By Bo Kalvslund
Report updated Apr 24, 2026
Plank Extreme
For individuals seeking a structured, time-bound fitness program to improve core strength and endurance.
Overview · Full Intel report in progress
Plank Extreme is an established health & fitness app that is completely free. With a 4.8/5 rating from 4 reviews, it shows polarized user reception.
What is Plank Extreme?
Current Momentum
v1.2
Updated with the UMP consent form. Small changes in the user interface.
Competition
Rivals identification in progress
7-Day Rank Pulse 🇺🇸
Health & FitnessNo ranking data
Rating Pulse 🇺🇸
Gathering signals...
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
A progressive training schedule designed to build up to a 7-minute plank duration.
A routine consisting of five days of active exercise followed by two days of rest.
A post-workout feature that allows users to rate their performance after completing exercises.
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 Extreme?
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 Extreme
Key Takeaways
The app offers a specific, goal-oriented training regimen focused exclusively on increasing plank endurance over a 35-day period.
Where Is It Heading?
Trend analysis
Available very soon