AI CometStack vs AstroNight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AI CometStack
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AI CometStack is a breakthrough comet alignment app designed specifically for mobile astrophotography workflows. Overcome the long-standing tradeoff of comet movement during long imaging sessions. Traditionally, you had to choose between sharp stars (streaked comet) or a sharp comet (trailed stars). AI CometStack solves this by eliminating complex desktop compositing and advanced scripting. Core Features Motion-Aware Stacking: Aligns the comet nucleus across time while preserving star geometry. Two-Path Automation: Integrates stars and comets separately, then blends them on-device. Batch Processing: Handles full-night capture sets with uniform parameters. Pro Format Support: Works natively with FITS, RAW, TIFF, PNG, and JPEG files. Mobile-First Flow: Real-time previews and guided steps built for iOS deep-sky sessions. Simple Workflow Import your exposure frames (or use the included sample files). Let the app automatically track and model comet motion. Validate and adjust the seamless background blend in real time. Export gallery-grade, press-ready images instantly from the field. Support & Feedback Questions, feedback, or need help? Contact us directly at ustransit74@gmail.com Privacy policy and term of use (EULA) is at https://deepskycolor.blogspot.com/2018/12/privacy-policy-for-deep-sky-color-app.html
AstroNight
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Clear nights are rare. AstroNight helps you use them well. It tells you what's worth shooting tonight, which settings to start with, and whether your frames are any good while there's still time to fix them. DECIDE WHAT'S WORTH SHOOTING Tell AstroNight your gear: phone, DSLR, mirrorless, tracker or telescope. It works out the astronomical dark window for your date and location, tonight's moon phase and brightness, and your Bortle class. From that it picks one to three targets that suit those conditions, each with a plain-English reason. Anything your gear can't frame, or the moon will wash out, is left off the list. START WITH THE RIGHT SETTINGS Every target comes with starting settings for your setup. A phone doesn't get aperture advice. A wide-field lens doesn't get a deep-sky target it can't frame. SHOOT MANUALLY WITH YOUR PHONE Use the built-in camera to set exposure time, ISO and focus yourself, so long exposures of the night sky are possible without extra gear. Adjust focus manually, apply the starting settings AstroNight suggested for your target, and capture. A self-timer keeps a screen tap from shaking the shot. Shoot longer exposures with your iPhone or iPad. CHECK YOUR SHOTS BEFORE THE NIGHT IS GONE Import a frame mid-session. AstroNight measures vignetting, colour cast, gradient and sharpness from the pixels, then tells you what's wrong while you can still change it. A single frame can't always separate soft focus from star trailing, and the app says so rather than guessing. SEE YOUR PROGRESS Each session is logged with target, settings, conditions and photo. Shoot the same target again and you get a side-by-side comparison. KNOW WHAT'S COMING The built-in calendar covers meteor showers, eclipses and comets. Aurora alerts use live NOAA space weather data. BUILT ON REAL ASTRONOMY Sunset, twilight and astronomical dark times from the same solar equations NOAA uses Moon phase from lunar-cycle calculations Bortle estimate from a 40,000-city light-pollution dataset Aurora probability from NOAA's Space Weather Prediction Center PRIVATE AND OFFLINE Photo analysis runs on your device and your images never leave it. Once installed, the app works offline, so a dead-zone dark-sky site isn't a problem. No ads and no required account. WHO IT'S FOR Beginners get explanations. Experienced shooters get the numbers.
Screenshots
Verdict
The clearest difference is in-app purchases: AstroNight at none against AI CometStack's 1. On price, ads, device support and iOS requirement 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. AI CometStack sells 1 in-app purchase, starting at $9.99 per year. AstroNight asks for nothing beyond the download.
| Parameter | AI CometStack | AstroNight |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 105 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | yong chong loh | DARIA LENSKAJA |
In-app purchases
AI CometStack
- Yearly Subscription$9.991 Year
AstroNight
No in-app purchases
Questions
Is AI CometStack free?
Is AstroNight free?
Do AI CometStack or AstroNight have ads?
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