Need help with one of our apps? You're in the right place. Find answers below or reach us directly.
Email: developer@graceappsai.com
Response time: We aim to reply within 1–2 business days.
For app-specific questions please mention which app you're using (HotScan, Marble Arena, or Marble Clash) and your device model.
AI-powered identifier for 1:64 diecast cars with live market prices.
Tap the camera icon on the home screen, take a clear photo of the car (works best on a flat, well-lit surface), and HotScan will identify the casting, year, and current market value within a few seconds.
Recognition works best for in-focus photos with the full car visible. If the car is heavily damaged, modified, or extremely rare, identification may fail. Try a different angle or lighting and scan again. Pro users can use the Multi-angle Scan for tougher cases.
Prices are pulled from live marketplace listings and reflect what collectors are currently asking. Estimated Value reflects the cluster of realistic listings; the asking range shows where most listings fall.
HotScan doesn't have a free tier. New users get a free 3-day trial to try everything, including Collector Insights. After the trial, HotScan continues as a subscription (monthly or annual), which you can cancel anytime in your App Store or Google Play subscription settings.
Subscriptions are managed through the App Store or Google Play. To cancel, open your device's Subscriptions settings and select HotScan. To restore on a new device, sign in with the same account and tap Profile → Restore Purchases.
Open the app, go to Profile → Delete Account, and confirm. Your account, collection, wishlist, and scan history will be permanently deleted. This action cannot be undone.
Top-down marble football game built around a tournament of 48 nations.
Open the app, pick your nation from the country select grid, and the tournament starts automatically — group stage, then knockout rounds, then the final.
Watch Mode is fully simulated — the marbles play, you spectate. Power-Up Mode lets you bring three power-ups (Enlarge, Freeze, Park the Bus) into each match and trigger them at the right moment to swing the outcome.
Force-close the app and reopen it. If the issue persists, please email us with your device model, OS version, and a screenshot if possible.
Tap Profile → Restore Purchases. If it still doesn't activate within a minute, email us with your App User ID (visible in the app settings) so we can check on our side.
We read every email — send us a screenshot, the moment when it happened, and what you expected.
Plinko-style marble football — pegs deflect every shot, 48 nations battle for the cup.
Marble Clash uses a Plinko-style pitch — shots are deflected by pegs on their way to the goal, making every match feel like a pinball-style chain reaction. Marble Arena uses a circular pitch with direct marble collisions.
Pick your nation from the country select grid and the tournament begins — group stage, then knockouts, then the final.
Force-close the app and reopen it. If the issue persists, please email us with your device model, OS version, and a screenshot.
Tap Profile → Restore Purchases. If it still doesn't activate within a minute, email us with your App User ID so we can check on our side.
Email us with a screenshot and what you expected.