Every new rider asks the same fair question: my phone already does GPS, maps and Strava, so why would I spend more on a little screen for my handlebars? For plenty of riders the phone genuinely is enough. But bike computers keep selling in the millions, and the reasons are practical, not fashion.
What a phone does badly on a bike
- Battery. GPS tracking with the screen on can flatten a phone in two to three hours. A dedicated unit runs 15 to 40 hours, and you keep your phone charged for emergencies.
- Sunlight. Phone screens fight direct sun. Bike computers use transflective displays that get clearer in bright light, not dimmer.
- Weather and crashes. Head units are built IP67 waterproof and shrug off vibration, rain and the occasional stone. A phone on a bar mount is an expensive thing to drop.
- Sensors. Pairing heart rate straps, cadence sensors, power meters and radar tail lights is what head units are built for. Phones can do some of it, awkwardly.
- Attention. A glanceable, always-on data screen is safer than waking a phone at 30 km/h.
When your phone is honestly fine
If you ride a few kilometres to work, do not care about heart rate or power, and mostly want a record of where you went, a phone in your pocket running Strava is a perfectly good setup. The case for a dedicated computer builds as rides get longer, data gets more interesting, or you start using sensors. If none of that is you, keep the money.
What has changed: good ones are cheap now
The old objection was price, because a colour-screen GPS unit meant Garmin money, 400 dollars and up. That wall has fallen. The Coospo CS600 we tested runs a 2.4 inch colour touchscreen, connects to every sensor type that matters including radar and smart trainers, and its claimed 36 hour battery held up in independent testing, for about 185 dollars delivered in Australia. That is a third of what this spec cost a few years ago.
It is not alone in the budget bracket. The iGPSPORT BSC300T sits at a similar price with a similar colour screen. The Bryton Rider 460, from about 220 dollars, brings stronger navigation and structured training tools. And the Garmin Edge 130 Plus, around 290 dollars, buys the badge and the deepest app ecosystem on a smaller monochrome screen. The point is the floor: genuinely capable units now start under 200 dollars.
What budget units still give up
Navigation is the honest gap. Cheaper computers will show a map and follow a route you load, but auto-syncing routes from Strava or Komoot, rerouting when you miss a turn, and polished turn cues remain big-brand territory. Our CS600 testing found exactly this pattern: superb tracking and battery, workmanlike navigation. If turn-by-turn guidance on unfamiliar roads is your main use, that is the one reason to spend up.
The verdict
Ride short and casual, keep using the phone. Ride longer than a couple of hours, ride in summer sun, care about any sensor data, or want your phone battery intact at the end, and a dedicated computer earns its spot on the bars. And because the budget end has become this good, the entry ticket is now a tank of fuel, not a car payment.