Core by RTI vs K&S Jump
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Core by RTI
This app serves as a comprehensive resource for figure skating, offering video demonstrations, tutorials, and diagrams. It's designed to support skaters, coaches, and parents in their figure skating journey, from beginner to advanced levels.
- Video demonstrations
- Tutorials
- Diagrams
- Resource center
- Skater guidance
- Coach support
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Welcome to C.O.R.E by RTI - the Collaborative Online Resource Center! C.O.R.E. was designed from the ground up as an affordable complement to professional figure skating instruction! Whether you're a coach, skater, or parent, C.O.R.E. has everything you need to guide your skater from their first steps on the ice to become the figure skater they want to be! This is the ultimate resource, including tons of video demos, tutorials, diagrams and so much more! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
K&S Jump
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Kiss & Score is a practice tool for analyzing figure skating jump videos. Jump analysis is free with no usage limit. Select a video from your library or record one directly, and the app shows rotation count, air time, estimated height, and landing in a single view. All analysis runs on the user's device. Videos are not transmitted externally by default; a video is sent only when the user attaches one while reporting an analysis error and consents to it. The app does not collect information such as school names or real names. Key features · Jump video analysis — unlimited and free · Analysis history — up to 5 saved on the free tier (delete existing records to save more) · Recording guide — how to film for better measurement accuracy · Skeleton (pose) view — review posture as skeletal lines and manually correct detection results · Measurements are estimates and may differ from official scoring results. Pro subscription (optional) · Unlimited saves, and comparison with earlier videos to track change across a season · Auto-renews and can be cancelled at any time. · No account is needed for anything — including Pro purchases. Signing in is optional, only to use Pro on your other devices and in the score sheet app. The app serves no ads, minimizes the data it collects, and is designed so that users can delete all of their data at any time. Terms of Use: https://kissnscore.com/app/terms Privacy Policy: https://kissnscore.com/app/privacy
Screenshots
Verdict
The clearest difference is update cadence: K&S Jump at weekly against Core by RTI's every 3 weeks. K&S Jump also leads on iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support 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. Core by RTI sells 2 in-app purchases, starting at $8.99 per month and K&S Jump sells 3 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.
Core by RTI ships an update every 3 weeks, K&S Jump weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Core by RTI | K&S Jump |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 595 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Mark Fitzgerald | Wonseok Woo |
In-app purchases
Core by RTI
- Core by RTI$8.991 Month
- Core by RTI$89.991 Year
K&S Jump
- Pro Monthly$11.991 Month
- Pro Yearly$119.991 Year
- Launch Lifetime Pro$19.99








