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.
Double Shift
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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 studioβs location information. Optimize your time and maximize the convenience of signing up for classes from your device! Download this App today!
Flexible Strength Academy
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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
Verdict
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
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.
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.
| Parameter | Double Shift | Flexible Strength Academy |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks β better | Every 3 months |
| Ads | Yes | Yes |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 123 MB | 89 MB |
| Age rating | 4+ | 17+ |
| Developer | The Turn Holding BV | Sebastiaan Pagano Mirani |
In-app purchases
Double Shift
No in-app purchases
Flexible Strength Academy
- FSA membership7 Days trial$8.991 Month
Questions
Is Double Shift free?
Is Flexible Strength Academy free?
Do Double Shift or Flexible Strength Academy have ads?
Which is updated more often, Double Shift or Flexible Strength Academy?
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