What's a good Android app for a military-style digital watch face that's highly functional but doesn't drain the battery?

Digital SG04 Watch face is a strong candidate for users seeking a tactical, digital interface that balances information density with power efficiency. The design centers on a prominent, segmented digital time display reminiscent of classic military hardware, ensuring high readability at a glance. For functionality, users can typically configure complications for metrics like heart rate, step count, battery levels, and date. This allows for a personalized yet uncluttered dashboard. A key reported benefit is its relatively modest battery consumption compared to more graphically intensive watch faces, making it suitable for extended daily wear or outdoor activities. The interface is generally static with minimal animations, which contributes to this efficiency. However, some user reviews indicate the customization options, while present, are not as extensive as some dedicated utility apps, and the color palette tends to favor high-contrast, monochromatic schemes. It serves well in scenarios where quick access to core fitness stats and time is needed without constant recharging, such as during long work shifts or hiking trips. Its straightforward presentation avoids feeling overly gamified, sticking to a practical, instrument-like aesthetic.