Comparison

THE ÆFFORT vs Flexii

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

Head to head
About

THE ÆFFORT

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Get the best out of your smart trainer and focus on your performance. Ride structured workouts or re-live your outdoor rides from a recorded GPX file. Improve your fitness and measure your success. Pure, simple, and focussed: with THE ÆFFORT you can train with your indoor smart trainer starting at any level. Perform a test to determine your initial fitness level and start working out based on your actual physical condition. Our aim is to provide the best training experience around - not games or fancy visuals. # Workouts We recommend to start with an initial FTP test to identify your physical condition. Based on the test results you can choose out of a variety of different workout types. THE ÆFFORT contains predefined workout bundles but of course you can also import your own workouts or workout bundles (we support FIT and MRC) as well as export your training data as FIT files. If you prefer other options you can also select simulation workouts with a lovely map view (again with predefined bundles or your own routes imported to the app). You could also combine those options or perform completely manual workouts - it’s all up to you. # During a workout When on the ride you can easily control your smart trainer through THE ÆFFORT. The app provides a clean interface with easily accessible controls for skipping, toggles to alter your FeelGood factor, grade/ERG resistance, or target cadence. Of course you can also switch between camera perspectives. And if you want to see what’s going on you can glance over live charts for all the important values or check notifications regarding your workout. Once you’re finished you will find a detailed summary view about your performance which you can share with platforms like TrainingPeaks and Strava or export the data as a FIT file. # Archive In the archive you will find all your completed workouts with statistics, once again with share features and a FIT export, alongside your user profile with all the basic facts like weekly goals, FTP, weight, or heart rate threshold, and user data. There are also all the necessary settings for permissions, sensors, services, workouts, your membership, the app’s appearance and so on. # Progress THE ÆFFORT helps you to stay en route by keeping track of your weekly goals and offering quarterly charts regarding your progress regarding distances, durations, or stress levels. # Smart Trainer integrations THE ÆFFORT currently supports the following devices: smart trainers with BLE required (all Wahoo smart trainers, all Elite smart trainers, trainers supporting FTMS) heart rate sensors with BLE power meters with BLE The app is able to control your smart trainer and to make use of parameters like power, cadence, or heart rate (depending on your model and additional sensors). # Platform integrations Right from the start THE ÆFFORT integrates nicely with these training and health platforms: TrainingPeaks Strava Apple Health Final Surge We’re working on including additional services in the future. # Data handling First and over all THE ÆFFORT values your privacy and the sovereignty over your data. Therefore we store all data on your device only (but make use of iCloud sync options if you wish). Besides that you can import data in the form of FIT files, MRC files, GPX files, or Bundles. Of course you can also export your data as FIT files or share your workout results with platforms like TrainingPeaks, Strava, or Apple Health. THE ÆFFORT subscription is available as a monthly or annual subscription. Sign up and pay using your App Store account. Membership will automatically renew unless cancelled at least 24 hours before the current membership expires. You can turn off auto-renewal after purchase in Settings > iTunes & App Store > Subscriptions. THE ÆFFORT uses HealthKit to export your workouts to the Health app, import completed workouts and to read biometric data. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Flexii

Features
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Du kennst deine Ziele. Und dazu gehören keine Halbwahrheiten, schlechte Trainings und Verletzungen. Du willst performen. Flexii bietet das gezielte Mobilitätstraining, das du brauchst, um die Konkurrenz zu übertreffen, verletzungsfrei zu bleiben und dich schnell zu erholen. Wir sind spezialisiert auf individuelles Beweglichkeitstraining für sechs Sportarten: Tennis, Fußball, Laufen, Radfahren, Skifahren, Handball und insgesamt für deinen aktiven Lifestyle. So ist dein Stretching perfekt auf die Anforderungen deines Sports abgestimmt. Sprenge deine Grenzen, steigere deine Performance und beuge Verletzungen vor. Mit nur drei einfachen Schritten realisiert du das Maximum an Erfolg! Schritt 1 - Alles beginnt mit ein paar Fragen Beantworte, warum du deine Beweglichkeit verbessern möchtest – egal ob Leistungsoptimierung, Verletzungsprävention oder einfach nur die Verbesserung deines Wohlbefindens. So erstellen wir ein Programm, das perfekt auf deine Ziele abgestimmt ist. Schritt 2: Zeig uns deine Flexiibilität Einfach deine Flexbilität messbar machen - das ist unser Mobilitätstest. Mit unserem Score erhältst du einen Startpunkt, um deine Fortschritte zu verfolgen und dein Programm an deine Bedürfnisse anzupassen. So musst du nicht mehr nur auf deine Selbstwahrnehmung vertrauen. Du bekommst einen objektiven Startpunkt für dein individuelles Trainingsprogramm bei Flexii. Schritt 3 - Werde flexiibel Auf der Grundlage deiner Ziele und Testergebnisse erstellen wir einen individuellen Plan, der auf deine Sportart und dein Leistungsniveau zugeschnitten ist. Dein Programm entwickelt sich mit deinen Fortschritten weiter und treibt dich zu Höchstleistungen an. Klare Strategien. Effizientes Training. Mehr Flexiibilität. Das große PLUS an Performance. Das ist Flexii. Abonnement Flexii Premium ist als Abo mit automatischer Verlängerung erhältlich (1 Monat, 3 Monate oder 12 Monate). Die Zahlung erfolgt über dein Apple-Konto. Das Abo verlängert sich automatisch, sofern es nicht mindestens 24 Stunden vor Ende der laufenden Periode gekündigt wird. Du kannst dein Abo jederzeit in den Einstellungen deines Apple-Kontos verwalten und kündigen. Nutzungsbedingungen: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Datenschutzerklärung: https://www.getflexii.app/datenschutz

Screenshots

THE ÆFFORT4 screens
Flexii4 screens

Verdict

The call

The clearest difference is iOS requirement: Flexii at 15.0.0 against THE ÆFFORT's 17.0. On price, update cadence, ads and in-app purchases 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. THE ÆFFORT sells 3 in-app purchases, starting at $6.49 per month and Flexii sells 3 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

THE ÆFFORT ships an update every 2 weeks, Flexii weekly. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

Scorecard1 real difference · 5 level
THE ÆFFORT versus Flexii: the parameters behind the verdict, then further details
ParameterTHE ÆFFORTFlexii
PriceFreeFree
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.0.0 — better
Further details — not scored
Size80 MB59 MB
Age rating4+4+
DeveloperKF Interactive GmbHKirsten Bode

In-app purchases

3 purchases

THE ÆFFORT

Subscriptions3
  • Monthly3 Days trial$6.491 Month
  • Season Pass7 Days trial$39.996 Months
  • Yearly7 Days trial$72.991 Year
3 purchases

Flexii

Subscriptions3
  • Monatlich14 Days trial$11.991 Month
  • 3-monatiges Programm14 Days trial$29.993 Months
  • Jährlich14 Days trial$119.991 Year

Questions

Is THE ÆFFORT free?
THE ÆFFORT is free to download, with in-app purchases available.
Is Flexii free?
Flexii is free to download, with in-app purchases available.
Do THE ÆFFORT or Flexii have ads?
Neither THE ÆFFORT nor Flexii shows ads.
Which is updated more often, THE ÆFFORT or Flexii?
THE ÆFFORT ships an update every 2 weeks, and Flexii weekly. Most recently, THE ÆFFORT was updated on November 7, 2026 and Flexii on November 8, 2026.

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