Challenge 4 Change vs Strahlkraft Studios
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Challenge 4 Change
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PLEASE NOTE: YOU NEED A C4C ACCOUNT TO ACCESS THIS APP. IF YOU'RE A MEMBER GET IT FOR FREE AT YOUR GYM! Begin your journey to a healthier lifestyle and let C4C help you along the way. Introducing C4C, most comprehensive fitness platform with: Check class schedules and opening hours Track your daily fitness activities Track your weight and other body metrics Over 2000+ exercises and activities Clear 3D exercise demonstrations Preset workouts and the option to create your own Over 150 badges to earn Select workouts online and synchronize them with your app to workout at home or in the gym while keeping track of your progress. From strength to weight lifting, this app acts as your own personal trainer guiding and giving you the motivation you need. 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.
Strahlkraft Studios
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Welcome to Strahlkraft Studios – Yoga & Transformation The Strahlkraft Studios are THE Vinyasa yoga studios in the Ruhr area and the surrounding area. With our studios in Dortmund, Bochum, Soest and online, we have been a cool home base for our yogis for over 15 years. Strahlkraft grew up with Vinyasa Yoga, this creative, colorful and exciting yoga style in which everyone can find themselves. Easily book your next yoga class or special via your smartphone, discover our colorful timetables at all locations and use secure and easy online payment. Download now and become part of the Strahlkraft community.
Screenshots
Verdict
Challenge 4 Change and Strahlkraft Studios 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Challenge 4 Change ships an update every 3 months, Strahlkraft Studios every 6 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | Challenge 4 Change | Strahlkraft Studios |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 213 MB | 11 MB |
| Age rating | 12+ | 4+ |
| Developer | Challenge 4 Change GmbH | Strahlkraft Studios |
In-app purchases
Challenge 4 Change
No in-app purchases
Strahlkraft Studios
No in-app purchases
Questions
Is Challenge 4 Change free?
Is Strahlkraft Studios free?
Do Challenge 4 Change or Strahlkraft Studios have ads?
Which is updated more often, Challenge 4 Change or Strahlkraft Studios?
Other comparisons
