a much larger long-term investment.

10. FAQ

• Q1: 7-inch panel, RK3568, fluid animation needed — what to pick? Both Qt and LVGL run on that hardware. Logic-heavy, complex UIs favour Qt; resource footprint and boot speed favour LVGL. Prototype one screen and measure before deciding.
• Q2: What does a Qt commercial licence cost? It depends on company size and product lines — ask Qt Company for a quote. Dynamic linking under LGPL terms can be free, but the compliance review is not optional.
• Q3: Can LVGL run on RK3588? Yes, but it underuses the silicon. LVGL suits mid/low-end platforms; on RK3588 you would usually take Qt or Android, or a hybrid with a self-rendered video layer.
• Q4: Will the UI need redesigns? Almost certainly. Factor redesign cost into selection: web is fastest to change, Qt/QML and Android sit in the middle, plain-C LVGL is the most labour-intensive.
• Q5: Can you help select and port? Yes. Hongyin Technology covers framework selection, BSP display and touch adaptation, UI framework porting and performance tuning in custom projects, with measured frame-rate and memory data on delivery. Send your screen size, UI requirements and target platform for advice within 48 hours.

11. Related solutions & contact

Related solutions: Industrial HMI Upgrade, CNC Machine Tool HMI, Digital Signage & Advertising Display. Further reading: Embedded OS Selection, RK3588 Display and Dual-Screen, Boot Time Optimisation.

Shenzhen Hongyin Technology Co., Ltd. (HONGYIN TECH) provides embedded project customization on RK3588/RK3576/RK3568 platforms — free requirement review, engineer-direct communication and low-volume ordering. Send your requirement list and receive selection advice and quotes within 48 hours.
phone +86 13728726926 | email sales@hoyin-tech.com | website www.hoyin-tech.com | address: Room 301, Building A, Fanrong Science Park, Sanwei Community, Hangcheng Street, Bao'an District, Shenzhen, China.