I'm wondering, considering various factors, for the same amount of time spent, which is better for weight loss, walking, or cycling?

My map app estimated that I spent 90 minutes cycling 30 kilometers, which consumed about 680 kcal (I don't know how it calculated, I didn't wear any smart devices, and it didn't ask me about my height and weight). I plan to try using the same app, spending the same 90 minutes to see how many calories walking will burn.

As you can tell, I'm trying my best to not buying new stuff while keeping my brain entertained 😅