Eagle Image Stacker vs RoboTou Stacker

Eagle Image Stacker is a local-first astronomy imaging toolkit for iPhone. Import or capture RAW, DNG, ProRAW, JPEG, HEIF, TIFF, and other supported image files, then align, calibrate, stack, inspect, and export high-quality results. Use Astro Mode for star fields, galaxies, nebulae, and deep-sky sequences. Use Planets Mode for Moon and planet workflows with ROI tracking and alignment tools. RAW Converter helps inspect and export camera files, while calibration tools support dark frames, flat fields, hot-pixel review, masks, and alignment analysis. The app is built for on-device processing. Your selected images and generated outputs remain local unless you choose to save, export, or share them through iOS. Some capture features depend on your iPhone hardware. RAW and Apple ProRAW availability varies by device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Subscription Terms: https://sites.google.com/view/eis-subscription-terms/ Privacy Policy: https://sites.google.com/view/eagle-image-stacker-privacy2/

Bring image stacking and AI star removal to your iPhone and iPad. RoboTou Stacker gives night-sky and landscape photographers practical tools for processing photos directly on their devices. Import images from Photos, Files, or a folder, choose a processing mode, preview the result, and save it back to Photos. Image processing runs locally, with no account registration or photo uploads required. CHOOSE YOUR WORKFLOW • Starry Sky Stack: Automatically generate a sky mask, align the stars, and process the sky and foreground separately. • Landscape Stack: Combine multiple photos of a static scene captured from a fixed position. • Star & Light Trails Stack: Use maximum-value stacking to combine star trails and vehicle light trails. • Star Trail Pro: Stack up to 100 images with a fade-enhanced workflow. • AI Star Removal: Process a single image on your device to create a starless image for further sky-background editing. OUTPUT YOUR WAY Choose a 4K or 1080p output preset while preserving the original aspect ratio. Smaller source images retain their original resolution. Both stacking and AI Star Removal follow your in-app resolution setting. MADE FOR YOUR DEVICE Switch between English and Chinese. Layouts optimized for the unfolded iPhone Duo display make better use of screen space across Home, mode selection, importing, and Settings. FREE FEATURES AND ROBOTOU PRO Landscape Stack and basic Star & Light Trails Stack are free. Starry Sky Stack, Star Trail Pro, and AI Star Removal require RoboTou Pro, available as an auto-renewing annual subscription or a one-time lifetime purchase. Manage or cancel subscriptions in your Apple ID settings. Privacy Policy: https://www.robotou.cn/robotou-stacker-ios-privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/