Core by RTI vs Grand Rhythmics
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/
Grand Rhythmics
Manage your gymnastics academy account, register for classes and events, and receive important updates. Access all academy offerings conveniently from your smartphone.
- Account management
- Class registration
- Event registration
- Receive notifications
- On-the-go access
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WELCOME TO Grand Rhythmic Gymnastics Academy! The Grand Rhythmics app allows you to manage your account with ease, register for classes and special events. You'll also receive important notifications about class changes, closings, registration openings, special announcements, and upcoming events. The Grand Rhythmics app is an easy-to-use, on-the-go way to access everything Grand Rhythmics Gymnastics has to offer right from your smartphone.
Screenshots
Verdict
The clearest difference is in-app purchases: Grand Rhythmics at none against Core by RTI's 2. Grand Rhythmics also leads on iOS requirement (15.0 vs 17.6). Core by RTI's advantage is update cadence (every 3 weeks vs every 6 months). On price, rating, ratings volume and ads 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. Grand Rhythmics asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Core by RTI against 5.0 for Grand Rhythmics. Both are backed by a comparable volume of ratings — 4 and 2 respectively.
Core by RTI ships an update every 3 weeks, Grand Rhythmics every 6 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Core by RTI | Grand Rhythmics |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 595 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Mark Fitzgerald | Grand Rhythmic Gymnastics Academy |
Customer experience
Core by RTI
Grand Rhythmics
In-app purchases
Core by RTI
- Core by RTI$8.991 Month
- Core by RTI$89.991 Year
Grand Rhythmics
No in-app purchases
