Norwegian HIIT starting at 30 seconds, scaling to the full 4×4 protocol
Ride tracker that tells you if you'll reach a café before it closes and which way home has the wind behind you
Stage
Not given
Not given
Founded
Not given
Not given
Based in
PL
NL
Pricing model
Free
Paid
Pricing
Not given
€24.99 once, includes Pro features. Free version includes rides and runs, map, route, trace, splits, history and GPX export. Pro adds tailwind compass, wind, places with opening hours, energy estimates, route planner, alerts, charts and CSV export.
Key features
Progressive on-ramp starting at 30-second intervals
Voice-guided coaching throughout entire session
Lock Screen and Dynamic Island display (iOS 17+)
Works with screen locked and music playing
Available in four languages
Personalized heart-rate zones computed from max heart rate
Native Apple Watch Workout app integration
Adaptive level progression based on recovery data
No account, no ads, no tracking
Arrival time prediction based on current pace, route and wind conditions
Tailwind compass showing which way home has wind behind you
Opening hours for cafés, bakeries, water, toilets and repair stops
Offline GPS recording and tracking
Pace tracking in minutes per kilometre or mile
Energy and effort estimates
Per-kilometre splits and elevation tracking
Route planner for out-and-back rides
GPX export and import for head units
CSV export of all activities and stats
What makes it different
Structured progressive on-ramp that no other 4×4 resource offers
Never forced progression: holds levels based on recovery data and never uses shame mechanics
Privacy by design with no account or tracking required
Works completely with screen locked and music playing through voice cues
One-time purchase of €24.99 instead of yearly subscriptions to multiple apps
No accounts, cookies, trackers or server storing your rides
14-day refund policy with no questions asked
Tells you if you'll reach a café before it closes
Works offline for recording and navigation once route is drawn
Crescendo 4×4
Sluip