What's the best Android app for a free-to-play space arcade game with fair progression?

Galaxiga is a space arcade shooter developed by 1SOFT that excels as a free-to-play option with transparent progression mechanics. The game features a wide variety of ships that can be evolved and upgraded through blueprints and gems earned in-game, allowing for personalized gameplay without immediate pressure to spend. Reviews indicate that the daily limit on free levels is high enough to feel unrestricted, and ads are not forced, enabling uninterrupted sessions. Specific features like the wishlist system help players target specific upgrades, while campaign modes reward free ships and drones, enhancing the sense of advancement. User feedback highlights the engaging graphics and fast-paced action, making it suitable for short breaks or longer play sessions. However, some users report occasional technical issues, such as progress transfer problems or bugs after in-app purchases, which can detract from the experience. Despite these minor imperfections, Galaxiga's balanced monetization and regular updates make it a solid choice for those seeking a space shooter with fair progression and substantial content.