Robograder vs SK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Robograder
This app uses your phone's camera to analyze comic books and provide a condition grade. It breaks down the grade by specific defects like spine stress and corner wear, helping you make informed decisions about buying, selling, or cataloging your collection.
- Photo-based grading
- Detailed defect breakdown
- Component scores (front, back, spine, interior)
- Page quality assessment
- Collection building and organization
- Pay-as-you-go credit packs
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Robograder grades your comic books from photos in seconds. Snap a few shots of a comic — front, back, spine, interior — and Robograder returns a condition grade on a familiar 0.5–9.9 scale, plus a detailed breakdown of exactly what it sees: spine stress, corner wear, surface defects, page quality, and more, defined by region. Whether you're buying, selling, or just cataloging your collection, Robograder gives you a fast, consistent second opinion before you commit to a costly professional submission. FEATURES • Photo-based grading — no special equipment, just your phone • Component breakdown — separate scores for front, back, spine, and interior • Specific defect notes — know what's affecting the grade and where • Page quality assessment • Build your collection — save and organize every book you grade • Simple credit packs — pay only for the assessments you use, NO SUBSCRIPTIONS Robograder is an independent grading tool and is not affiliated with any professional encapsulation service. Grades are estimates to help you make informed decisions.
SK
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Dive into Derry and beyond! Discover landmarks and maintain your reading lists. SK Tours, the world's leading and most trusted name in Stephen King tourism, turns your phone into a personal guide. Visit King-related sites across the country and learn more about one of history's most influential authors. When you purchase a yearly subscription to the SK Tours app, you'll be able to access the following features. FIND WHAT'S NEARBY Open the interactive map to see curated points of interest. Tap any pin for photos, details, directions, and helpful access notes. ON THIS DAY IN KING HISTORY Check out the On This Day calendar to discover events, milestones, and stories tied to today's date. MAINTAIN YOUR OWN CHECKLIST Your personal checklist keeps your reading and watch lists organized. ALWAYS FRESH New content is added regularly, so there's always something new to discover. Terms of use for the app: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Robograder at every 9 days against SK's every 3 weeks. Robograder also leads on device support (3 vs 1). On price, ads, in-app purchases 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. Robograder sells 3 one-off in-app purchases and SK sells 1 in-app purchase, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.
Robograder ships an update every 9 days, SK every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Robograder | SK |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (18 ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 18 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 19 MB | 95 MB |
| Age rating | 4+ | 12+ |
| Developer | Robograder LLC | SK Tours of Maine |
In-app purchases
Robograder
- Comic Stack$9.99
- Comic Wall$29.99
- Short Box$99.99
SK
- Yearly Subscription$4.991 Year









