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eclipsi.info, the tool that calculates what you’ll see from your exact location

Digital productWeb applicationOpen sourceAstronomy 2026
eclipsi.info, the tool that calculates what you’ll see from your exact location
eclipsi.info · 12.08.2026
The starting point

A totality map shows where the shadow will travel, but not what matters on August 12: what will I actually see from this exact spot? The Sun will be very low, so a ridge, mountain or building may shorten or completely hide the key moment.

eclipsi.info was built to answer that question with a free public tool designed for a phone.

What we built

From a general map to real terrain. Pick any point and the app combines its position, elevation and horizon profile to calculate which phases remain visible above the landscape.

A camera that shows where to look. The path of the Sun and every eclipse phase are overlaid on the real view, revealing whether an obstacle will get in the way.

Useful information at the right moment. Minute-by-minute simulation, countdown, voice alerts, location comparison, cloud forecasts and conservative eye-safety guidance all live in one place.

Private and resilient. Calculations happen on the device, with no account, ads or tracking. The PWA can be installed in advance and keeps essential data available with poor coverage.

The key

The challenge was not displaying more data. It was turning astronomy, terrain and eye safety into a simple decision. The interface always answers three questions: where to stand, where to look and for how long.

50,899
unique visitors on eclipse day
8.3 M
requests served in ten days
29
press pieces, in three languages
The impact · 2–13 August 2026

The tool went live on 2 August with 88 visitors. Ten days later, on eclipse day, it served 50,899 unique visitors and 2,975,142 requests. There was no paid campaign: the coverage came because the tool answered a question no other source did.

Daily visitors, two sources Cloudflare · unique visitors GA4 · active users
0 10k 20k 30k 40k 50k 2 3 4 5 6 7 8 9 10 11 12 13 50,899 16,633 August 2026 · day 13 was cut short
See the data as a table
Day Unique (CF) Users (GA4) GA4 coverage Pages (CF) Pages (GA4) Requests
2 88 — — 132 — 1,023
3 220 — — 1,512 — 6,791
4 12,054 2,191 18.2 % 52,195 8,180 348,240
5 6,798 2,012 29.6 % 37,638 10,085 213,153
6 7,521 2,374 31.6 % 42,376 12,229 246,895
7 8,765 3,167 36.1 % 107,934 18,191 536,589
8 11,272 3,637 32.3 % 159,003 20,841 692,421
9 13,536 4,629 34.2 % 171,478 26,934 756,213
10 18,084 5,938 32.8 % 241,686 42,875 1,000,502
11 26,671 8,931 33.5 % 391,199 63,730 1,546,057
12 50,899 16,633 32.7 % 890,866 95,711 2,975,142
13 · partial 3,347 540 16.1 % 22,262 2,007 59,889

On the day itself the curve tells the story better than any total: it climbs all afternoon, peaks at 570,865 requests between 19:00 and 20:00 — about 158 per second — and collapses 95% within two hours. People checked the site until the last moment, then left the screen to look at the sky. The infrastructure held the peak with 666 server errors across 8.3 million requests (0.008%).

Requests per hour · 12 August (local time)
0 150k 300k 450k 600k 570,865 · 19:00 95% drop in two hours 02h 05h 08h 11h 14h 17h 20h 23h 02h 12 August 2026 · local time (CEST)
See the data as a table
HourRequests
02:009,784
03:003,776
04:003,970
05:004,635
06:0011,918
07:0034,540
08:0077,449
09:00106,766
10:00121,906
11:00139,783
12:00144,016
13:00154,697
14:00178,118
15:00205,904
16:00242,815
17:00285,719
18:00420,745
19:00570,865
20:00171,640
21:0029,424
22:0023,994
23:0016,713
00:00 · 1310,273
01:00 · 135,692
02:00 · 136,261

The clipping adds up to 29 publications in Catalan, Spanish and French, from Time Out and Ouest-France to local radio. Only 16 left attributable clicks: audio pieces leave no link, and several written pieces quoted the address as plain text. The numbers below are the floor of each outlet’s impact, never the ceiling.

Clipping · sessions per outlet
Outlet Format Sessions
Large audience
Time Out Barcelona · ES Written 11,397
Time Out Barcelona · CA Written 4,490
El Periódico Written 713
Ouest-France Written 191
Cadena SER Audio — no measurable link
RAC1 Audio — no measurable link
Regional and specialist
Diari de Tarragona Written 900
Regió7 Written 341
Diari de Barcelona Written 2
MetaData Written — no measurable link
La Verdad Written — no measurable link
Lleida.com Written — no measurable link
La Xarxa Audio — no measurable link
Local
Igualada News Written 175
Ràdio Cambrils Audio 25
Esplugues.digital Written 19
El 3 de Vuit Written 16
Ràdio Sant Andreu Audio 13
Vilapress Written — no measurable link
Next Llobregat Written — no measurable link
Viu Molins de Rei Written — no measurable link
Ràdio Desvern Audio — no measurable link
Ràdio Maricel Audio — no measurable link
Outside the initial list
VilaWeb Press page Written 166
dBalears Press page Written 96
La Ciutat Press page Written — no measurable link
Diari de Catalunya Press page Written — no measurable link
Tarragona21 Analytics only Written 25
Rêves d'Espace Analytics only Written 2
29 publications18,571

Sources: Cloudflare GraphQL Analytics (eclipsi.info zone) and Google Analytics 4. Data pulled on 13 August 2026.

How it went
01The questionWhat will I see from this exact spot?
02The mathsAstronomy, elevation and real horizon
03The interfaceMap, camera, simulation and alerts
04OpenFree, installable and open source
05Eclipse day2.9 M requests and 666 errors
Gallery · the project in pictures (click to enlarge)
eclipsi.info, the tool that calculates what you’ll see from your exact location eclipsi.info, the tool that calculates what you’ll see from your exact location eclipsi.info, the tool that calculates what you’ll see from your exact location eclipsi.info, the tool that calculates what you’ll see from your exact location
"I wanted to know whether the eclipse would be visible from home. Maps showed the totality band, but not whether a mountain would block the Sun."Humbert Blanco · creator of eclipsi.info
Credits · who took the shot
Concept, product and developmentHumbert Blanco
StudioDamos en el Blanco

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