CrewNerd – iPhone

Shows the iPhone version of CrewNerd in landscape mode.


A powerful "on the water" app for rowers, paddlers, and coaches. Now with Apple Watch support!

Choose Your Device:

About Us

CrewNerd was launched in 2009 as the first rowing/paddling app for the iPhone and has been updated well over 100 times since then.

The Android version was released in 2013 and has all of the features of the iPhone version.

Recent Posts

For free speed, bounce less!

In rowing and paddling sports, our goal is to move through the water as quickly as possible with as little effort as we can manage. The bio-mechanics of rowing and paddling are incredibly complex, but one of the principles that

Read More »

Eliminating problems caused by water splashes

Most newer smartphones are safe to use around water due to industry-wide improvements in water resistance in recent years. However, even if the phone is in a waterproof case, the problem remains that water drops from rain or splashing can

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Concept2 Logbook now supported!

CrewNerd now allows you to directly upload workout data to your Concept2 Logbook account. This is in addition to the existing support for Strava, TrainingPeaks, and Sportlyzer. We also worked with Concept2 to enable on-the-water workouts to show interval details

Read More »

Row smarter, not harder.
CrewNerd delivers the benefits of a SpeedCoach at a fraction of the cost.

CrewNerd takes the idea of Nielsen-Kellerman’s SpeedCoach and brings it to the iPhone and Android. CrewNerd provides all of the information you get with an NK SpeedCoach and much more.

Using the advanced capabilities of these mobile devices, CrewNerd is able to accurately calculate stroke rate, distance, and speed (or pace).

With a waterproof case (or water-resistant phone) and the CrewNerd application, your device is transformed into a complete training tool that works in any rowing shell, canoe, kayak or dragonboat – with no wiring! You can also use your Apple Watch with or without your iPhone!

Rowers, in particular, will find CrewNerd very intuitive and easy to use, as the user interface borrows familiar ideas from the NK SpeedCoach and the Concept 2 erg monitors.

Try the app for free in trial mode to check out all of CrewNerd's features (work intervals are limited to 3 minutes). If the app is right for you, choose either a monthly subscription (includes 7-day free trial) or get lifetime access for a one-time payment.

Live Tracking allows rowers to share their real-time location and performance data with coaches, friends, and spectators through the free CrewNerd viewer.

The workout editor makes it a snap to create simple time or distance workouts, or interval workouts with any combination of intervals based on time, distance, or strokes.

All workout data is saved on your phone where it can be viewed, graphed, or uploaded to Strava, Apple Health, Concept2, TrainingPeaks, and Sportlyzer.


Using the advanced capabilities of your smartphone, CrewNerd is able to accurately calculate stroke rate, distance, pace, and much more.

Fully Integrated with iOS

  • Uses GPS to calculate distance and speed
  • Uses the accelerometer to detect strokes and calculate stroke rate
  • Optional "black on white" display for use in bright sunlight
  • All screens support both landscape and portrait mode

Real-time Display

  • Configurable layout lets you see just the data that you want
  • Available performance data: time, distance, stroke rate, stroke count, speed/pace, average speed/pace, interval number, direction, time of day, check factor, bounce factor, total distance, meters per stroke, and more
  • Heart rate monitoring is available using most Bluetooth heart rate straps
  • Calculates stroke rates reliably for rowing shells of all sizes, canoes, kayaks, SUP and dragon-boats

Relay Real-time Data to your Coach & Friends

  • CrewNerd’s “Live Tracking” feature relays your location and performance data through our cloud service so it can be viewed by coaches or spectators. Set your boat name, club name, and (optionally) a password on the tracking page. Viewers who know both your club name and password will be able to see your data.
  • The CrewNerd Viewer web application is designed for a wide variety of display sizes, from phones, to tablets, and desktop monitors.
  • Coaches can customize the data they see, and a map view is available to track down any wayward boats. This is also a great safety feature, allowing boathouse staff to keep tabs on everyone easily.

Workout Editor

  • Easy to create new workouts
  • Unlimited storage for workouts
  • Rearrange workouts in your list to make your favorites easy to find
  • Optional “countdown” feature lets you get up to speed before starting the workout

Workout Types

  • Simple distance or time workouts, or intervals based on time, distance, or strokes (with configurable rest between intervals)
  • Custom interval workouts containing any sequence of intervals based on time, distance, or strokes.
  • With the “custom courses” feature, you can draw the start & finish lines of a course in Google Earth. CrewNerd can then start & stop the timer automatically as you cross the start and finish lines.

Workout History & Data Exporting

  • All workout data is stored permanently on your phone
  • Add your own practice notes, list teammates, and record the boat name or type.
  • Use the simple search feature to quickly find workouts in your history.
  • Export data in a variety of popular formats (TCX, GPX, KML, CSV) via email or USB.
  • Upload workout data directly to Strava, Concept2, Apple Health, TrainingPeaks, or Sportlyzer.

Other Features

  • “Coach Mode” allows coaches to use the application to help organize and direct practices from the launch. Let CrewNerd alert you to the end of each work and rest interval. Tap the app screen in time with strokes to check stroke rates.
  • A flexible speech output feature allows vision-impaired athletes to receive performance data at configured intervals.
  • Audible alarms at the end of a work interval and with 15 seconds remaining in a rest interval
  • Automatic start/stop feature lets you start (or pause) a workout when you start (or stop) rowing or paddling

Get rowing or paddling today.

CrewNerd Free Trial


Workout intervals limited to 3 min

CrewNerd offers a free trial mode that gives you full access to all app features, but limits your workout intervals to 3 minutes in lenth. Use this option to see CrewNerd in action!

CrewNerd Monthly


per month (US)

With a renewing monthly subscription, you get the full power of CrewNerd, and the option of upgrading to lifetime access at any time.

The subscription comes with a one-week trial period during which you can cancel your subscription at no cost.

CrewNerd Lifetime


lifetime (US)

Purchase CrewNerd lifetime access for use of all features and app updates at one low price!

Download the app now and start your next row or paddle.