Comparison

Ultimateinstability vs Flow Performance

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

Head to head
About

Ultimateinstability

Access over 2000 animated exercises and pre-built workout programs using specialized equipment. Connect with a community of professionals and sync your workouts with Apple Health.

Highlights
  • 180+ animated exercises
  • 2000+ 3D animated exercises
  • Pre-built workout programs
  • UI-community for professionals
  • Sync with Apple Health App
Features
Read full description

The Ultimateinstability app allows you to complement workouts with Aquabags, Aquaballs and our Hydrovest. Not only does it contain 180+ animated exercises previously hosted on our Online Training Center it also provides you with countless other training exercises; dumbells, functional, core, etc. The Ultimateinstability app contains: - The UI-community, an online gathering place for professionals where ideas can be spread and discussed - 2000+ 3D animated exercises which you can use to create your own workouts and programs - Pre-build workout programs with the Aquabags, Aquaballs and our Hydrovest IMPORTANT NOTE: Before you get access to this application, you have to create your personal account for the Ultimateinstability app (This account is completely independent of the account you used on our website). Once you created your account you will be able to use the application on your desktop and on your phone by downloading the app in the Apple store. Get 3 months of free access to the Ultimateinstability app by creating your account and joining the UI Tribe! You can sync this app with Apple Health App. If you enable this connection, any workout in the Health app with automatically be added to your Activity Calendar.

About

Flow Performance

Achieve your fitness goals with personalized workout and meal plans. Track progress, log workouts and meals, and connect with your coach via chat and video calls. Integrates with fitness bands and health kits for comprehensive insights.

Highlights
  • Personalized workout plans
  • Customized meal plans
  • Progress tracking
  • Wearable integration
  • 1-on-1 coach chat & video calls
  • Daily check-ins
Features
Read full description

Kick-start your fitness journey with Flow Performance. Together with Owen Leonard, you'll have the best combination of nutrition & exercises available on a single app. With Flow Performance, you can begin your fitness journey in no time. Get a fully personalized workout and meal plan tailored to your fitness goals. Progress tracking gets easier when you log your daily workout, record meals, update your check-ins and connect your fitness band & health kit, and get real-time updates via advanced analytical tools. Everything that contributes to your fitness goals gets captured in one place. To top it all, use the inbuilt 1-1 chat feature to have all your queries addressed on the go. You deserve to be the best. That’s why Flow Performance have packed so many features in a single app to help you achieve your fitness goals. Start your journey today! Features that will help you achieve your fitness goals include: * Personalized Workout Plan: Get a fully personalized fitness plan tailored to your goals, whether it is to gain weight, lose weight, gain muscles, or simply wish to work on your general fitness. * Nutrition, Hydration & Habits: Access meal plans assigned by your coach and log your food intake to keep a close track of your calorie intake and macros. You can also track your hydration, steps and calories burnt on the app. * Instant messaging & video calls - Message your coach in real-time and schedule video sessions directly from the app. Stay connected with your coach to improve compliance and get better results. * Check-ins: Gain complete insight into your overall performance with easy check-ins and real-time updates. * Progress: Stay on top of your progress with powerful analytics. * Wearable integration: Get the bigger picture of your progress by connecting your fitness band & health kit thereby enabling real-time updates. Note regarding Apple Health: The app integrates with Apple Health to show your daily activity - distance, steps, active energy, and flights to help you better achieve your goals. App also uses Apple Health to track energy burned and heart rate during a workout session, if an Apple Watch is used. Workout metrics are shared with the coach to better design your workout schedule. DISCLAIMER: Users should seek a doctor’s advice before using this app and making any medical decisions.

Screenshots

Ultimateinstability4 screens
Flow Performance4 screens

Verdict

The call

The clearest difference is review sentiment: Flow Performance at 100% against Ultimateinstability's 0%. Flow Performance also leads on rating (5.0 vs 4.6). On price, ratings volume, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Flow Performance holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 9 and 5 respectively. Written reviews point the same way: 0% of Ultimateinstability's written reviews are positive against 100% of Flow Performance's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.

Scorecard2 real differences · 8 level
Ultimateinstability versus Flow Performance: the parameters behind the verdict, then further details
ParameterUltimateinstabilityFlow Performance
PriceFreeFree
Rating4.6 (9 ratings)5.0 (5 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings9 — better5
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size210 MB131 MB
Age rating12+17+
DeveloperUltimateinstability B.V.Owen Leonard

Customer experience

Ultimateinstability

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Flow Performance

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Ultimateinstability

No in-app purchases

None

Flow Performance

No in-app purchases

Questions

Is Ultimateinstability free?
Ultimateinstability is free to download, with no in-app purchases.
Is Flow Performance free?
Flow Performance is free to download, with no in-app purchases.
Which has better reviews, Ultimateinstability or Flow Performance?
Flow Performance is rated higher. Ultimateinstability averages 4.6 out of 5 from 9 ratings, while Flow Performance averages 5.0 from 5 ratings.
Do Ultimateinstability or Flow Performance have ads?
Neither Ultimateinstability nor Flow Performance shows ads.
Which is updated more often, Ultimateinstability or Flow Performance?
Ultimateinstability ships an update every 2 months, and Flow Performance every 2 months. Most recently, Ultimateinstability was updated on September 10, 2026 and Flow Performance on June 1, 2026.

Other comparisons