# K Cast vs sportFX.ai

The clearest difference is price: sportFX.ai at Free against K Cast's $3.99. sportFX.ai also leads on ratings volume (46 vs 7) and iOS requirement (15.5 vs 17.0). K Cast's advantage is in-app purchases (none vs 6) and review sentiment (100% vs 79%). On rating, update cadence, ads and device support there is nothing between them.

sportFX.ai is free to download; K Cast costs $3.99 up front. sportFX.ai sells 6 in-app purchases, starting at $16.99 per month. K Cast asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for K Cast against 4.5 for sportFX.ai. That said, the two scores are not equally well evidenced: sportFX.ai has 46 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 100% of K Cast's written reviews are positive against 79% of sportFX.ai's.

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | K Cast | sportFX.ai |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/k-cast/id6479280679/reviews)** | [4.5 (46 ratings)](https://appshunter.io/ios/app/sportfxai/id6748971449/reviews) |
| Number of ratings | 7 | **46** |
| Positive reviews | **100.0% of reviews** | 78.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 229 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Randal Haehnel](https://appshunter.io/developer/1735424124) | [NurivaTech A.I. Inc.](https://appshunter.io/developer/1828334612) |

## What reviewers say

### K Cast

[App page](https://appshunter.io/ios/app/k-cast/id6479280679)

This app allows baseball pitchers and catchers to communicate pitch calls securely and efficiently using a phone and AirPods. It eliminates the need for traditional signs, speeding up games and preventing stolen signals.

**Highlights:** Secure pitch communication, Uses phone and AirPods, Optional Apple Watch integration, Eliminates traditional signs, Speeds up game play, Prevents stolen signals

**In-app purchases:** none


### sportFX.ai

[App page](https://appshunter.io/ios/app/sportfxai/id6748971449)

This app provides professional biomechanics coaching for athletes using only your phone. It captures and analyzes your movements in 3D to deliver personalized feedback for faster improvement and progress tracking.

**Highlights:** 3D biomechanics analysis, Personalized feedback, Movement capture via phone, Progress tracking, Sports-specific insights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| sportFX Core Monthly | $16.99 | per month |
| sportFX Elite Monthly | $64.99 | per month |
| sportFX Max Monthly | $129.99 | per month |
| sportFX Core Annual | $133.99 | per year |
| sportFX Elite Annual | $649.99 | per year |
| sportFX Max Annual | $999.99 | per year |


## Frequently asked questions

### Is K Cast free?

K Cast costs $3.99, with no in-app purchases.

### Is sportFX.ai free?

sportFX.ai is free to download, with in-app purchases available.

### Which has better reviews, K Cast or sportFX.ai?

K Cast is rated higher. K Cast averages 4.6 out of 5 from 7 ratings, while sportFX.ai averages 4.5 from 46 ratings.

### Do K Cast or sportFX.ai have ads?

Neither K Cast nor sportFX.ai shows ads.

### Which is updated more often, K Cast or sportFX.ai?

K Cast ships an update every 2 weeks, and sportFX.ai every 2 weeks. Most recently, K Cast was updated on October 30, 2026 and sportFX.ai on October 30, 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.*