RoboTou Stacker vs AstroFinish
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RoboTou Stacker
Combine multiple photos directly on your device for enhanced results. This app offers automatic masking and alignment for various photography needs, including starry skies and light trails. Process your images locally without needing an account or cloud sync.
- On-device image stacking
- Automatic masking and alignment
- Starry sky stacking
- Star trail stacking
- Car-light trail stacking
- Local preview generation
- Export to Photos
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RoboTou Stacker brings precision image stacking and on-device AI star removal to iPhone and iPad. Choose a workflow for your photography: • Starry Sky Stack — Align and combine night-sky photos for cleaner, more detailed results. • Landscape Stack — Reduce noise and improve landscape images through multi-frame stacking. • Star & Light Trails — Create star-trail and car-light-trail images. • Star Trail Pro — Produce advanced star-trail results with additional processing options. • AI Star Removal — Remove stars from a single image using an on-device Core ML model. KEY FEATURES • Import images from Photos or Files • Automatic masking and image alignment • 4K and 1080p output resolution options • Local preview generation and project management • Export finished images back to Photos • On-device processing—your source images do not need to be uploaded ROBOTOU PRO Landscape Stack and Star & Light Trails remain available for free. RoboTou Pro unlocks Starry Sky Stack, Star Trail Pro, and AI Star Removal through an annual subscription or a one-time lifetime purchase. Privacy Policy: https://www.robotou.cn/robotou-stacker-ios-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
AstroFinish
Edit astrophotography images directly on your iPhone. Enhance deep-sky objects, clean up skies, and sharpen moon shots with specialized tools. Supports various image formats and offers batch processing for efficient editing.
- Auto Astro Polish
- Deep Sky enhancement
- Moon sharpening
- Nebula and galaxy detail
- Denoise and star reduction
- Batch processing
- RAW and FITS support
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AstroFinish is a darkroom for astrophotography on iPhone. It is built for the shots that come off smart telescopes, backyard rigs, and late-night moon sessions: the ones that are almost there, but need a cleaner sky and a better finish. Start fast with Auto Astro Polish, Deep Sky, Moon Sharp, and other built-in looks. Or dial it in by hand with controls made for space photos, including black point, glow cleanup, nebula reveal, galaxy detail, denoise, star reduction, and moon sharpening. Import from Photos or Files, work with JPEG, PNG, HEIC, TIFF, RAW-style images, and FITS sessions, then export finished images or shareable before/after cards. Batch Finish helps run one look across a queue when you came home with more than one keeper. AstroFinish stays local. No account. No cloud upload. No tracking SDKs. Your captures stay on your iPhone unless you choose to share or save them. Built for: Smart telescope captures Deep-sky photos, nebulae, galaxies, star fields, and moon shots Quick fixes when the sky glow gets rude Manual finishing when you want the last word FITS reveal and stack workflows Local exports, share sheets, and before/after cards AstroFinish is for people who would rather be outside collecting photons than fighting a desktop editor at 1 a.m.
Screenshots
Verdict
The clearest difference is in-app purchases: AstroFinish at none against RoboTou Stacker's 2. AstroFinish also leads on ratings volume (4 vs 1). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. RoboTou Stacker sells 2 in-app purchases, starting at $5.00 per year. AstroFinish asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for RoboTou Stacker against 5.0 for AstroFinish. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
RoboTou Stacker ships an update every 5 days, AstroFinish every 4 days. The most recent releases landed on September 10, 2026 and September 3, 2026 respectively.
| Parameter | RoboTou Stacker | AstroFinish |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 5 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 88 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 振国 吴 | Cody Adams |
Customer experience
RoboTou Stacker
AstroFinish
In-app purchases
RoboTou Stacker
- RoboTou Stacker Pro Annual$5.001 Year
- RoboTou Stacker Pro Lifetime$39.99
AstroFinish
No in-app purchases





