Derny
enpt

Cycling coach for iPhone & iPad

Your rides, your body,
one plan that adapts.

Derny reads every ride, night and heartbeat from Apple Health, Strava, Polar and Garmin, tells you what to ride today, rides with you, and adjusts the plan when life (or a hard day) gets in the way.

Get early accessSee what it does
  • On-device AI
  • Private by design
  • Free during beta
7:41

Good morning

84Readiness
Ready to train
HRV68 ms ▲
Resting HR46 bpm ▼
Sleep7h40 ▲
Today's session
Sweet spot 3 × 12 min
75 min · Z3–Z4 · 88–94% FTP
▶ Start session
✦ Coach briefing

HRV is back above your baseline and you slept 7h40. Good day for the sweet spot work, keep the last block steady.

This week
☀▦◔≡

Works with what you already use

Apple Health/Strava/Garmin Connect/Polar Flow/Zwift/MyWhoosh/Apple Watch/Forerunner 965

Everything a self-coached cyclist needs

Built by a rider for riders. Every screen below is in the app today.

7:41

Good morning

84Readiness
Ready to train
HRV68 ms ▲
Resting HR46 bpm ▼
Sleep7h40 ▲
Today's session
Sweet spot 3 × 12 min
75 min · Z3–Z4 · 88–94% FTP
▶ Start session
✦ Coach briefing

HRV is back above your baseline and you slept 7h40. Good day for the sweet spot work, keep the last block steady.

This week
☀▦◔≡
01Today

Know what to ride today

A readiness score from your sleep, HRV, resting heart rate and recent training load, with a short coach briefing written on your device.

  • Readiness from sleep, HRV and load
  • Briefing by Apple Intelligence, or computed on any iPhone
  • Today's session, one tap to start
7:41

Plan

Gran Fondo · 14 Dec
Build · week 6 of 12
Mon
Rest
●
Tue
VO2max 4 × 4
✓ Done · on target
●
Wed
Endurance 90'
Thu
Sweet spot
↻ Adapted
Fri
Recovery spin
Sat
Long ride 3h
Sun
Endurance 2h
Yesterday was harder than planned: Thursday's intervals moved to Saturday.
☀▦◔≡
02Training plan

A plan that adapts to you

Tell Derny your goal and how much time you have. It builds a periodised plan, ticks sessions off from your rides and scores them on heart rate and power.

  • Base, build, peak and taper phases
  • Easy day ridden hard? The next 48–72 h adjust
  • Move sessions, export workouts to Zwift and MyWhoosh
7:41
Sweet spot 2 of 3Z4
7:42left
Target: 158–168 bpm · 230–250 W
Next: recovery 5 min
Moving time
1:02:17
32.4
km
31.2
km/h
164
bpm
241
W
412
m
88
rpm
💧
Drink now
500 ml per hour on this one
❚❚PAUSE
📍PIN
03Ride

A coach in your pocket while you ride

Start today's session and Derny guides each step with heart-rate and power targets, alerts and reminders to drink and eat.

  • Step-by-step targets with alerts
  • Pin water, danger or a good café on the route
  • Saved to Apple Health with the full GPS route
VO2max 2/4
2:31
left · 172–184 HR
0:41:08
18.6 km♥ 178
04Garmin watch

On your wrist, too

The Derny watch app on the Garmin Forerunner 965 gets today's session from your iPhone, vibrates on every step and sends your pins back.

  • Session steps and cues with vibration
  • Warnings near pinned dangers
  • Pins sync back to the phone
7:41
Morning ride
Merged from 3 sources
64.2
km
2:11
h
148
bpm
212
W
Polar
Heart rate from Polar
✓
Strava
Route and name from Strava
✓
Garmin
Power from Garmin
✓
05All your sources

One ride, every source

Recorded the same ride on your watch, bike computer and Strava? Derny merges them and keeps the best of each: heart rate, route, power and your title.

  • Apple Health, Strava, Polar and Garmin
  • Duplicates merged automatically
  • Indoor rides from Zwift and MyWhoosh
7:41
←Rides map
30 days90 daysHeatRecentBike
💧⚠
38
rides
1 524
km
58
h
14 210
m climb
06Rides map

Every ride on one map

Your own heatmap: the roads you ride most glow brighter. Colour rides by how recent they are or by bike, and tap a line to open the ride.

  • Heat, recent and per-bike colours
  • Your pinned places on the map
  • Map, satellite and hybrid
7:41

Gear

🚲
Planet X
Road · 6 412 km · 241 h
1
🔧 Service due
Hubs · Wet ride since last service
HubsDUE
Wet ride since last service
ChainSOON
410 of 500 km
Suspension fork
12 of 50 h
Brake pads
380 of 1500 km
🔧 Log service
☀▦◔≡
07Gear

Know when to service your bike

Add your bikes and their parts. Each ride adds kilometres and hours to every component, so Derny tells you when the chain, hubs or fork are due.

  • Service by km, hours, months, or after a wet ride
  • Log services, even ones done last month
  • Reminders when a ride makes a part due
7:41

Sleep

7h 40m23:12 – 06:58
DeepCoreREMAwake
HRV trend68 ms
Resting HR46 bpm
☀▦◔≡
08Sleep & heart

Recovery you can see

Sleep stages, HRV and resting heart rate over time, and how they line up with your training.

  • Nights from Apple Watch, Garmin or Polar
  • HRV and resting HR trends
  • Heart rate through the day
7:41
07 · 11 · 2026
Serra do Mar
92.4
km
1 840
elev
3:48
time
DERNY
09Share

Made for your stories

Turn a ride into a clean overlay with the route and stats, ready for Instagram.

  • Transparent overlays and full cards
  • Route on top or below, left, centre or right
  • Copy as a sticker in one tap

And the details

01

iPhone and iPad

A layout for each screen size, synced through your account.

02

Home screen widgets

Readiness and today's session at a glance.

03

On-device AI

Briefings written by Apple Intelligence on your phone, never on a server.

04

Your data stays yours

Stored in your own account. No ads, no selling data.

Get early access

Derny is in private beta on TestFlight. Leave your email and we'll send you an invite as spots open.

I ride with
Where your rides are today

We'll only email you about the Derny beta. Unsubscribe any time.

Questions

How much does it cost?+

Derny is free during the beta.

Which devices does it run on?+

iPhone and iPad with iOS 17 or later. Apple Intelligence briefings need a compatible device; every other device gets computed briefings.

Do I need a power meter?+

No. Heart rate is enough for plans and scoring. If you have a power meter, Derny uses it too.

Which Garmin watches are supported?+

The watch app runs on the Forerunner 965 today. Rides from any Garmin come in through Garmin Connect.

Is there an Android version?+

Not yet: Derny is built for iPhone and iPad first. Pick Android in the form and we'll tell you if and when it comes.

Derny suggests training based on mathematical rules and your data. It does not replace a physical education professional, a coach or a doctor. Get medical clearance before training, and stop and seek help if you feel unwell.