Is there a widely accepted open source alternative to What3Words?


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.
in reply to Carlos Solís

It almost seems like a different use case. It seems like the plus codes are effectively like mailing addresses for places that dont have addresses (lots of countries). They still lack the ability to do clear, analog communication (e.g., over radio or just a person's memory in a search and rescue situation).

I will say, I've noticed the plus codes, but never looked into them. It's really good that they are open source and can be generated offline. Hopefully they have some adoption in other apps/devices.

in reply to evasive_chimpanzee
While Plus Codes are less memorable they are very easy to share verbally. Especially since you only need city + a few characters to be unambiguous. They are very useful any time you need to share a specific location (GPS-style)
Esta entrada fue editada (lunes, 1 de junio de 2026, 18:54)
in reply to evasive_chimpanzee

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.

in reply to evasive_chimpanzee
Esta entrada fue editada (martes, 2 de junio de 2026, 12:43)
in reply to Korhaka
The original use case, as far as I know, is helping search and rescue. Words that are easy to communicate verbally, and easy to remember, so you dont have to worry about bad radio or phone signal garbling communication. Even if your phone dies, or you dont have pen/paper, it's easy enough to remember the three words and communicate to search and rescue after you've made it out to a trailhead or whatever.

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in reply to kambusha
I would hope they minimize the use of homophones. They do use different forms of words, but the way the words are assigned, you aren't going to have 2 really similar sounding locations in the same area. If you know someone went missing on a hike in Scotland, you'll be able to figure out that the three words correspond to a Scottish location and not somewhere in Kenya.

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in reply to notsosure

Oh dang. I haven't actually used the app in a while. It seems like the monetization of core features is a new thing?

It's such a simple and good idea at its core, so it seems really stupid to muck it up. I guess I will just have to go back to using decimal lat/longs. At least mapping applications seem to be able to interpret those better now. For the longest time, even Google maps would just give you no results if you typed in what was obviously lat/long if you didn't have the ° symbol and minutes/seconds.

in reply to notsosure
What3words (stylized as what3words) is a proprietary^[4]^ geocode system designed to identify any location on the surface of Earth with a resolution of approximately 3 metres (9.8 ft). It is owned by What3words Limited, based in London, England. The system encodes geographic coordinates into three permanently fixed dictionary words. For example, the front door of 10 Downing Street in London is identified by ///slurs.this.shark.[^5]^