# Diamond Kinetics vs True Seam

The clearest difference is in-app purchases: True Seam at none against Diamond Kinetics's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Diamond Kinetics sells 4 in-app purchases, starting at $5.99 per month. True Seam asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Diamond Kinetics | True Seam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (151 ratings)](https://appshunter.io/ios/app/diamond-kinetics/id1604464179/reviews)** | — |
| Number of ratings | **151** | — |
| Positive reviews | 41.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 137 MB | 36 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Diamond Kinetics, Inc.](https://appshunter.io/developer/937803817) | [Drew Elkins](https://appshunter.io/developer/6789769944) |

## What reviewers say

### Diamond Kinetics

[App page](https://appshunter.io/ios/app/diamond-kinetics/id1604464179)

Improve your baseball or softball swing with this app. It offers virtual hitting experiences, swing analysis, and interactive MLB-themed games. Enhance your performance with real-time metrics and personalized feedback.

**Highlights:** Smart Motion Technology for virtual hitting, Diamond Decisions Highlight Arcade, MLB SwingMatch for mechanic comparison, MLB PLAY BALL Challenges & Lessons, Real-time swing metrics with bat sensor, Personalized Swing Score, Interactive hitting games

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DK+ Monthly | $5.99 | per month |
| Smart Bat Monthly | $5.99 | per month |
| DK+ Yearly | $59.99 | per year |
| Smart Bat Yearly | $59.99 | per year |

**What reviewers like**

- 🎮 Engaging games and challenges motivate practice
- ⚾ MLB player lessons and content appeal to kids
- 🏆 Leaderboards and prizes incentivize swings
- 📊 Swing metrics and feedback help improvement
- 👨‍👧‍👦 Gets kids excited to practice outside

**What reviewers complain about**

- 🐛 Frequent connectivity and pairing issues
- 🐛 App crashes and freezes regularly
- 📉 Removed advanced swing analysis features
- ❌ Lost 3D swing path visualization
- ⚠️ Inaccurate distance measurements

**Reported bugs**

- Sensor won't connect to app after firmware update
- Bluetooth pairing fails across multiple devices
- App crashes when selecting bat
- Activation code doesn't work
- Battery dies within 2 minutes

**Requested features**

- Restore 3D swing path visualization
- View individual session history and data
- Multiple metrics displayed simultaneously
- Swing-to-swing comparison and analysis
- Spreadsheet or graph of historical metrics


### True Seam

[App page](https://appshunter.io/ios/app/true-seam/id6789769942)

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

**In-app purchases:** none


## Frequently asked questions

### Is Diamond Kinetics free?

Diamond Kinetics is free to download, with in-app purchases available.

### Is True Seam free?

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

### Do Diamond Kinetics or True Seam have ads?

Neither Diamond Kinetics nor True Seam shows ads.

### Which is updated more often, Diamond Kinetics or True Seam?

Diamond Kinetics ships an update every 2 weeks, and True Seam every 2 weeks. Most recently, Diamond Kinetics was updated on November 3, 2026 and True Seam on November 10, 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.*