What is the best alternative to Lumos: Sun and Moon Tracker on iPhone?

Sun Seeker - Sunlight Tracker, S tier, #1 in sun tracking.

Is there a free alternative to Lumos: Sun and Moon Tracker?

Yes: Sunrise Sunset Time SolarWatch (A tier, #2) is free to download.

Yes. 2 apps rank above it in sun tracking: Sun Seeker - Sunlight Tracker (#1), Sunrise Sunset Time SolarWatch (#2).

Lumos: Sun and Moon Tracker is A tier, #3 of 6 in sun tracking. Here is everything that competes with it on iPhone, in tier order.

1
Sun Seeker - Sunlight TrackerShigher tier
$11.99 · ★ 4.8 · 12,963 ratings · score 91
Sun Seeker is a solar tracking and compass app showing sun position, sun path, sunrise and sunset times, and twilight.
2
Sunrise Sunset Time SolarWatchA
Free download · ★ 4.7 · 6,051 ratings · score 90
Shows sunrise, sunset and twilight times, with customizable solar alarms, AR mode and map overlays for photo planning.
4
Sun position and pathA
Free download · ★ 4.7 · 1,844 ratings · score 85
Shows the sun's position over the camera view and its 3D path on Google Map, which changes with the season.
5
Helios - Sun & Moon TrackerA
Free + IAP · ★ 4.8 · 1,837 ratings · score 83
Sun and moon tracker showing sunrise, sunset, golden hour and blue hour times, with map and AR camera views.
6
LumyB
$7.99 · ★ 4.8 · 2,410 ratings · score 79
Sun and moon tracker and outdoor activity planner showing sunrise, sunset, golden hour and moon phases.

What is the best alternative to Lumos: Sun and Moon Tracker on iPhone?: Sun Seeker - Sunlight Tracker, S tier, #1 in sun tracking.
Is there a free alternative to Lumos: Sun and Moon Tracker?: Yes: Sunrise Sunset Time SolarWatch (A tier, #2) is free to download.
Does anything rank above Lumos: Sun and Moon Tracker?: Yes. 2 apps rank above it in sun tracking: Sun Seeker - Sunlight Tracker (#1), Sunrise Sunset Time SolarWatch (#2).