What are some alternatives?
When comparing CopperheadOS and iOS, you can also consider the following products
LineageOS - Operating system for smartphones and tablet computers, based on the Android
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Replicant - Replicant is a distribution of Android that is 100% Free Software.
Life360 Family Locator - Life360 helps manage the chaos of your daily family life and lets you know:
MIUI - Xiaomi MIUI Official Global Site. MIUI is a customized Android ROM developed by Xiaomi for smartphones and tablets. MIUI Forum offers ROM downloads for 251 devices including Mi 6, Mi MIX 2, Redmi Note 4 and others.
Trusted Contacts - Let your loved ones locate you with Trusted Contacts by Google.