Gradients are hard to guess. We do not have an eye for it. Riding a bike, we notice when it gets too steep, however, it is hard to say how steep that is. That is what the gradient measures.
Comparing Wahoo Elemnt Roam cycling computer with navigation to Garmin Edge. GPS cycling computers are reviewed on a regular basis. After using a Garmin device for years, I have swapped to a Wahoo device. How do they compare?
Planning a recreational ride starts with identifying the options. CyclOSM highlights where you can cycle with blue and green lines and greys out where you cannot.
Canberra has much to offer, but navigation is difficult. The combination of Komoot and GPS bike computers is ideal for finding your way around Canberra. Even if you cannot afford GPS, the free Komoot app is enough.
Despite the in improvement of wayfinding signage, handlebar mounted navigation is still useful. OpenStreetMap is the best cycling map for Canberra. Here is an introduction of digital maps and GPS navigation.