GrapheneOS
LineageOS
Android
e.foundation /e/
postmarketOS
Ubuntu Touch
DivestOS
Privacy-focused operating system for smartphones based on Android and microG

USZipLookup
ZipCheckup
ZIP Code API
Smarty
Geoco.io
AZIPCODE
PostalCodes.app
Use our free ZIP Code Analysis Tool to find city, state, county, population, and timezone details for any U.S. ZIP code. Fast, accurate, and privacy-safe lookup.

Which is more popular?
Based on our record, CalyxOS seems to be more popular. It has been mentioned 191 times since March 2021.
Website, pricing, platforms and company facts side by side.
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COS
CalyxOS
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|---|---|---|
| Website | calyxos.org | uszipcodes.org |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from India · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of CalyxOS yet.
ZIP Code Analysis Tool is a web-based application that allows users to search any US ZIP code and instantly view detailed location-based data. The tool provides accurate information including city, state, county, latitude, longitude, and population statistics. It is designed for researchers,...
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
CalyxOS Review: The Private & Secure Android ROM For Everyone!
More videos
No usZIPCodes.org videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing CalyxOS and usZIPCodes.org.
usZIPCodes.org's answer:
Their ability to translate simple postal codes into sophisticated geographic insights for a wide range of business and research applications beyond their original mail delivery purpose.
usZIPCodes.org's answer:
The "story" behind the concept of a "ZIP Code analysis tool" is not about a single specific software product, but rather the evolution of the ZIP Code itself from a simple postal sorting mechanism into a powerful, multifaceted geographic data analysis unit used across many industries.
Share your experience with using CalyxOS and usZIPCodes.org. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

It ships with Signal for encrypted messaging; Tor browser to access the web without any tracking; a free and trusted VPN from the Calyx Institute; the open-source Aurora Store, a Play Store alternative, and more....
We have no reviews of usZIPCodes.org yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

I use pixel 3 with https://calyxos.org/ as a home phone to play music, record videos, pictures etc. Calyxos is still providing extended support for 4a, but microG doesn't work as well compared to sandboxed google play services on... - Source: Hacker News / almost 2 years ago
For example https://androidauthority.com/grapheneos-3287030/ > "Even if you stomach the Pixel-only requirement" I have not and will not stomach that at all, nope! https://grapheneos.org/faq#supported-devices Nope! I wasn't paying... - Source: Hacker News / over 2 years ago
I'm sure you did your research. I'm writing for other readers who are interested. There are a few alternatives, more can be found but this is a selection of the most prominent offerings. /e/OS: https://e.foundation/e-os/ GrapheneOS:... - Source: Hacker News / almost 3 years ago
Tracking usZIPCodes.org since Dec 2025.
When comparing CalyxOS and usZIPCodes.org, you can also consider the following products.

GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
Compare GrapheneOS to CalyxOS or usZIPCodes.org:

Find any US ZIP code or Canadian postal code instantly. Search by city, address or code - get accurate location, county & population data free.
Compare USZipLookup to CalyxOS or usZIPCodes.org:

Operating system for smartphones and tablet computers, based on the Android
Compare LineageOS to CalyxOS or usZIPCodes.org:

Check water quality, product recalls, energy rebates, and safety alerts for any U.S. ZIP code. Free reports powered by EPA and government data.
Compare ZipCheckup to CalyxOS or usZIPCodes.org:

Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
Compare Android to CalyxOS or usZIPCodes.org:
REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah
Compare ZIP Code API to CalyxOS or usZIPCodes.org: