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Lean vs Flux Run

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Lean compared with Flux Run
DetailLean logo LeanFlux Run logo Flux Run
What it doesCalorie counter that measures body fat from a photo and calculates real TDEE AI running coach that plans, talks and adapts to you
StageNot given Not given
FoundedNot given Not given
Based inFR Not given
Pricing modelFreemium Freemium
PricingNot given Free: Run tracking, history, streaks, challenges and leaderboards. Basic: Adds AI running coach. Pro: Full AI coach, advanced run stats and splits, weekly streak freeze, CSV export, no ads. New accounts get 7-day free trial. Prices shown in app.
Key features
  • AI photo recognition of meals and portions
  • Body fat calculation from single photo using AI
  • BMR tracking with metabolic adaptation
  • Step count integration for NEAT calculation
  • Workout tracking with precise calorie expenditure
  • TEF tracking based on macro intake
  • Real-time daily expenditure calculation
  • Adaptive calorie targets throughout the day
  • Food database and barcode scanning
  • Progression Pyramid recommendations
  • Builds personalized weekly training plan for goals from 5K to marathon
  • Adapts training plan after each run based on performance and how you felt
  • GPS tracking with distance, pace, time, route and elevation data
  • Live pace guidance with vibration alerts
  • Apple Watch app with heart rate monitoring
  • Voice updates at every kilometer or mile
  • Syncs to Apple Health or Health Connect automatically
  • Progress tracking with weekly comparisons and streak maintenance
  • Predicted race times for 5K, 10K, half marathon and marathon
  • Weekly leaderboard and community challenges
What makes it different
  • Only app that calculates metabolic adaptation during calorie deficits
  • Body fat measurement from photo rather than formulas
  • Complete TDEE calculation breaking down all four energy expenditure components
  • Proprietary metabolism model built on latest scientific findings
  • Calorie targets adapt in real-time to actual daily expenditure
  • Adaptive AI coach that adjusts plan based on training load and how you felt, not a fixed template
  • Injury awareness that monitors training load and prevents overtraining
  • Goal check feature to verify if goal is realistic before committing
  • 7-day free AI coach trial for new accounts
Community votes00
DR (Domain Rating by Ahrefs)11 +1 (up) since last check14 +11 (up) since last check
Trust Flow (Majestic)221
Citation Flow (Majestic)3119
Referring domains (Majestic)5744

4 details filled in for both companies.

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