PI-Link Speed Radar: The Korean Student Team Putting a Baseball Speed Gun into Your Phone's USB-C Port

2026-02-21 | Product Hunt | Official Website

30-Second Judgment

What is it?: A Doppler radar module that plugs into your phone via USB-C, using the phone's processing power to measure baseball pitch speeds, replacing traditional $300-$1,250 speed guns.

Is it worth watching?: Interesting, but proceed with caution. The idea is great—using the phone's CPU instead of dedicated chips in a speed gun to cut the price to $150. However, the product hasn't officially launched, the Kickstarter plan is over six months late, and a nearly identical product, Scoutee, failed years ago. If you're a baseball fan, keep an eye on it, but don't open your wallet just yet.

Three Questions for Me

Does this matter to me?

Who is the target user?: Amateur baseball players, parents of youth players, grassroots coaches—anyone who wants to track pitch speed but can't justify a $300+ speed gun.

Is that me?: You are the target user if:

• You or your child play baseball/softball and want to track progress.
• You coach a community or school team on a tight budget.
• You're a sports tech enthusiast who loves trying new hardware.

When would I use it?:

• Measuring pitch speed during weekend practice → Use this.
• Recording pitching videos + speed data for training analysis → Use this.
• Professional-grade scouting or high-precision needs → Not enough, get a Stalker Pro II.
• Just for fun to see how fast you throw → The SmartPitch App is enough and it's free.

Is it useful to me?

ROI Judgment: If the product actually launches at $150 with reliable accuracy, it's a steal for amateur players. But right now, it's still "vaporware." I suggest waiting for the official launch and third-party reviews.

Is it exciting?

The "Cool" Factor:

• Extreme Portability: A tiny USB-C module that's 60% lighter and smaller than traditional speed guns.
• Phone as the Brain: No need for extra processing chips; the phone's CPU runs the signal processing algorithms.
• Auto Video Recording: Automatically records video while measuring speed—something traditional guns can't do.

The "Wow" Moment:

"It costs 50% less than traditional speed guns, is 60% smaller and lighter, and can automatically record video and track training history." — TechCrunch CES 2025 Report

Real Feedback:

"While it was hard to judge the system's accuracy on a crowded show floor, the potential for amateur players is huge." — TechCrunch at CES

"We have yet to see CaiqueTech or PI SpeedGun appear on Kickstarter." — iDropNews (hinting at delays)

For Independent Developers

Tech Stack

• Hardware: 24GHz Doppler radar module, connected via USB-C.
• Software: Native iOS App (currently confirmed for iPhone USB-C models only).
• Signal Processing: Radar signal processing algorithms developed by Kyung Hee University's LINC 3.0 project.
• Infrastructure: Local computation (on-device), cloud sync for records.

Core Implementation

Simply put, traditional speed guns need built-in processors to calculate Doppler shifts, which is where the cost lies. PI-Link's approach: the radar module only handles sending and receiving signals, passing that raw data via USB-C to the phone. The phone's A17/A18 chip handles the heavy lifting. This makes the radar module cheap and tiny.

Because it's connected to the phone, it can simultaneously use the camera to record video and use the App for pitch location tracking and history—features traditional guns lack.

Open Source Status

• Is it open?: No. Protected by Korean domestic and PCT international patents.
• Similar Open Projects: There are DIY Doppler radar projects in the Raspberry Pi community, but they are mostly toys.
• Build Difficulty: Medium-High. Radar modules (like HB100) are easy to find, but the signal processing algorithm is the core barrier. Expect 2-3 person-months to build a working prototype.

Business Model

• Monetization: One-time hardware sale, planned Kickstarter campaign.
• Pricing: Target $150 (half the price of Pocket Radar Ball Coach).
• User Base: Not yet officially released.

Giant Risk

Pocket Radar dominates this space at the $300 price point. If PI-Link proves successful at $150, Pocket Radar could easily release their own USB-C module. Stalker has MLB backing and is unlikely to be disrupted at the pro level.

The bigger threat might be pure software. Apps like SmartPitch use the camera to estimate speed. While less accurate than radar, they are free. If AI algorithms keep improving, the hardware moat for radar might shrink.

For Product Managers

Pain Point Analysis

• Problem Solved: Amateur players and grassroots coaches can't afford $300+ speed guns.
• Pain Intensity: Moderate. It's not a "must-have"—you can play without measuring speed. But for serious training, speed data is a vital metric for progress.

User Persona

• Core User: Parents of youth baseball players in the US, Japan, Korea, and Latin America.
• Secondary User: Community baseball coaches, college teams.
• Scenario: Measuring and tracking pitch speed during daily training.

Feature Breakdown

Competitor Comparison

Key Takeaways

1. "Offload Compute" Strategy: Moving heavy tasks from dedicated hardware to the user's existing smartphone significantly cuts costs—a strategy applicable to many fields.
2. Modular Design: USB-C plug-and-play lowers the barrier to entry.
3. Academic Collaboration: Leveraging university labs and patents to lower R&D costs is a great path for student entrepreneurs.

For Tech Bloggers

Founder Story

The team is from Kyung Hee University in South Korea, led by Taewook Lee (a Life Sciences student). The origin story is fun: while playing "screen baseball" (a simulator) in Korea, a teammate with no training, Alex Lee, clocked a 134km/h (83mph) pitch. This sparked a debate about accuracy and led them to wonder: why are speed guns so expensive? Can we do it with a phone?

They received R&D support through the university's LINC 3.0 project, built a prototype, and debuted at CES 2025's Eureka Hall, catching TechCrunch's attention.

Controversy / Discussion Angles

• The Ghost of Scoutee: In 2015, a nearly identical product called Scoutee succeeded on Kickstarter but eventually died. Can PI-Link avoid the same fate?
• Accuracy Doubts: At CES, they only demoed measuring walking speeds. Would you buy a product that hasn't publicly demonstrated actual baseball tracking?
• Timeline Delays: Originally planned for a June 2025 Kickstarter launch; it's now February 2026 and it's still not live.

Hype Data

• PH Ranking: 73 votes, moderate interest.
• Media Coverage: TechCrunch, iDropNews, innovations.fr (France), startupn.kr (Korea).
• Industry Recognition: Selected for "Top 13 Baseball and Softball Tech Startups 2026."
• Social Media: Instagram @caiquetech_ exists but has low activity.

Content Suggestions

• Angle: "From University Lab to CES: How a Korean Student Team is Challenging the $300 Speed Gun Market with $150."
• Trend Opportunity: If the Kickstarter actually goes live, a first-look review will drive traffic. Baseball season (March-October) is the peak interest period.

For Early Adopters

Pricing Analysis

Note: The product is not yet for sale. Prices are based on statements from CaiqueTech reps at CES 2025.

Quick Start Guide

• Setup Time: Estimated 5 minutes (Plug in, open App).
• Learning Curve: Low.
• Steps:
  1. Download the PI-Link App (iOS first).
  2. Plug the module into the iPhone USB-C port.
  3. Open the App and point it at the pitcher.
  4. Start pitching; the App displays speed and records video automatically.

Pitfalls and Complaints

1. Not Yet Released: They said "Kickstarter in June" at CES 2025 (Jan 2025). It's now Feb 2026. Hardware delays are common, but 8+ months is a red flag.

2. History Repeats?: Scoutee tried this in 2015, raised $53K from 394 backers, delayed delivery, and vanished after 2017.

3. iPhone USB-C Only: If you're on Android or an older Lightning iPhone, you're out of luck for now.

4. Unverified Accuracy: No independent third-party data exists. The CES demo was just for walking speeds.

Security and Privacy

• Data Storage: Local on App + Cloud sync (Cloud provider undisclosed).
• Privacy Policy: No detailed policy found on the official site.
• Security Audit: No public information.

Alternatives

For Investors

Market Analysis

• Baseball Equipment: $17.18B (2023) -> $22.03B (2030), CAGR 3.6%.
• Sports Tech: $38.93B (2026) -> $104.51B (2033), CAGR 15.1%.
• Youth Baseball: $56.03B (2025) -> $139.67B (2034), CAGR 10.68%.
• Drivers: 42% of young players prefer smart devices; rising demand for AI training tools.

Competitive Landscape

Timing Analysis

• Why Now?: iPhone's switch to USB-C (starting with iPhone 15) makes external modules viable; mobile chips are now powerful enough for real-time radar processing.
• Tech Maturity: Doppler radar is mature, but the tiny USB-C module + mobile processing combo still needs validation.
• Market Readiness: Consumers are used to phone accessories, but sports users demand accuracy, which requires trust.

Team Background

• Founder: Taewook Lee, Kyung Hee University student.
• Core Team: Student startup; specific headcount unknown.
• Support: Kyung Hee University LINC 3.0 project.
• Track Record: Exhibited at CES 2025 Eureka Hall.

Funding Status

• Raised: No public VC funding.
• Source: University project support.
• Crowdfunding: Kickstarter (Planned for June 2025, currently delayed).
• Valuation: Unknown.

Conclusion

In short: A clever idea that still needs to prove itself. Using the phone's CPU to slash the price by 50% is smart, but an 8-month delay, unverified accuracy, and the ghost of the failed Scoutee are real risk signals.

Resource Links

2026-02-21 | Trend-Tracker v7.3