# Spark Motion Pro vs Gray Institute

The clearest difference is review sentiment: Spark Motion Pro at 67% against Gray Institute's 0%. Spark Motion Pro also leads on in-app purchases (none vs 10). Gray Institute's advantage is rating (5.0 vs 4.1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Gray Institute sells 10 in-app purchases, starting at $0.49 per month. Spark Motion Pro asks for nothing beyond the download.

Gray Institute holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 14 and 6 respectively. Written reviews complicate that: 67% of Spark Motion Pro's written reviews are positive against 0% of Gray Institute's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Spark Motion Pro | Gray Institute |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (14 ratings)](https://appshunter.io/ios/app/spark-motion-pro/id552652332/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/gray-institute/id1130877074/reviews)** |
| Number of ratings | **14** | 6 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 30 MB | 70 MB |
| Requires iOS | 15 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Spark Motion LLC](https://appshunter.io/developer/449938690) | [Dynamic Health & Fitness, LLC](https://appshunter.io/developer/655559506) |

## What reviewers say

### Spark Motion Pro

[App page](https://appshunter.io/ios/app/spark-motion-pro/id552652332)

This app analyzes movement using video recordings on your iPad. Professionals can capture, edit, and evaluate motion to provide visual feedback and track progress for clients, teams, or patients.

**Highlights:** Record, capture, and evaluate movement, Edit clips and compare videos, Instantaneous visual feedback, 2 GB HIPAA Compliant Spark Cloud storage, Screen Recorder voice-over tool, Precise line drawing and measurement tools, Frame-by-frame analysis (30 or 120 FPS)

**Features:** macOS Compatibility

**In-app purchases:** none


### Gray Institute

[App page](https://appshunter.io/ios/app/gray-institute/id1130877074)

This app helps movement professionals assess clients, design custom workouts, and track progress using functional science. It integrates with a client-facing app to set habits and access educational resources for continuous, measurable client improvement.

**Highlights:** 3DMAPS® Screening Tool, Relative Success Code analysis, Extensive exercise library, Pre-built workout templates, Client progress tracking, Integration with Vitality app

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Plan | $0.49 | per month |
| Movement Professional Locator | $4.99 | per month |
| Individual Subscription Plan | $9.99 | per month |
| Templates | $9.99 | per month |
| Webinars | $9.99 | per month |
| Family Subscription Plan | $14.99 | per month |
| Unlimited Clients | $14.99 | per month |
| Trainer Plus All Access | $19.99 | per month |
| Trainer Plus | $24.99 | per month |
| Trainer Plus | $149.99 | per year |


## Frequently asked questions

### Is Spark Motion Pro free?

Spark Motion Pro is free to download, with no in-app purchases.

### Is Gray Institute free?

Gray Institute is free to download, with in-app purchases available.

### Which has better reviews, Spark Motion Pro or Gray Institute?

Gray Institute is rated higher. Spark Motion Pro averages 4.1 out of 5 from 14 ratings, while Gray Institute averages 5.0 from 6 ratings.

### Do Spark Motion Pro or Gray Institute have ads?

Neither Spark Motion Pro nor Gray Institute shows ads.

### Which is updated more often, Spark Motion Pro or Gray Institute?

Spark Motion Pro ships an update every 2 months, and Gray Institute every 2 months. Most recently, Spark Motion Pro was updated on November 6, 2026 and Gray Institute on November 2, 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.*