iPhone Screenshots


CrewNerd turns your cell phone into an on-the-water training tool in any rowing shell, canoe, kayak or dragon boat - with no wiring! With a waterproof case, you can get real-time data during your workout and even relay it to your coach.

Using the accelerometer in your device, CrewNerd is able to accurately calculate your stroke rate as well as how much bounce (vertical movement) and stern check you are producing. Speed, pace and distance are calculated via GPS.

• Configurable display

In landscape mode there are up to six configurable data fields, and in portrait mode there are up to ten. Choose from the following:
• Stroke rate
• Elapsed time
• Distance
• Speed or pace
• Average speed or pace
• Heart rate
• Stroke count
• Interval count
• Meters per stroke
• Total distance
• Projected time and distance
• Check
• Bounce
• Course (direction)
• Time of day

Set the top line to be double-height to make the most important data stand out. In portrait mode, the top two lines can both be made double-height.

• Custom workouts

Select from one of the provided workouts, or create your own based on distance, time or strokes. An auto-start feature starts the timer when the first stroke is taken, or you can set a “countdown” of 15 or 30 seconds before the timer starts to allow you to build up speed before starting a piece.

• Custom courses

Create custom by plotting your start and finish lines on a map. The application will start the timer automatically when you cross the start line and stop when you reach the finish. This is great for hands free operation in long distance races or for set routes you routinely use.

• Review your data

All workout data is recorded and can be reviewed on the device or exported for use with compatible desktop applications and web sites. Supported export formats: GPX, KML, TCX, and CSV. You can view a map of your workout or view an interval data chart with configurable distance markers showing split times on your phone.

• Heart rate

CrewNerd supports all Bluetooth Smart heart rate monitors.

• Live position tracking

Stream your workout data as it happens to any web browser via CrewNerd.com.

• VoiceOver support

For blind and vision-impaired athletes, CrewNerd provides audible feedback during your workouts. Configure the content and timing of the announcements to meet your needs.

• For coaches

Use custom workouts to keep your practices on target. In coach mode, you can tap anywhere on the screen to check stroke rate. CrewNerd can also be used on the iPad for a larger display.

Waterproof cases are available to protect your iPhone on the water. See our web site for more information.

What’s New

Version 5.09

* Fixed an app crash caused by a bug in Apple's developer tools
* Added support for the new iOS dark theme
* Other minor fixes

Ratings and Reviews

4.4 out of 5
5 Ratings

5 Ratings

iWags ,

Great Paddling App

This app is definitely worth a look. I use it on my surfski every time I go out. It's good insurance to get the waterproof pouch from "Overboard".
From a surfski perspective you won't be able to make use of the stroke rate facility as you generally don't paddle all the time coupled with the fact you can't exert sufficient impetus to register the strokes. That's probably the only feature you won't be able to make use of.
It took some experimenting to get my head around how to get the best out of it. Once you've accomplished that it's "a piece of cake". It is difficult to see the screen in direct sunlight, however, if you create appropriate workouts, the thing will set of sirens and bells to alert you to your next move. You can store all your history and make comparisons.

Plexus52! ,

Some components are good, some not so

In general it is simple to use. The setting and customization is good. Stroke rake, boat check time, timer is good and working. But... the pace is inaccurate, really inaccurate. Most likely due to the sample rate or GPS accuracy in the phone. But if you’re serious about training this really does not replace a stroke coach or the like. So save the money and put it towards a real stroke coach.

refsafysgdfbaisdf ,

Rowing stroke coach is great

Have been using for over 5 years. It has been very helpful is tracking all aspects of my training and racing. 🤓


Performance Phones, LLC
11.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
In-App Purchases
  1. Live Tracking - 10 hours $2.99
  2. Live Tracking - 25 hours $7.99
  3. Live Tracking - 50 hours $13.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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