Apps by Bo Kalvslund
Plank Challenge: Core Workout app icon

Health & Fitness

Plank Challenge: Core Workout

Bo Kalvslund

Free download 4.72 · 1 storefront · 468 ratings In-app purchases
Open on Apple

About this app

Hold a 4-minute plank in just 5 weeks – no gym, no equipment, only a few minutes a day. Plank Challenge is a proven, progressive program that takes you from beginner to a 4-minute plank, step by step. HOW IT WORKS - Train 4 days, rest 3 – your muscles get time to recover and grow stronger - Progressive plan designed to prevent injury - Clear daily instructions and progress tracking - Bonus: build from 1 to 100 push-ups at your own pace WHY PLANKS? Planks strengthen your abs, back and arms at the same time. They're one of the most effective bodyweight exercises for core stability and overall strength. FEATURES - 5-week structured program - Push-up challenge from 1 to 100 - Progress tracking - Apple Music integration – your music resumes automatically after each workout - Simple, distraction-free design FOR BEGINNERS AND RETURNERS Whether you're brand new or getting back into shape, the program meets you where you are. PRO - Ad-free - 4 premium themes - Trophy Room - Advanced statistics - Lifetime access – pay once Join 127,000+ people who have built a stronger core with Plank Challenge. Download now and see what you're capable of.

Latest release

What’s New

Version 5.3 Sep 25, 2026

• Trophy Room, statistics and themes are now translated into more languages • Updated names for the Pro color themes • Buttons now match your chosen theme color • Minor improvements and bug fixes

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +4
US rating-count history
468 ratings
468 464 461 Aug 11, 2026 · 461 ratings Aug 18, 2026 · 463 ratings Aug 31, 2026 · 464 ratings Sep 28, 2026 · 468 ratings Aug 11, 2026 Sep 28, 2026

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free 0×
Price history
Current Free
Free Aug 11, 2026 · Free Sep 28, 2026 · Free Aug 11, 2026 Sep 28, 2026
  1. First observed Aug 11, 2026 · 5:01 AM Free

Screenshots

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