Upscaler review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Upscaler is an open-source Android application for enlarging and sharpening low-resolution images with neural-network-based AI upscaling. It uses the MNN deep-learning framework and a pretrained Real-ESRGAN model, processing image tiles on the device GPU before merging them into a higher-resolution result. The application is aimed at Android users who want free, local image enhancement rather than a browser-based or desktop workflow. Android 7 or later is required, along with Vulkan or OpenCL support.

The published project materials show a focused feature set for image enlargement. Upscaler includes generic and drawing upscaling modes, tiled image processing and merging, and GPU acceleration through Vulkan or OpenCL. Its scale setting is recorded as custom; the repository README benchmarks 16x modes, while the category scale options stop at 8x. This gives the application room for different enlargement workflows, but the practical result depends on the Android device and supported graphics API.

Upscaler is distributed through the project’s GitHub repository and release APKs, with no paid tier described. The main workflow limitation is batch processing: it appears on the README TODO list, so the current workflow is oriented toward processing images individually. Choose Upscaler if Android compatibility, open-source availability, local GPU processing, and Real-ESRGAN matter most. Choose an alternative if you need desktop or multi-platform support, built-in batch handling, or a broader workflow around multiple images.

Upscaler pros and cons

• Where it wins
  • Runs Real-ESRGAN upscaling locally with GPU acceleration
  • Supports tiled processing, merging, and drawing modes
  • Offers Vulkan or OpenCL support on Android 7 or later
• Where it doesn't
  • Android-only platform support
  • No batch processing for multiple images
  • Requires Vulkan or OpenCL support

Upscaler fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update