# CORE by Stay Sharp vs SynchroCenter

The clearest difference is in-app purchases: SynchroCenter at none against CORE by Stay Sharp's 2. SynchroCenter also leads on update cadence (every 3 days vs every 4 weeks) and ratings volume (15 vs 4). CORE by Stay Sharp's advantage is device support (4 vs 2). On price, rating, ads and iOS requirement there is nothing between them.

Both are free to download. CORE by Stay Sharp sells 2 in-app purchases, starting at $8.99 per month. SynchroCenter asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for CORE by Stay Sharp against 4.9 for SynchroCenter. Both are backed by a comparable volume of ratings — 4 and 15 respectively.

CORE by Stay Sharp ships an update every 4 weeks, SynchroCenter every 3 days. The most recent releases landed on November 14, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | CORE by Stay Sharp | SynchroCenter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/core-by-stay-sharp/id6450906479/reviews)** | [4.9 (15 ratings)](https://appshunter.io/ios/app/synchrocenter/id6757682928/reviews) |
| Number of ratings | 4 | **15** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Monetization | Subscription | **Free** |
| Size | 608 MB | 5 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | **iPhone, iPad, Mac, Apple TV** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mark Fitzgerald](https://appshunter.io/developer/477164822) | [Franky Sze](https://appshunter.io/developer/1868258574) |

## What reviewers say

### CORE by Stay Sharp

[App page](https://appshunter.io/ios/app/core-by-stay-sharp/id6450906479)

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.

**Highlights:** Video demonstrations, Tutorials, Diagrams, Resource center, Skater guidance, Coach support

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Core by RTI | $8.99 | per month |
| Core by RTI | $89.99 | per year |


### SynchroCenter

[App page](https://appshunter.io/ios/app/synchrocenter/id6757682928)

Your all-in-one synchronized skating companion. Get real-time competition updates, detailed results with scoring breakdowns, and explore teams worldwide. Track your favorite teams for personalized performance insights.

**Highlights:** Real-time competition schedules, Comprehensive results archive, IJS scoring breakdowns, Global team exploration, Favorite team tracking, Personalized updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CORE by Stay Sharp free?

CORE by Stay Sharp is free to download, with in-app purchases available.

### Is SynchroCenter free?

SynchroCenter is free to download, with no in-app purchases.

### Which has better reviews, CORE by Stay Sharp or SynchroCenter?

CORE by Stay Sharp is rated higher. CORE by Stay Sharp averages 5.0 out of 5 from 4 ratings, while SynchroCenter averages 4.9 from 15 ratings.

### Do CORE by Stay Sharp or SynchroCenter have ads?

Neither CORE by Stay Sharp nor SynchroCenter shows ads.

### Which is updated more often, CORE by Stay Sharp or SynchroCenter?

CORE by Stay Sharp ships an update every 4 weeks, and SynchroCenter every 3 days. Most recently, CORE by Stay Sharp was updated on November 14, 2026 and SynchroCenter on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*