Comparison

Ultra Strong vs Flexibull

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

Head to head
About

Ultra Strong

This app offers a smart system for runners to improve performance and prevent injuries. It integrates strength training, technique drills, mobility exercises, and intelligent running programming into personalized plans.

Highlights
  • Integrated strength, technique, and mobility training
  • Intelligent running programming
  • Goal-based training plans
  • Exercise demonstration videos
  • Run logging and progress tracking
  • Community support
Features
Read full description

Ultra Strong: Run Stronger, Faster, Injury-Free You log the miles, push harder, train more… yet progress stalls and niggles creep in. Ultra Strong App helps you break through plateaus with a smarter system: strength, technique, mobility, and intelligent running programming, all in one place. Why Ultra Strong Works: 1. Strength That Transfers: Every movement is designed to power your stride on road and trail. 2. Technique That Sticks: Running technique drills that improve form in weeks, not years. 3. Smart Programming: Every run has a purpose: build endurance or strength, develop speed and power, or boost recovery. 4. Mobility & Recovery: Targeted exercises built into your program to keep you durable and consistent, so injuries don’t derail your training. Results That Speak: “Improved my half-marathon time by 30 minutes and dropped 10kg.” – Patrick “Went from 2:02 to 1:35, and for the first time, I actually enjoy running again.” – Caleb Built for Runners Like You: Whether you’re chasing your first marathon, training for ultras, or want to run smoother and faster, Ultra Strong is designed to unlock performance without burnout or breakdown. Features: Unlimited access to proven Ultra Strong programs Goal-based plans: Half Marathon, Marathon, Ultra In-depth exercise demonstration videos for every exercise Easy logging of runs, sets, reps, and effort Progress tracking and community support Strength, mobility, technique, and running sessions integrated seamlessly

About

Flexibull

Features
Read full description

Unlock your full potential with the ultimate strength training, yoga, and wellness app. Whether you're a seasoned athlete or just starting your fitness journey, our app provides you with a comprehensive library of training programs tailored to a variety of goals. From building muscle to enhancing flexibility, improving mobility, or finding inner peace, we’ve got you covered. With our vast collection of self-guided workout programs, you can take charge of your fitness routine at your own pace. Our library includes beginner-friendly routines, intermediate challenges, and advanced strength training programs designed by professionals to help you progress effectively. You’ll have access to full-length yoga sessions, strength workouts, and holistic wellness practices, all in one place. Whether you prefer high-intensity strength training, calming yoga flows, or a balanced mix of both, there’s something for everyone. The app also offers an extensive library of exercise and yoga demonstration videos, making it easy to learn new movements and refine your technique. Whether you're at home or on the go, the easy-to-follow videos help you improve your form, enhance your performance, and stay committed to your fitness goals. Track your progress and watch your transformation unfold with our built-in workout and nutrition tracking tools. Monitor your progress over time with detailed charts and data that show your improvements in strength, flexibility, and overall wellness. Additionally, track your macros and nutrition to ensure you’re fueling your body properly for optimal results. With smart watch integrations, track your heart rate, sleep, and activity levels, and get a complete view of your physical health in one convenient dashboard.

Screenshots

Ultra Strong4 screens
Flexibull4 screens

Verdict

The call

Ultra Strong and Flexibull are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ultra Strong ships an update every 2 weeks, Flexibull fortnightly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

ScorecardNo meaningful differences
Ultra Strong versus Flexibull: the parameters behind the verdict, then further details
ParameterUltra StrongFlexibull
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size74 MB76 MB
Age rating4+4+
DeveloperPYRY JOHANNES LIUKKONENFlexibull Fitness

In-app purchases

None

Ultra Strong

No in-app purchases

None

Flexibull

No in-app purchases

Questions

Is Ultra Strong free?
Ultra Strong is free to download, with no in-app purchases.
Is Flexibull free?
Flexibull is free to download, with no in-app purchases.
Do Ultra Strong or Flexibull have ads?
Neither Ultra Strong nor Flexibull shows ads.
Which is updated more often, Ultra Strong or Flexibull?
Ultra Strong ships an update every 2 weeks, and Flexibull fortnightly. Most recently, Ultra Strong was updated on October 15, 2026 and Flexibull on October 13, 2026.

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