Search  for anything...

Smart Grip Strength Trainer with Bluetooth APP - Squeeze to Play Games & Scroll Video Hands-Free, Soft Silicone, Portable Hand Exercise for Strength, Stress Relief & Rehab

  • Based on 8 reviews
Condition: New
Checking for the best price...
$3.99 Why this price?
Save $9.00 was $12.99

Buy Now, Pay Later


As low as $1 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Jun 23
Order within 9 hours and 44 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Color: Orange


Size: 30 LB


Features

  • Your Smart Entertainment & Fitness Tracker - Connect via Bluetooth to control short video platforms, e-books, and interactive games hands-free. The app doesnt just count reps; it tracks your workout data, helping you monitor progress and stay motivated. Turn screen time into active, stress-relieving exercise (Note: It Does Not Provide Grip Strength Measurement, Nor Does It Offer Adjustable Resistance)
  • Ergonomic & Hygienic Design for Comfort - Featuring a soft, skin-friendly silicone body with a textured, non-slip surface for a secure grip. The unique detachable design allows you to separate the silicone ring from the core for effortless cleaning and convenient USB-C charging
  • Compact & Ready to Use Anywhere - The donut-shaped design fits snugly in your palm and slips easily into any pocket or bag. Strengthen your grip, forearms, and fingers during commutes, at your desk, while traveling, or watching TVno setup required
  • From Rehabilitation to Strength Training - Whether youre recovering from an injury (start gentle), seeking everyday stress relief, or aiming to build serious grip strength, our trainer adapts. Its an effective tool for all ages and goals, aiding mobility and reducing stiffness from repetitive use
  • A Thoughtful Gift & Lasting Companion - More than a simple grip strengthener, its a smart wellness device that combines exercise with digital life. With durable construction and modern USB-C charging, its the perfect, unique gift for office workers, gamers, fitness lovers, and anyone needing hand recovery

Description

Getting the Most Out of Your Smart Grip TrainerThank you for choosing our Smart Grip Trainer! We've listened to your feedback and want to share some tips to help you get the best experience—whether you're building endurance, recovering from an injury, or just relieving stress.1. About the Resistance Level: It's Designed for Endurance & Comfort Some users mentioned the resistance feels lighter than expected. That's actually by design! Unlike heavy-duty grippers meant for one-rep max strength, our trainer focuses on endurance training through repeated squeezes. This makes it ideal for:Rehabilitation: Gentle, consistent movement helps rebuild hand muscles without strain.Stress Relief: A softer squeeze allows for rhythmic, repetitive motion—perfect for calming your mind.Daily Fitness: Higher reps build lasting grip stamina, which is more practical for everyday tasks.Pro Tip: Don't rush! Aim for multiple sets of 15-20 squeezes. Over time, you'll build noticeable endurance.2. Why Counting May Seem Inaccurate? The "Full Squeeze" Matters A few users noticed the count isn't always accurate. Here's the key: the sensor only registers a full, complete squeeze from open to fully pressed. Partial squeezes won't count. This ensures your workout data reflects real effort.Think of it like a gym rep—only proper form counts! For the most accurate tracking:Start with your fingers relaxed and slightly extended.Squeeze all the way until the two sides nearly touch.Release fully before the next rep.This also makes it perfect for rehab patients who need to retrain full range of motion!3. Improving Bluetooth Connection Stability If you experience occasional connection drops, try these quick fixes:Make sure your trainer is charged (low battery can affect Bluetooth).Keep your phone close (within 3 feet) during use.Close other apps running in the background that might interfere.If connection fails, simply turn Bluetooth off and on again—it usually reconnects instantly!Why Thousands Love This Little Trainer:Rehab Patients: "Helped me regain hand mobility after surgery—gentle but effective."Office Workers: "Keeps my hands busy during calls, actually helps my wrist pain."Students: "Love scrolling video hands-free while studying—best stress helper!"Remember: This isn't about crushing numbers—it's about consistent, mindful exercise that fits your life. Squeeze happy!

Color: Orange


Material: Plastic, Silicone


Brand: JACKBOOM


Item Weight: 2.88 ounces


Style: modern


Brand Name: JACKBOOM


Manufacturer: JACKBOOM


Part Number: SJ200


Unit Count: 1.0 Count


Color: Orange


Style: modern


Item Weight: 2.88 ounces


Item Dimensions L x W: 3.6"L x 2.5"W


Material: Plastic, Silicone


Tension Supported: 30 LB


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Good tool for hand strengthening
This is an SJ200 Smart Grip Strength Trainer for hand strength, from Jackboom. This is a pretty neat little device. It's a silicone ring designed to offer 30 lbs of resistance when you grip and squeeze it. There is an electronic counter that can be taken out for charging. It charges very fast, I timed mine when it was completely empty and it charged to 67% in just barely over a half hour. The device also has Bluetooth and can be paired with your phone, and there is an app which includes some games and such, to make using the hand strengthener more entertaining. I don't want or need the app, so I am using it without. I type for a living and hand strength is important, and I feel like this has been very helpful. I think this is worthwhile to have if you need to strengthen your hands. ... show more
Reviewed in the United States on January 12, 2026 by AliasSmithNJones

  • Excellent Rehabilitation Tool with Essential Digital Tracking Excellent Rehabilitation Tool with Essential Digital Tracking
I suffer from nerve issues in my hand, and sometimes I need tools like this for rehabilitation and exercise to help strengthen my hand back up after an injury or a flare-up. For that purpose, this smart strengthener is fantastic. The resistance on this device is definitely on the lower side, which makes it perfect for building up high repetition counts without causing too much strain. This is key for gradual strength building. The design is also pretty good for what it is; the overall shape feels nice in the hand, and I especially like that the core device can be pulled out easily to charge. That feature is very convenient. The main draw, though, is its ability to keep track of progress and the strength in my hand. I have similar hand exercisers, but none of them have any of the cool digital features this one does. I was able to connect it to my phone using the app they tell you to download, and it accurately keeps track of everything. It's a huge benefit to have that tangible data when you are focused on rehabilitation. It looks like the company makes other devices that work with the same app, which is a nice incentive to stick with their brand for future strengthening needs. Overall, this is a very good value for the money, offering features no other exercisers I've seen have. ... show more
Reviewed in the United States on November 26, 2025 Reviewed in the United States on November 26, 2025 by Customer Review

  • Surprisingly legit workout with fun app games, but not a must-have Surprisingly legit workout with fun app games, but not a must-have
At first glance, I didn’t expect this to be much of a workout. I was wrong. It’s more challenging than it looks, especially if you use it for longer sessions. It reminds me of the old-school grip strengtheners my grandfather used, just modernized. It tracks reps using an internal magnet, so every squeeze counts once you close it far enough. Simple system, but it works consistently and gives you a clear sense of progress. The app is where this gets more interesting. You do end up downloading a fairly generic-looking app, but the games are actually better than expected. One of them has you controlling a character running across the screen where squeezing makes it jump. It’s basically a side-scroller controlled by grip strength. Sounds simple, but it’s harder than it looks and kept me engaged longer than a standard grip trainer would. USB-C charging is a plus, and battery life hasn’t been an issue. Overall, I like it, but I don’t love it. It’s a real workout, the gamification helps with motivation, and it’s more engaging than a basic hand gripper. That said, at this price it’s not for everyone. 4 out of 5 stars. ... show more
Reviewed in the United States on December 31, 2025 Reviewed in the United States on December 31, 2025 by Bill Thomas

  • Nice Grip Strengthener, Fun App to Play Along With Nice Grip Strengthener, Fun App to Play Along With
I love the Jackboom Smart Silicone Grip Strength Trainer, Forearm Strengthener with Data Monitoring, Supports Game Interactions and App Control, Hand Exercisers for Strength,Stress Relief and Rehabilitation. I have been looking for something to help with strengthening my forearms and also grip strength. Also good for stress relief and rehabilitation. Very easy to use and to set up. Comes with a charger and a storage bag for it to travel with it easily as well. I’m not sure if it would be where you could take it on a plane though. Has a game app you can download to your phone to play along and easily make it a fun way to get your reps in. I would get one for my elderly Mom as well. I think she would love to play with the app with this. I would say it’s strong but not too strong for the elderly to use this easily. ... show more
Reviewed in the United States on December 8, 2025 Reviewed in the United States on December 8, 2025 by Heather

  • great tool for hand strength training reps!
This grip trainer is actually way cooler than I'd expected! Made of a soft silicone material. Easy on the hands. Has sort of ribs on the sides that improve grip. They might be a little too sharp, but that's not much of a detraction. They work well and stay in the hand and the grip doesn't hurt your hands, even after a lot of reps. This is NOT difficult to squeeze. With a trainer like this you're going for repetition rather than power. Even a child would be able to squeeze this to the point of engaging the counter, but that's not the point. Squeeze it 200 times and you're going to feel it in your upper arm, doesn't matter who you are! And the counter is perfect - it registers on a complete squeeze, reliably but not easily. Great! Honestly, I don't think I will ever use the bluetooth functionality. I didn't get it for that and I haven't tried it. It says it can be used to scroll through tiktok, which is something I don't care to ever do. But i suppose it's neat that you could train and keep a record, maybe even challenge yourself. For me this is done just fine through the trainer itself. Great tool! ... show more
Reviewed in the United States on November 24, 2025 by Customer Review

  • Easy to use
Easy and relatively comfortable to use. Definitely nicer than the typical "metal loop" style grip trainer. It's lower resistance, but I'm mainly trying to maintain function/flexibility rather than get an actual "workout" from it. There is an app you can use if desired, but it also works fine with the built in counter without connecting. They suggest two different holds for improving grip strength, and there are other variants online. Overall, a portable and quiet tool to use that feels decently well made with solid battery life. ... show more
Reviewed in the United States on November 30, 2025 by TKWM

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...