It seems that what3words is proprietary. The app on AppStore expects 40€ annually for quite basic functionality, hard to see how something with potentially useful functionality can get global acceptance at these costs.

  • nitroemdash@lemmy.wtf
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    6 hours ago

    https://plus.codes/ click ミ > Grid

    The full plus-code is actually 8 characters before the plus and 2–3 after. Usually you only need 4 to get within one city. Just like with phone numbers, where the first geographical part is often omitted.