My Top 4 Bluetooth Cadence and Speed Sensors for Smartphones

If you’re a huge fan of cycling analytics – monitoring your improving speed, fitness level and ride pace – you’re probably aware of the many powerful cycling computers out there.

They’re powerful tools for upping your game, improving your times and reaching your athletic pinnacle.

Once upon a time, a good cycling cadence and speed sensor would cost you hundreds. They would require extensive wiring and water protection, and they wouldn’t necessarily work all that well. Not ideal, right?

But know this: you may have a cycling computer in your pocket already.

Improve Your Cycling Analytics

There are a bunch of great apps which essentially turn your phone into a cycling computer.

Thanks to your smartphone, some clever apps and a bit of inexpensive bluetooth technology, a cadence and speed sensor for iPhone or Android is a reality, and an affordable one at that. No wires, no fuss, no excess gadgetry cluttering up your home or bicycle frame.

This article will review a few of the best wireless iPhone / Android cadence and speed sensors.

We’ll examine them, listing the stats, pros and cons of each.

Wireless Compatibility Issues:

Photo credit: Jun Seita

Photo credit: Jun Seita

Before we go over my favourite Android and iPhone bicycle sensors, it’s important to touch on compatibility.

Basically, all modern smartphones are Bluetooth equipped. This is a short-distance, low-energy radio technology which allows wireless data transmission from one device to another.

It’s what lets your phone connect to your hands-free headset while driving, and it works great in many other applications too, including cycling.

Any Bluetooth-equipped speed and cadence sensor should work with your iPhone or Android device (as long as it is modern enough.) However, most of these products are designed to function with their own app.

Some devices only work with ANT+, which is a wireless protocol similar to Bluetooth but specifically designed for fitness trackers.

Because not all smartphones support ANT+, I’ll focus on Bluetooth devices in this article (though most of the products reviewed here actually support both.)

If you’re already using and loving a particular fitness app, it’s worth checking whether the cycling sensor you like is compatible.


1) Wahoo: A popular wireless cadence sensor for iPhone and Android

This is a brand which has dominated this niche for the last little while. And for very good reason.

The always popular Wahoo Blue SC is a Bluetooth 4.0 compatible cadence and speed sensor that can work with both a smartphone or an ANT+ cycling computer.

It is battery powered and has no wires. All you need to do is clip it on your chainstay. To fasten, you can choose between thick rubber bands or zip ties. (My advice? Use the zip ties, they’re more secure over the long run.)

The Wahoo is waterproof and able to take a beating. It’s also pretty light, coming in at just 36 grams. The battery is not rechargeable, but this device is very low energy, so that tiny little battery only needs to be replaced every 12 months or so.

The Wahoo devours data. You’ll get a readout of your cadence, your speed and the distance you’ve traveled.

It also plays nice with lots of apps, not just Wahoo’s system. Compatible apps include Fitbit, MapMyRide, MyFitnessPal, DigiFit, and many more.

Cons: The Wahoo is slightly more expensive than some of the competition. However, it’s still a heck of a lot cheaper than fully wired bike computer!

For $60, the Wahoo is an affordable bluetooth cadence sensor for iPhone or Android users, and it reviews really well. Check it out!


2) Magene: An ‘armless’ Bluetooth speedometer & cadence sensor

This tiny little sensor speedo by Magene looks a bit different than most other iPhone cadence sensors and speedometers out there, mostly because of the form factor: it doesn’t have the arm.

This device measures both speed and cadence. It’s highly compact and one hell of a slick device.

It uses a button style battery that will last for 500 hours of continuous use, which is incredible. It’s also water resistant and can be used in rain and wet conditions. (You just want to avoid total submersion.)

It mounts to your crank arms, or to your wheel hub.

With an open API, the Magene is highly compatible. Most major fitness apps will talk with it, including Strava, MapMyRide, Wahoo, ZWIFT, etc.

Cons: The interesting thing about this one? It can only measure cadence OR speed. Not both at the same time. For that reason I suggest buying two and measuring both.

You can pick up two of them for around $43, making it inexpensive compared to a lot of the competition. It’s a cheap, sleek, durable, long-lasting smartphone cadence sensor with high marks for compatibility… what’s not to like?


3) CatEye: A Bluetooth cycling sensor & speedo with great brand backing

This impressive CatEye arm-style sensor, like the others in this list, will turn your iPhone or Android into a powerful cycling computer by collecting accurate wireless data.

I like this unit for its reputable brand. CatEye has been in the fitness tracking game for ages. They know their stuff, and you can count on a good warranty, industry-leading durability, and most importantly, accuracy.

I also appreciate its wide compatibility and the robust, data-rich CatEye fitness app. You can pair it to any CatEye tracking device or any smartphone.

In smartphone mode it uses very little of your battery power.

The replaceable coin battery gives you around 1 year of use in standard conditions.

It’s Bluetooth 4.0 compatible, giving you access to all the big apps. It it not ANT+ compatible, but CatEye does make an ANT+ version.

Cons: The CatEye is higher on the price range. It’s a “big brand” item and has a premium build quality, so you’ll pay a bit extra for that. As for functionality, I have zero complaints.

It’s still under $60, which I consider affordable. It’s a top-end bluetooth bicycle cadence speedometer with good reviews and a relatively easy setup… a no-brainer to make this list!


4) CooSpo: A cycling RPM / speed sensor with flexible installation

There are a ton of wireless bicycle cadence sensors out there that have a pretty similar design to the Wahoo. That’s fine, but I like seeing an original design, especially when it recognizes that not all bikes are constructed the same way.

The imaginatively-designed CooSpo does that. And it’s one of the most affordable bluetooth cadence and speed cycling sensors around, coming in at under $30.

Rather than having one solid piece, the CooSpo separates the sensor into two parts, joined by a wire.

The larger portion measures your speed (using a magnet attached to your spokes.) The smaller piece points forward and keeps track of your cadence (or RPM, as CooSpo sometimes refers to it.)

Because there is a bit of flexibility and distance between the two sections, you can customize the mounting somewhat. That’s handy on atypical bikes. It should even work on a stationary bike.

It runs on a button battery and gives about 700 hours of riding per battery; typically that’s more than 1 year of use.

CooSpo doesn’t have their own app, but this slick unit will run happily on most major iPhone and Android applications. It’s also ANT+ compatible in case you need it.

Cons: It’s basic, but the functionality is all there.

Kudos to this company for a creative approach to their product design. With good compatibility, a cheap price, easy installation and a precise sensor, it’s worth taking a look at.


More To Come

This is a growing segment, and I’d expect more iPhone and Android compatible Bluetooth RPM and speed sensors to appear shortly.

I will add to this list as I see appropriate. (If you notice something exciting arrive on the market, let me know and I’ll request a review unit from the manufacturer.)

People are becoming more reliant on their mobile phones for fitness purposes. And you’d better believe that the big ‘traditional’ powers in the cycling analytics world are paying attention; CatEye is already on board, and now Garmin and Sigma too.

Any important sensors that I missed? What do you track with? Feel free to chime in below.