Comparison

Double Shift vs Flexible Strength Academy

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

Head to head
About

Double Shift

Features
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Download the Double Shift App today to plan and schedule your classes! From this mobile App you can view class schedules, sign-up for classes, as well as view the studio’s location information. Optimize your time and maximize the convenience of signing up for classes from your device! Download this App today!

About

Flexible Strength Academy

Features
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WE TRAIN TO BECOME STRONG & FLEXIBLE | The Flexible Strength Academy app features: - Workout programs for beginners & advanced practitioners - 100+ video tutorials for ALL LEVELS + follow along training sessions - Side split, front split, pancake, spine, shoulders + contortion training - Video tutorials offer in-depth explanations of the exercises - Option to download workouts and access them offline wherever, whenever - Includes progress tracker with the option to upload progress photos - Options to scale drills + exercises to your level - Updates on new workouts in the app INFORMATION ABOUT THE APP AND PURCHASE OPTIONS By signing up, you will get access to subscription(s) that include features such as progress tracking, and offline sync. The download of Flexible Strength Academy is free of charge. Should you use Flexible Strength Academy to access in-app content via available subscription(s), a payment will be charged to your credit card after the trial period ends and when a subscription renews. A subscription renews automatically unless canceled at least 24 hours prior to the end of the subscription period. There is no increase in price when renewing. Subscription(s) can be managed and auto-renewal turned off in Account Settings in the App Store after purchase. Read our full Terms of Service and our Privacy Policy: https://passion.io/terms-of-service https://passion.io/privacy-policy

Screenshots

Double Shift3 screens
Flexible Strength Academy4 screens

Verdict

The call

The clearest difference is in-app purchases: Double Shift at none against Flexible Strength Academy's 1. Double Shift also leads on update cadence (every 5 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Flexible Strength Academy sells 1 in-app purchase, starting at $8.99 per month. Double Shift asks for nothing beyond the download.

UpkeepUpdate frequency

Double Shift ships an update every 5 weeks, Flexible Strength Academy every 3 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

Scorecard2 real differences Β· 4 level
Double Shift versus Flexible Strength Academy: the parameters behind the verdict, then further details
ParameterDouble ShiftFlexible Strength Academy
PriceFreeFree
Update frequencyEvery 5 weeks β€” betterEvery 3 months
AdsYesYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 β€” better15.1
Further details β€” not scored
Size123 MB89 MB
Age rating4+17+
DeveloperThe Turn Holding BVSebastiaan Pagano Mirani

In-app purchases

None

Double Shift

No in-app purchases

1 purchases

Flexible Strength Academy

Subscriptions1
  • FSA membership7 Days trial$8.991 Month

Questions

Is Double Shift free?
Double Shift is free to download, with no in-app purchases.
Is Flexible Strength Academy free?
Flexible Strength Academy is free to download, with in-app purchases available.
Do Double Shift or Flexible Strength Academy have ads?
Both Double Shift and Flexible Strength Academy show ads.
Which is updated more often, Double Shift or Flexible Strength Academy?
Double Shift ships an update every 5 weeks, and Flexible Strength Academy every 3 months. Most recently, Double Shift was updated on October 3, 2026 and Flexible Strength Academy on October 1, 2026.

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