Experience persistent theme and font locks with Zyper: for HyperOS MIUI, built by Khun Htetz Naing to stop rapid resets on Xiaomi phones. The app runs a foreground service that keeps third-party .mtz themes and custom fonts active instead of reverting to factory defaults, and offers an integrated setup checklist, optimized background processing, and compatibility with both MIUI and HyperOS. It targets Xiaomi, POCO, and Redmi users who apply third-party themes and want a stable, non-root method to keep customizations.

Zyper preserves third-party themes by holding them in place

Zyper runs a persistent foreground service that prevents the OS from reverting custom .mtz themes and fonts to factory defaults, addressing the 30-to-60-second reset behavior seen on Xiaomi devices. It targets applied themes and fonts specifically and operates without modifying system partitions, which explains why it functions as a non-root workaround for MIUI and HyperOS.

Background service design keeps battery and resource use modest

The developer built Zyper with optimized background processing to minimize battery and RAM consumption while maintaining theme locks. Because it runs as a foreground service, it keeps a visible notification to remain active; that trade-off preserves customizations but produces a continuous background process rather than a transient task. This design suits devices where persistent service permissions are acceptable.

Safety depends on permission choices, not system modification

Zyper operates without root by avoiding direct system writes; safety relies on using supported Android settings rather than modifying firmware. The app's integrated setup checklist walks through required options and explains why each is needed, so users can follow a step-by-step process. Completing these steps keeps the foreground service active while limiting the app's actions to permitted background behavior under MIUI and HyperOS.

• Allow notifications to anchor the foreground service
• Disable battery optimization so the OS does not suspend the app
• Enable Autostart to restore the service after reboot

Simple interface and checklist lower the skill barrier

The app presents a clean interface focused on a short setup flow, which suits users who apply third-party themes regularly but who do not want deep system work. In addition, Zyper's author previously developed zFont, so the tool benefits from developer experience with font and theme workflows known in the community. Casual customizers can complete the checklist without rooting their device.

A practical tool for frequent customizers, with a clear trade-off

Zyper is a practical option for Xiaomi, POCO, and Redmi users who need to keep third-party .mtz themes and custom fonts from reverting, offering a non-root method that uses a persistent foreground service. The trade-off is the required permission changes and a continuous notification to maintain the service. For anyone who applies third-party themes often, it reliably preserves customizations with manageable operational trade-offs.