FlatAtlas
Test flat-Earth models against the real sky.
Test flat-Earth models against the real sky.
This page is designed to help you find out whether FlatAtlas is good and if it is the right choice for you.
FlatAtlas is a free 3D map and sky tool built around one question: where would the Sun, the Moon and the planets be if the published flat-Earth models were right, and where are they really?
It draws Gleason's 1892 map in 3D, places the bodies at the heights published by the Flat Earth Society and Samuel Rowbotham, and shows next to it where astronomy puts the same bodies for any place and time: direction, altitude, rise and set. Stellarium and SunCalc show one picture; FlatAtlas shows both, with sources for every number.
Free tools around it: an Earth curvature calculator, a flight simulator that replays real Flightradar24 flights on both maps, and an Evidence Lab with sourced side-by-side comparisons.
Listed in
3D flat Earth map
Gleason's 1892 map in 3D with the Sun and the Moon at published flat-Earth heights (free)
Real sky side by side
Direction, altitude, rise and set from astronomy for your place and time (free)
Published models
Heights from the Flat Earth Society and Samuel Rowbotham, with sources
Flight simulator
Real Flightradar24 flights replayed on the flat Earth map and on the globe (free; own routes in Pro)
Free tools
Earth curvature calculator and flat Earth flight calculator
Evidence Lab
Sourced side-by-side comparisons, no verdicts
My Sky, planets, time machine
Pro: the real sky from your place, every planet, any moment from 1900 to 2100
Pricing
Free plan; Pro forever with one payment, no subscription
It shows the published flat-Earth models and standard astronomy side by side, for your own place and time. The Sun and the Moon sit above Gleason's 1892 map at the heights the Flat Earth Society and Samuel Rowbotham published, and next to them you see where astronomy puts the same bodies: direction, altitude, rise and set. Every number has a source, and the app never gives a verdict. You compare it with the real sky yourself.
Sky apps like Stellarium, Star Walk or Sky Map show one picture of the sky. FlatAtlas shows two: what the flat-Earth models predict and what astronomy predicts, so you can check both against what you see outside. It runs in the browser with nothing to install, the core is free, and Pro is a single payment instead of a subscription.
People curious about the flat Earth debate who want to check the numbers themselves, teachers and students who use it to explain why the Sun rises and sets, amateur astronomers, and people on both sides of the debate who want a fair, sourced comparison.
FlatAtlas is made by a solo developer from Slovakia. Flat-Earth arguments rarely come with figures anyone can check, so FlatAtlas puts the published figures on a 3D map next to real astronomy and lets people compare. It launched in 2026 and grows with an Evidence Lab of sourced comparisons, free tools and a flight simulator with real flights.
React, TypeScript and Vite for the app, Three.js for the 3D map and sky, astronomy-engine for the positions of the Sun, the Moon and the planets, Supabase for accounts, Paddle for payments and Cloudflare for hosting.
We have collected here some useful links to help you find out if FlatAtlas is good.
Check the traffic stats of FlatAtlas on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of FlatAtlas on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of FlatAtlas's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of FlatAtlas on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about FlatAtlas on Reddit. This can help you find out how popualr the product is and what people think about it.
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Is FlatAtlas good? This is an informative page that will help you find out. Moreover, you can review and discuss FlatAtlas here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
