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Android (Go edition) and Build for Billions
Android Developers Free Intermediate
This is the developer side of the entry level phone: an OS tuned for 4GB RAM and under, with guidance on optimizing your app to run smoothly there. If a real slice of your users are on Go edition or similar low RAM devices, this tells you the hardware limits you are actually designing against. Pair it with the app size guide for a full low end checklist.
- Know the RAM and storage floor your real users live on
- Test on a low RAM device, not just an emulator on a fast machine
- Optimize startup and memory so the app does not get killed in the background