Fondo - Zone 2 Training

Fondo helps you build your aerobic base with Zone 2 training: the intensity at which you can still hold a conversation, the one that improves endurance and recovery. A GOAL EVERY WEEK • Choose how many Zone 2 minutes to do each week: Fondo counts them and tells you how many are left, day by day. • The 80/20 balance shows whether you're keeping about 80% of your time easy. TRAIN WITH A STRAP OR APPLE WATCH • Connect a Bluetooth heart rate strap (Polar, Garmin, Wahoo and other compatible straps) or train directly with Apple Watch. • Pick the zone to hold, the whole zone or just its lower or upper half, and your goal: time, distance or distance in zone. • If you leave your zone, a voice tells you to slow down or push a little, and tells you when you're back. On Apple Watch you get distinct haptics. • Alerts that don't nag: choose immediate, steady or rare. Small swings around the zone limit are ignored. • Your music is lowered only while the voice speaks, then comes back. • Heart rate, zone and time stay visible on the Lock Screen and in the Dynamic Island. RUNNING AND WALKING • Distance, average pace and elevation gain from GPS and barometer, even with the screen locked. No map, no stored route. • Adjustable metronome over your music, to keep a higher cadence and a shorter stride. • Countdown before you start, with pause. INTERVALS • Ready-made workouts: Norwegian 4×4, 30/30 and 5×3′, with adjustable repetitions, durations and zones. • A guide for each workout: what it's for, how to do it and a practical tip. • Spoken cues at every phase change: warm-up, work, recovery, cool-down. THE SCIENCE, WITH SOURCES • A page explains what research says about Zone 2, mitochondria, the 80/20 rule and intervals, with the studies cited. Including what Zone 2 doesn't do. ZONES MADE FOR YOU • Zones calculated from your max and resting heart rate, using the Karvonen method or % of max HR, or set manually. • With the Health app, Fondo estimates your max heart rate from your age and reads your resting heart rate. HEALTH, WIDGETS AND TRENDS • With Health, workouts from Apple Watch and other apps count too; workouts recorded with Fondo are saved to Health, with heart rate and distance. • Widgets for the Home Screen and Lock Screen. • Trends: Zone 2 minutes per week, resting heart rate and VO2 max. ONE PRICE, FOREVER Fondo is free to download with a 14-day full trial, no sign-up and no card required. Then a one-time purchase unlocks everything forever: no subscription, no ads. If you don't unlock, your week and zones remain available. PRIVACY No account, no servers, no tracking. Your data stays on your iPhone, your Apple Watch and in the Health app. Fondo is not a medical device and does not replace medical advice.