By Bo Kalvslund
Report updated Apr 21, 2026
Plank Challenge 4 minutes
For individuals seeking a structured, bodyweight-only fitness routine to improve core strength and stability.
Overview · Full Intel report in progress
Plank Challenge 4 minutes is an established health & fitness app that is completely free. With a 4.7/5 rating from 449 reviews, it shows polarized user reception.
What is Plank Challenge 4 minutes?
Current Momentum
v5.1 · 1mo ago
ActiveLast updated 55d ago. 5 versions tracked.
Competition
Rivals identification in progress
7-Day Rank Pulse 🇺🇸
Health & FitnessNo ranking data
Rating Pulse 🇺🇸
Gathering signals...
What makes this app unique?
How Is The App's Momentum Right Now?
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What Are The Key Features?
A progressive training plan that guides users from short holds to a 4-minute plank over a 5-week period.
Built-in tools to monitor daily workout completion and overall progress toward the 4-minute goal.
Automatically resumes music playback once the daily workout session is completed.
An additional training module that allows users to build capacity from 1 to 100 push-ups at their own pace.
How much does it cost?
Who Built It?
Bo Kalvslund
Developing specialized wellness utilities and localized navigation tools for niche audiences seeking functional, design-led mobile experiences.
Portfolio
13
Apps
Who is Bo Kalvslund?
Bo Kalvslund (operating as AppFar) maintains a high-volume, multi-category portfolio that bridges the gap between specialized fitness utilities and localized Danish navigation tools. Their strategic moat lies in a rapid development cycle that targets specific, underserved niches—such as AR art installations and specialized meditation audio—rather than competing for broad category dominance. The publisher's recent surge in release activity suggests a pivot toward a high-frequency model, testing various utility and educational concepts across the iOS and Android ecosystems.
Who is Bo Kalvslund for?
- Diverse user base ranging from fitness enthusiasts
- Meditation practitioners to students
- Danish travelers seeking localized navigation
Portfolio momentum
Released 60 updates or new titles in the last 6 months with 62.8% of the portfolio currently active, indicating a high-frequency development cycle.
What other apps does Bo Kalvslund make?
Analysis in progress, available soon
What do users think recently?
Analysis in progress, available soon
Analysis in progress, available soon
What is the competitive landscape for Plank Challenge 4 minutes?
How's The Health & Fitness Market?
Market outlook for this category
Available very soon
Strategic analysis coming soon
SWOT, key takeaways & outlook
The outtake for Plank Challenge 4 minutes
Key Takeaways
This app offers a distraction-free, goal-oriented fitness experience centered on progressive bodyweight training.
Where Is It Heading?
Trend analysis
Available very soon