Comparison

AI CometStack vs ScopeLog

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AI CometStack

Features
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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

About

ScopeLog

Features
Read full description

Is tonight worth setting up the rig? ScopeLog gives you one clear answer. Unlike the fragmented tools astrophotographers juggle, ScopeLog blends cloud cover (Apple Weather), the Moon (altitude, phase and separation from your target), target altitude and light pollution into a single Imaging Go/No-Go verdict — plus the optimal imaging window for the night. FEATURES • Tonight's Go/No-Go verdict with the best window and clear reasons • Deep-sky catalog (Messier + bright NGC/IC) with nightly altitude curves • Observing sites on a map, with automatic or manual Bortle • Session logbook with stats and shareable cards • Gear & maintenance reminders (collimation, polar alignment, sensor cleaning) • Live Activity: session timer, target altitude, meridian-flip countdown • Red Night Vision mode to protect your dark adaptation • Private by design — data syncs through your own iCloud; nothing is collected PRO Multiple sites, unlimited targets and lists, statistics & Share cards, maintenance reminders and session Live Activities. Monthly, yearly (with a free trial) or a one-time lifetime unlock. Built Apple-first for iPhone. Clear skies! Weather by Apple Weather. Deep-sky data: OpenNGC (CC BY-SA). Try Pro free for 7 days. Cancel anytime. SUBSCRIPTION TERMS Pro is available as an auto-renewable subscription (monthly or annual). Length and price are shown in the app prior to purchase. Payment is charged to your Apple ID upon confirmation. The subscription renews automatically at the same price unless cancelled at least 24 hours before the end of the current period. Renewal is charged within 24 hours prior to the end of the current period. You can manage and cancel your subscription in your Apple ID account settings after purchase. Any unused portion of a free trial period is forfeited when purchasing a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

AI CometStack2 screens
ScopeLog4 screens

Verdict

The call

AI CometStack and ScopeLog are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. AI CometStack sells 1 in-app purchase, starting at $9.99 per year and ScopeLog sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
AI CometStack versus ScopeLog: the parameters behind the verdict, then further details
ParameterAI CometStackScopeLog
PriceFreeFree
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size105 MB4 MB
Age rating4+4+
Developeryong chong lohGiulio Fontana

In-app purchases

1 purchases

AI CometStack

Subscriptions1
  • Yearly Subscription$9.991 Year
3 purchases

ScopeLog

Subscriptions2
  • PRO Monthly Plan7 Days trial$3.991 Month
  • Pro Yearly$24.991 Year
One-time1
  • Pro Lifetime$44.99

Questions

Is AI CometStack free?
AI CometStack is free to download, with in-app purchases available.
Is ScopeLog free?
ScopeLog is free to download, with in-app purchases available.
Do AI CometStack or ScopeLog have ads?
Neither AI CometStack nor ScopeLog shows ads.

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