What is the best alternative to Webcams - EarthCam on iPhone?

ISS Live Now, S tier, #1 in live camera viewing.

Is there a free alternative to Webcams - EarthCam?

Yes: ISS Live Now (S tier, #1) is free to download, with in-app purchases.

Yes. 4 apps rank above it in live camera viewing: ISS Live Now (#1), Planet Cam: Live World Map (#2), MAPAS: Live Street View & GPS (#3) and more.

Webcams - EarthCam is B tier, #5 of 9 in live camera viewing. Here is everything that competes with it on iPhone, in tier order.

1
ISS Live NowShigher tier
Free + IAP · ★ 4.6 · 6,691 ratings · score 93
Free Education app with 24/7 live video streams of Earth from the International Space Station, plus orbit tracking and.
2
Planet Cam: Live World MapAhigher tier
Free + IAP · ★ 4.5 · 3,453 ratings · score 90
Free app for watching live camera videos from around the world, browsable through a main page or an interactive map.
3
MAPAS: Live Street View & GPSAhigher tier
Free + IAP · ★ 4.3 · 4,672 ratings · score 86
Free navigation app for browsing street-level imagery, live cameras, 3D and satellite maps, and basic GPS tools.
4
HiLookAhigher tier
Free download · ★ 4.7 · 22,605 ratings · score 83
Free app for remote live viewing, playback and motion alerts from DNR, NVR and IP cameras that support Cloud P2P.
6
LaViewB
Free · ★ 4.7 · 21,909 ratings · score 70
Mobile app for viewing and remotely monitoring LaView Wireless IP cameras and connecting other smart home devices.
7
iSpy Cameras (Ad Supported)C
Free download · ★ 4.6 · 2,139 ratings · score 66
View and control thousands of public live video cameras from around the world on iPhone, iPad or iPod touch.
8
CloudEdgeC
Free + IAP · ★ 4.3 · 21,164 ratings · score 66
Views live and recorded video from home or business sites, with push alerts when motion is detected.
9
TriStar TrafficF
Free · ★ 4.8 · 8,713 ratings · score 44
Shows TDOT live-streaming traffic cameras across Tennessee on an interactive map.

What is the best alternative to Webcams - EarthCam on iPhone?: ISS Live Now, S tier, #1 in live camera viewing.
Is there a free alternative to Webcams - EarthCam?: Yes: ISS Live Now (S tier, #1) is free to download, with in-app purchases.
Does anything rank above Webcams - EarthCam?: Yes. 4 apps rank above it in live camera viewing: ISS Live Now (#1), Planet Cam: Live World Map (#2), MAPAS: Live Street View & GPS (#3) and more.