Look at Lumora's monetization as part of its product design: no ads, no subscription, and a one-time unlock for a puzzle built around low-pressure play.

Monetization can reinforce or fight the mood
Lumora describes itself as a calm puzzle with no timers, no pressure, and no ads. Interruptive advertising would work against that promise by inserting urgency and attention breaks into a deliberately quiet session.
One purchase keeps the business model understandable
The current App Store listing describes a single one-time unlock rather than a subscription. That makes the cost structure predictable for a game that users may open for short, occasional puzzle sessions.
The retention loop comes from puzzles, not interruption
More than 100 hand-crafted levels plus Daily Glow give players reasons to return without requiring ad views or subscription prompts between sessions.
Lumora questions for this workflow
Does Lumora contain ads?
No. The current App Store listing explicitly says there are no ads.
Is Lumora sold as a subscription?
No. The listing describes a single one-time unlock.
What brings players back after finishing a normal level?
Lumora includes more than 100 hand-crafted levels and a Daily Glow puzzle.
Official Lumora product gallery
See the Lumora: Cozy Line Puzzle App Store listing for the official screenshots, current compatibility, pricing, privacy information, and version history.