JAWKU vs What's Your 40
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JAWKU
This app measures athletic performance metrics like speed, agility, and reaction time with a wearable sensor. It allows athletes to track progress, visualize improvements, and access training content to enhance their performance.
- Measure sprint speed
- Measure agility drills
- Measure vertical jump height
- Measure reaction time
- Track performance history
- Visualize personal records
- Access training content
Read full descriptionHide full description
Get Quick. Get Fast. Get JAWKU Speed. This app requires a JAWKU Speed sensor. Numbers don’t lie. And JAWKU Speed provides the key performance data across speed, agility and reaction time, with unrivaled accuracy in wearable technology. We changed the game. We're still changing it. JAWKU Speed was intentionally designed with you, the athlete, as our primary focus. Providing a meaningful experience, supported with accurate data capture hasn't existed like this, until now. The best part - while JAWKU is in a class of it's own, it's as simple to use as a stopwatch. YOUR PERFORMANCE UNLEASHED The JAWKU Speed App brings the entire experience to life. And setting it up is simple! Out of the box, the app will walk you through pairing and in a matter of minutes, you'll be unleashing an experience unlike any other. It's all there to help you understand how you're tracking and making good on all of that training you've been committed to. Let's take a closer look at the main features. TEST + Measure sprint speed + Measure agility (standardized tests or build your own drill) + Measure vertical jump height (NEW) + Measure reaction time off the blocks (in audible mode) + Select your distance and start mode (movement or audible) and you're ready to go TRAIN + Train with purpose. From within the app, you'll have access to the latest in training content from our partner, STACK, where athletes get better TRACK + Track your performance history over time + Visualize your performance against your previous times and personal records + Learn how your reaction time off the blocks is affecting your overall time. Seeing is believing. MY JAWKU + Manage everything here + Check sensor connectivity + Adjust/update your personal profile and settings
What's Your 40
Measure your sprint times for various distances, including the 40-yard dash, and compare them to friends and professional athletes. Upload video proof to claim bragging rights and see how you stack up.
- Measure 40-yard dash times
- Compare times with others
- Upload video proof
- Track various sprint distances
- Challenge friends
Read full descriptionHide full description
Challenge yourself and your buddies to see what's the best time they can achieve in a 40yd dash (and others)! Compare against your favorite NFL players or even your neighbor. Upload your video and claim your bragging rights on the What’s Your 40 app! Powered by Good Ball Network. Video proof of your 40 yard dash. 1. Open App 2. Click Test Your 40yrd Dash 3. Hit the record button. 4. Start the timer 5. End the timer 6. Stop the video 7. Check gallery What's your 40, What's your forty, 40 yard dash, 100 meter, 200 meter, 10, 20,30 yard dash, 10 yard shuttle and more.
Screenshots
Verdict
The clearest difference is rating: JAWKU at 4.0 against What's Your 40's 3.0. JAWKU also leads on review sentiment (68% vs 33%) and ratings volume (257 vs 2). What's Your 40's advantage is update cadence (every 4 days vs every 2 months) and iOS requirement (13.4 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
JAWKU holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: JAWKU has 257 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 68% of JAWKU's written reviews are positive against 33% of What's Your 40's.
JAWKU ships an update every 2 months, What's Your 40 every 4 days. The most recent releases landed on October 22, 2026 and October 7, 2026 respectively.
| Parameter | JAWKU | What's Your 40 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (257 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 67.7% of reviews — better | 33.3% of reviews |
| Number of ratings | 257 — better | 2 |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 13.4 — better |
| Further details — not scored | ||
| Size | 31 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Brian Frohlich | Good Ball L.L.C |
Customer experience
JAWKU
What's Your 40
Bugs and requests
JAWKU
Reported bugs
10 issues- Sensor disconnects at longer ranges (100+ meters)
- Times not recorded despite successful setup
- Audible mode not working on iPhone 13
- Jump clip registration fails
- Device won't charge or pair
Show 5 moreShow fewer
- App loading screens freeze after Bluetooth connection
- Sensor not detected despite proximity
- Timer stops before athlete finishes event
- Inconsistent performance across different iOS versions
- App hasn't been updated in multiple years
Requested features
8 requests- Multi-athlete simultaneous timing capability
- Continuous video recording with manual time selection
- Better documentation and instructional videos
- Improved app updates and maintenance
- Better Bluetooth range extension
Show 3 moreShow fewer
- Camera rotation functionality
- Offline functionality without internet requirement
- Better handling of crowded track environments
What's Your 40
Not enough reviews yet to summarise bugs or requests.
In-app purchases
JAWKU
No in-app purchases
What's Your 40
No in-app purchases
