Comparison

Sprinters Speed Training vs Kairos

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sprinters Speed Training

Enhance your sprinting performance with tailored exercise programs. Optimize starts, strides, and leg turnover for race day. Features audio guidance, instructional videos, and offline workout options.

Highlights
  • Personalized weekly workouts
  • Audio guidance from digital trainer
  • HD instructional videos
  • Offline workout capability
  • DJ-mixed coaching sessions
  • Multiple speed training programs
Features
Read full description

Use this app to get faster! Any sprinter knows that even a fraction of a second can be the difference between losing a race. A sprinter can lose a race for many reasons, but the MOST common reason is they are NOT properly conditioned. This exercise program will give you that edge so that you are ready come race day. This program focuses on getting you in the BEST sprinting shape of your life - helping you optimize your starts off the blocks, full sprinting strides, and leg turnover rate. Your Fitivity app has multiple training programs in it for speed training! Switch between programs that were designed specifically for you! In addition to your weekly workouts, try out Fitivity COACHING! Coaching is a highly engaging exercise experience that combines mixes by DJ's and super motivating trainers to push you through workouts. • Audio guidance from your personal digital trainer • Customized workouts designed for you each week. • For each workout you are provided with HD instructional videos to preview & learn training techniques. • Stream workouts online or do workouts offline. Subscription Details For your convenience, subscription charges will be processed through your iTunes account, ensuring a seamless and secure payment experience. You can manage your subscription at any time, giving you full control over your membership. Should you decide to cancel, simply do so at least 24 hours before the end of your current subscription period to avoid auto-renewal. • Payment is charged to your iTunes account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. You can turn off the auto-renew subscription from your device settings. • Account will be charged for renewal within 24 hours before the end of the current period. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. To manage your subscription or turn off auto-renewal on your iPhone: 1. Open the Settings app 2. Tap your name or Apple ID 3. Tap Subscriptions 4. Tap the subscription you want to manage 5. Use the options to manage your subscription Privacy Policy and Terms of Use: https://www.loyal.app/privacy-policy

About

Kairos

Features
Read full description

Kairos is your intelligent pose movement analysis tool that combines cutting-edge machine learning and computer vision to provide accurate joint tracking and coordinate detection for your videos. Whether you’re an athlete, coach, or therapist, Kairos empowers you to analyze movement efficiently, effortlessly, and securely. Key Features: Pinpoint Joint Coordinates - Intelligent algorithms automatically detect and highlight key joint positions to simplify your movement analysis. Record or Import Videos - Record videos directly within the app or analyze videos from your photo library. Private & Secure - Your data stays yours. All processing happens offline and on-device – no video is stored on servers. Fast and Accurate Perfect For: • Athletes looking to improve performance • Coaches analyzing form and technique • Therapists tracking rehabilitation progress • Fitness enthusiasts optimizing workouts Kairos puts a biomechanics lab in your pocket. Analyze movement anytime, anywhere. Download now and start improving your form today!

Screenshots

Sprinters Speed Training4 screens
Kairos4 screens

Verdict

The call

The clearest difference is in-app purchases: Kairos at none against Sprinters Speed Training's 12. Kairos also leads on ads (none vs shown). Sprinters Speed Training's advantage is iOS requirement (15.0 vs 17). On price, update cadence and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sprinters Speed Training sells 12 in-app purchases, starting at $0.99 per month. Kairos asks for nothing beyond the download.

UpkeepUpdate frequency

Sprinters Speed Training ships an update every 5 weeks, Kairos every 2 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
Sprinters Speed Training versus Kairos: the parameters behind the verdict, then further details
ParameterSprinters Speed TrainingKairos
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17
Further details — not scored
Size110 MB59 MB
Age rating4+4+
DeveloperLoyal Health & Fitness, Inc.Nexiera Technologies, Ltd.

In-app purchases

12 purchases

Sprinters Speed Training

Subscriptions6
  • Monthly Subscription3 Days trial$0.991 Month
  • Fitivity Premium7 Days trial$1.991 Month
  • ad Free One Month$1.991 Month
Show 3 more
  • Yearly Subscription$5.991 Year
  • Yearly Subscription7 Days trial$9.491 Year
  • SPRINTERS SPEED MONTHLY3 Days trial$9.991 Month
One-time6
  • Entire Program - Increase Sprint Speed Strength$2.99
  • Entire Program - Elite Sports Speed & Footwork$2.99
  • Entire Program - Runner Flexibility$2.99
Show 3 more
  • Entire Program - Football Speed & Agility$2.99
  • Purchase levels of all programs$7.99
  • Lifetime Premium Subscription$299.99
None

Kairos

No in-app purchases

Questions

Is Sprinters Speed Training free?
Sprinters Speed Training is free to download, with in-app purchases available.
Is Kairos free?
Kairos is free to download, with no in-app purchases.
Do Sprinters Speed Training or Kairos have ads?
Sprinters Speed Training shows ads; Kairos does not.
Which is updated more often, Sprinters Speed Training or Kairos?
Sprinters Speed Training ships an update every 5 weeks, and Kairos every 2 months. Most recently, Sprinters Speed Training was updated on November 1, 2026 and Kairos on October 28, 2026.

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