RoboTou Stacker
On-device image stacking
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Stack night skies, landscapes and light trails on your device. Unlock AI Star Removal with RoboTou Pro. Now optimized for iPhone Duo.
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/
• Optimized for iPhone Duo, with two-column layouts that make better use of the unfolded display.
• Improved mode selection and import-source layouts for clearer cards and text in landscape.
• Refined Settings to clarify Pro features and updated English and Chinese feature descriptions.
The developer, 振国 吴, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RoboTou Pictures (Shenzhen) Co., Ltd
- Size
- 92.1 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- RoboTou Stacker Pro Annual $7.99
- RoboTou Stacker Pro Lifetime $39.99
- Copyright
- © 2026 RoboTou Stacker. All rights reserved.