SpotOn Grading System Comic Ed vs Rocket Calculator

SpotOn Grading Systems, or SGS, is a series of short, multiple choice questions enabling you to grade your comic books on-the-spot and accurately, within seconds. SGS grades are comparable to the third party grading companies such as CGC, CBCS, etc. Some of the highlights of the app are: • All books you've graded are kept in a list on your account allowing you to review your past books and grades. • You’ll have an idea whether your book would receive a Qualified or Restored label. • Multiple choice questions are simple and easy follow and are broken down into different categories of the book’s areas. • Answers are simple and have examples of everyday items to use as examples of size comparison. • A YouTube video tutorial is available to teach you situations and examples you wouldn’t normally have standard knowledge of. Unlimited Grading for One Year: The subscription fee for unlimited comic book gradings for 1 year will be $14.99/year. If you decide to subscribe, payment will be charged to your iTunes Account upon confirming your purchase. The $14.99/year subscription fee will automatically renew unless auto-renew is turned off in your App Store Account Settings. To avoid being billed for a subsequent year, you must turn off auto-renewal at least 24-hours before the end of the current period. You can manage your subscription by going to your App Store Account Settings after purchase. If you decide to leave auto-renewal on, you will be charged $14.99/year for renewing your subscription to unlimited grading within 24-hours prior to the end of the current period. Any unused portion of your free grading trial will be forfeited when you purchase a subscription. Privacy Policy: http://fenixflamecomics.com/privacy/ Terms of Service: http://fenixflamecomics.com/tos/ Video Tutorial: https://www.youtube.com/watch?v=EOA0949K0-8

ApogeeField is an offline flight calculator for low and mid-power model rocketry. Enter your rocket (dry mass, body diameter, drag coefficient, launch-guide length) and pick a motor, and it predicts your apogee, the best ejection delay, max velocity, and rail-exit velocity right at the pad — with no signal, no account, and no tracking. WHAT IT DOES - Apogee, max velocity and full altitude / velocity / acceleration flight curves — free. - Recommended ejection delay: ideal coast time mapped to the nearest delay you can actually buy, with the offset in seconds. - Rail-exit velocity with a configurable safety threshold, so you can judge whether the rocket will leave the rail under control. - Compare motors side by side and export your flight card and saved rockets. - Built-in motor database (thrust curves and certified statistics) plus import of your own .eng / .rse files. - Switch freely between metric and imperial units. HOW THE MODEL WORKS (and its limits) ApogeeField runs a deterministic 1-DOF (vertical, point-mass, with launch-angle cosine) flight integration: thrust-curve integration, variable-mass burn (propellant mass is subtracted as impulse is consumed), quadratic drag, and an ISA standard-atmosphere density model, coasting to apogee at the velocity zero-crossing. Every assumption is shown on the results screen so you can line your inputs up against OpenRocket or your own altimeter data. It is an engineering estimate for hobby use — a starting point, not a guarantee. The model does not account for wind, airframe stability, roll, or weathercocking, so real flights will differ. Always verify with an altimeter. This is not a safety, airworthiness, or legal document, and it does not replace the NAR / Tripoli safety code or local airspace rules — follow them. PRIVACY & PRICING 100% offline. No account, no network requests, no analytics, no ads. Your rockets and imported motor files stay on your device. One-time unlock — no subscription. Motor data are numerical facts drawn from publicly submitted thrust-curve files and NAR / Tripoli / CAR certification statistics, stored in our own format with the source and database version shown in the app.