The logo in OPs image is definitely the best IMO. There’s an option in the iOS app to use this icon if you wish. Not sure if it’s an option in the web app.
Yeah "wefwef" was unique and easily searchable. "Voyager", not so much. Using a common word for an app is not really a great move if you want users to easily find your product. Still, I love the app and what the dev has done! Unfortunately though since I got a new phone since wefwef's inception, I no longer have the original pwa or logo on my phone!
My PWA version was broken with the way the back button worked anyway though so I suppose it's for the best. I use the APK version now.