Sony announced a clip-on tennis sensor in 2014 at $200. Today, Sony Australia's store files it under archived products, and phones do much of what players bought sensors for. That leaves three kinds of tool: a sensor on the racket, a camera system on the court, and the phone in your bag.
They answer different questions, so the choice depends mostly on the question you have. Prices and availability below are as of November 2026, and US prices unless noted.
What a tennis sensor, a smart court and phone video each measure
| Question | Racket sensor | Smart court or net camera | Phone video |
|---|---|---|---|
| Where did the ball hit the strings? | Yes. This is the clearest sensor advantage. Sony and Zepp both advertised it. | Not listed. | Rarely visible. |
| How fast was the shot? | Sony and Zepp advertised ball speed. | Baseline Vision lists speed and net clearance. | Only with a tracking app. SwingVision lists shot speed. |
| What spin did I hit? | Sony and Zepp advertised spin numbers. | Not listed by Baseline Vision. | An ITF report says SwingVision detects spin type, such as topspin or slice. |
| How did my body and feet move? | No. It sits on the racket. | PlaySight's app lists slow motion, drawing and biomechanical tools. Baseline Vision lists player position. | Yes, if your whole body is in the frame. |
| Why did I miss? | Indirectly. It gives a number but not the cause. | Partly, through replay and match stats. | Often, if you pause at contact and can see the ball, the racket and your feet. |
| Was the ball in or out? | No. | Yes. Baseline Vision and In/Out sell this. | Yes with SwingVision, which gives real-time audio calls. |
| Setup | Attach it to the racket and pair it with an app. | Install the hardware on the court. | A fence clip or a small tripod. |
Be careful with numbers across systems. SwingVision, for example, says it measures average ball speed along the flight, which it says reads about 10% slower than radar. The ITF (now World Tennis) has approved SwingVision and Baseline Vision as Player Analysis Technology, but its reports say that approval does not establish accuracy.
Are tennis sensors discontinued? Sony, Babolat and Zepp today
This table shows the best-known products and how firm the evidence is. We found no official end-of-service notice for the three sensors, so read these rows as what public pages show, not as shutdown announcements. We also did not survey every smaller sensor on sale, so check the current support of any product you find.
| Product | What it was | Status as of November 2026 | How firm is this? |
|---|---|---|---|
| Sony Smart Tennis Sensor | A clip-on sensor measuring shot count, impact spot, swing speed, ball speed and spin. | Sony Australia's store files it as archived and "currently unavailable". A retailer says it has been discontinued. | App status and any end date are unknown. |
| Babolat Play and POP | A connected racket and a wristband sensor. | A retailer lists both as discontinued. Babolat's homepage does not mention them. | One retailer. App status is unknown. |
| Zepp Tennis | An app with video, scoring and Apple Watch stroke tracking. The Zepp Tennis 2 sensor added ball speed, spin and sweet spot numbers. | The App Store listing is still visible, but the last version dates from January 2019. Zepp's homepage does not mention a tennis sensor. | It looks abandoned. A single user review from June 2023 says it no longer works. |
| Coach's Eye (video app) | A video review app. | Retired. Its own notice says it is "no longer a working service". | Official, but the notice gives no date. |
| Hudl Technique (video app) | A video analysis app. | Discontinued. OnForm announced in May 2021 that it had acquired the app and its users, with a shutdown that summer and a move to OnForm. | A press release from OnForm. |
Video apps disappear too, as the last two rows show. The difference is what you keep. When a video app closes, the clips on your phone are still yours, and you can review them yourself or use another app. A sensor depends on its app, so if the app stops working, the hardware has little use.
Phone video: three levels of analysis
- Your camera and your eyes. The only cost is a fence clip. You pause at the contact point and look for yourself. Our filming guide covers the setup.
- Stroke feedback apps. You upload a clip and get comments on technique, and often scores. TennisAI, our AI tennis video analysis app, scores your forehand, backhand and serve, and adds an AI coach chat and progress tracking. It is free to download, with full access through a TennisAI Pro subscription. Other apps in this group include sevensix and TorqAI. What AI can and cannot judge from a clip explains where this kind of analysis is weak.
- Tracking apps. SwingVision uses an iPhone or iPad on a mount, with no sensor, and advertises shot speed, depth, automated stats and line calls. Its site lists a free plan with up to 8 hours of recording a month, and paid plans start at $14.99 a month. If you want numbers from a phone, it is the strongest option we read about.
The two app types do different jobs. Our list of tennis video analysis apps compares them by what they analyze and what they cost.
Smart courts and net cameras: who are they for?
- Baseline Vision: a net-post camera at $1,999 one-time with the app included, plus a Baseline Pro plan at $12 a month, billed annually per camera. It offers live voice line calls and challenges, speed, net clearance, placement and player position. Its app works only with its camera.
- In/Out: about $499 for one net device and two line devices, or $299 for the net device alone, according to a review dated April 2026. Its main job is line calling, plus stats and replays.
- PlaySight: fixed and portable AI camera systems for venues, with match analytics and instant replay. It publishes no prices, so you contact its sales team. Its app also works without its SmartCourt.
These products make sense when one court gets a lot of use, as at a club, an academy or a private court. If you play on public courts with different partners, equipment you must carry and set up each time is less practical, and a phone on the fence covers most of what you need.
Do you need a tennis sensor? A decision table by player and budget
| You are | Budget | Start with | Why |
|---|---|---|---|
| A beginner, or taking lessons | A fence clip or a small tripod. | Phone video, reviewed by you or your coach. | Your priorities are grip, contact and balance. You can see those, and numbers add little yet. |
| A club player who wants stroke feedback between lessons | An app subscription. | A stroke feedback app such as TennisAI. | You get scores and comments on technique with no hardware. |
| A league or competitive player who wants match stats | A free plan, or from $14.99 a month. | SwingVision. | Automated stats, scoring and line calls from one phone. |
| A numbers fan who wants string-contact data | Unclear. Sony's sensor was $200 at launch in 2014, so check current prices. | A sensor, only if you can confirm it is sold and supported. | Sensors are strongest at this one job. |
| A coach working with athletes | From $19.99 a month for OnForm Coach Basic. | OnForm. | It is built for coaches to send video feedback to athletes. |
| A club, an academy or a private court owner | About $299 to $1,999 for hardware, or a sales quote for venue systems. | In/Out, Baseline Vision or PlaySight. | The hardware stays on the court and serves many players. |
A test to run before you buy anything
This takes two sessions and costs no more than a fence clip.
- Write down the one question you want answered, such as "Why does my backhand go in the net?" or "How fast is my first serve?"
- Sort the question. If it starts with "why", phone video can probably help, so carry on. If it starts with "how fast", "how much spin" or "in or out", you need tracking or a sensor, and this test ends here.
- Film five minutes of that stroke side-on in each of two sessions, from the same spot.
- In each clip, pause at contact on 10 strokes and count how many are in front of your body. Write down both numbers.
- If you found a pattern, you do not need hardware yet: practice on that pattern. If you saw nothing useful, ask a coach or try a feedback app before you spend money on equipment.
Frequently asked questions
Do I need a tennis sensor?
Probably not, if your goal is better technique. Phone video shows your swing and footwork, while a racket sensor gives numbers about the racket. A sensor's clearest advantage is showing where the ball hit the strings.
Is the Sony Smart Tennis Sensor still available?
Sony Australia's store lists it as archived and currently unavailable, and a retailer says it has been discontinued. We could not verify the status of its app.
What happened to Zepp Tennis?
As of November 2026, its App Store listing is still visible, but the last version dates from January 2019 and Zepp's homepage does not mention a tennis sensor. We found no official end-of-life notice, so it looks abandoned, not formally closed.
Can a phone measure tennis ball speed?
Yes, with a tracking app. SwingVision advertises shot speed from a single camera and says its reading is an average along the flight, about 10% slower than radar, so do not compare it with broadcast speeds.
Is a smart court worth it for one player?
Usually not. Baseline Vision's camera costs $1,999 as of November 2026, and PlaySight sells to venues through its sales team. These systems make more sense when one court gets a lot of use.
See this in your own game
Upload a practice or match video to TennisAI and get feedback on your forehand, backhand and serve.
Sources
- Sony: Smart Tennis Sensor announcement (2014)
- Sony Australia store: SSE-TN1 (archived)
- Tennis Nuts: Sony Smart Sensor for tennis
- Tennis Nuts: Babolat Play Pure Drive
- Tennis Nuts: Babolat POP tennis sensor
- Babolat: homepage
- App Store: Zepp Tennis
- Zepp: homepage
- Coach's Eye: retirement notice
- PRWeb: OnForm acquires the Hudl Technique application
- App Store: SwingVision: Tennis Pickleball
- SwingVision: FAQ (how it measures speed)
- ITF: approval report for SwingVision (PAT-25-037)
- ITF: approval report for Baseline Vision (PAT-23-029)
- AP via WTOP: the International Tennis Federation is now World Tennis
- Baseline Vision: pricing
- App Store: Baseline Vision
- Gadgets & Wearables: In/Out tennis line calling (April 2026)
- PlaySight: official site
- App Store: PlaySight
- OnForm: official site
- OnForm: pricing
- App Store: sevensix
- App Store: TorqAI: Tennis Swing Doctor
This article is general information about tennis training and does not replace a coach or medical advice. Stop and see a professional if something hurts. TennisAI is made by Pace, the publisher of this blog.
