65 features, one app
Everything Aethr does.
Aethr reads the workouts already in Apple Health and turns them into training analytics, computed entirely on your iPhone. Here is the full list.
Pro marks features included in the one-time Aethr Pro unlock (€11.99). Everything else is free, forever: recording and reliving any single workout never costs anything.
Today and readiness
One screen that tells you how ready you are, built from your workouts and your sleep.
Recent activity and load
Your latest workouts and training load at a glance.
Form gauge (TSB)Pro
Readiness guidance from fitness minus fatigue, with plain-language bands from very fatigued to very fresh.
Fitness and fatiguePro
Chronic and acute training load (CTL, ATL) updated after every sync.
Load ratio (ACWR)Pro
Acute to chronic workload ratio with a sweet-spot band and injury-risk warning.
Sleep score
0 to 100 from duration, bedtime consistency and interruptions, with stage bars.
HRV of the day
Intraday heart-rate variability with a red to green zone line.
Weather
Current conditions and an hourly forecast for planning the session.
Heat-calendar day picker
Pick any day from the activity heat calendar; tap a card for its history.
Workout detail
Every run, ride, hike, walk and ski day, read properly.
Metric slicer
General, pace or speed, power, heart rate, elevation and cadence tabs. Empty tabs hide themselves.
Pace-coloured route map
Slowest to fastest painted along the route, with a full-screen map.
Interactive charts
Scrub any chart; switch the x-axis between time and distance, add smoothing or a running average.
Part of route
Drag handles on the elevation profile, or pick a half or a climb, and the map, charts and stats show only that part.
Splits
Per-kilometre or per-mile splits with the fastest split highlighted and a negative-split badge.
Grade-adjusted pace
Flat-equivalent pace for every foot sport, using the Minetti energy-cost model.
Heart-rate recovery
HR drop 60 seconds and 2 minutes after the workout, rated poor to superior.
Running dynamics
Cadence, stride length, ground contact time and vertical oscillation when your device records them.
Heat-adjusted pace
What your pace was worth at 15 °C, using the weather at the time of the workout.
Time in zones
Heart-rate, power and pace zones counted second by second.
Climbs and elevation
Built for people who go uphill on purpose.
Automatic climb detection
Every climb found and categorised from Cat 4 to HC, with length, gain, grade, VAM and score.
Gradient-painted profiles
Elevation coloured from cold steel to crimson as the grade steepens.
Climb detail
Tap any climb for its own profile, heart rate and zone breakdown.
Ski runs
Ski days get descents instead of climbs, with drop and run count.
Ascent Story
A 9:16 animated video of a climb, rendered on the phone, ready for Stories and Reels.
Cycling power
Power analytics with or without a power meter.
Normalized power, IF and VI
Physiological cost, intensity and variability for every ride with power.
Estimated power
No meter? Aethr can estimate power from speed, gradient and your weight. A real meter always wins.
Power curvePro
Best efforts from 5 seconds to 3 hours, over any period.
Critical power and W′Pro
Sustainable power and anaerobic capacity from your recent bests.
FTP suggestionPro
Threshold suggestions: a suggested FTP from your best 20 minutes, which you accept or ignore.
Trends
The long game, per sport and for your health.
Fitness, fatigue and form chartPro
Months of training load in one chart, rebuilt across all days.
Pace and speed trendsPro
Every workout as a dot with a 5-workout trend line, per sport.
Intensity distributionPro
Weekly time in zones with the 80/20 polarised-training check.
Efficiency and decouplingPro
Aerobic decoupling and efficiency factor to see aerobic fitness grow.
Health trendsPro
Resting heart rate range, daily HRV, sleep score and VO₂max over time.
Activity mixPro
Donut of sports and an activity heat map across the year.
Tap to inspectPro
Pin and scrub any trend chart to read exact values.
Monthly summary
Every month, looked back on properly.
Month in reviewPro
Calendar heat map, totals per sport and the month's trend charts.
Route heat mapPro
Every GPS route of the month on one map, with home and travel areas grouped, as a shareable poster.
Monthly recap filmPro
An animated story where each route draws itself and the totals count up, rendered on the phone.
Records and zones
Records that find themselves, thresholds that respect history.
Personal bests
Personal bests per distance: fastest 1 km, 5 km, 10 km, half and full marathon found anywhere inside a workout, plus ride records.
Race predictorPro
Predicted race times from your freshest efforts.
VDOT training pacesPro
Easy, marathon, threshold, interval and repetition paces from your best efforts.
Critical speed and D′Pro
Your sustainable running speed and the reserve you can spend above it.
Dated thresholds
FTP, threshold heart rate and threshold pace are stored with dates, so older workouts keep the values valid at the time.
Custom heart-rate zones
From max HR, threshold HR, or your own boundaries.
Share and export
Show the work, keep the data.
Share cards
Map, route art, transparent stats sticker and elevation cards with artwork backgrounds.
Climb story videos
Animated climb videos saved straight to Photos.
GPX export
Export any route as a GPX file.
Text summary
A clean text recap of the workout for messages.
Import and other watches
Bring workouts from Garmin, Polar, Suunto, COROS and more.
FIT, GPX and TCX importPro
Open files, ZIP archives, folders or .fit.gz exports. Aethr saves them to Apple Health with route, heart rate, power and cadence.
Duplicate handlingPro
If a watch already synced a summary, Aethr keeps the copy with the route and hides the other.
Anything in Apple Health
Workouts from the Workout app, other apps and other watches, including Garmin via its Apple Health sync, are picked up on the next sync.
Gear
Know when the shoes are done.
One gear item per sport
One item per sport with automatic distance, time and session count.
Unlimited gearPro
Several pairs of shoes or bikes per sport, each with its own mileage.
Replacement reminders
Set a distance limit and Aethr tells you when it is time.
Default gear per sport
New workouts get the right gear automatically; change it from the workout.
Apple Watch app
Record on the wrist, understand on the phone.
Run, cycle, hike, walk and sprint
Live pace, speed, heart rate, distance, ascent, grade and running power.
Structured intervals
Ten classic interval sessions guided on the wrist.
Sprint sessions
Every sprint detected automatically, with a haptic when a rep reaches your chosen distance.
Bluetooth sensors
Heart-rate straps, cadence sensors and power meters.
Saved to Apple Health
Workouts and routes go to Apple Health, then into Aethr on the iPhone.
Made to fit you
Your units, your language, your data.
Seven languages
English, Czech, German, Italian, Polish, Slovak and Spanish.
Units
Automatic by region, or metric or imperial.
Five sports, one load model
Run, ride, hike, walk and ski on one comparable training-load score.
On-device and private
No account and no Aethr servers. Analytics are computed on your iPhone.
Rebuild analytics
Wipe and recompute everything from Apple Health at any time.
Missing something?
Tell us what you would like Aethr to do next. Feature requests go straight to the developers.
Request a feature