「Comment APP, we'll DM you the link」: a 25-year-old Brazilian surf site, one post pushed it to #2 in the Weather chart

Surfguru is a surf forecast website that has been running in Brazil for over 25 years. 2026 years in, in Oct 30, it released its first iOS app. On Nov 2 it posted a "swell alert" on Instagram, and two days later the app hit #2 on the App Store Brazil Top Free Weather chart, reaching #12 on Top Grossing Weather within a week. The product isn't new and the category is crowded. It took off because it moved an audience it already had onto a new entry point. The tactic is worth studying, but it's hard for outsiders to copy.

a "swell alert"

On Nov 2, Surfguru's Instagram account @surfgurupro (about 78k followers) posted a Reel. It opened with a segment it has run for years:

ALERTA SWELL 🔮🌊 Esse alerta swell é especial, pois compartilhamos um lançamento especial: o APP do Surfguru. (Swell alert. This one is special, because we're launching something: the Surfguru app.)

Then came the line: "Digite APP nos comentários que vamos te enviar um link para baixar por mensagem" (Type APP in the comments and we'll send you a download link by DM). The rest was the usual forecast: north swell reaching the northeast coast over the next two days (Fortaleza, Ceará, Rio Grande do Norte), a south-southwest swell hitting the coast from Santa Catarina to Bahia on 8 to 11, and a closing hashtag, #SurfguruAvisou: the big November new-moon swells are coming, download the app to see when and where is best.

Commenters replied "Braboooo🔥" (that's wild) and "Baixei" (downloaded). The same video ran on Facebook with 14k views and 483 comments (Facebook video page). The comment count is high because every "APP" triggered an automatic DM. The trick relies on a comment-keyword auto-reply tool like ManyChat (inferred), so one post drove both engagement and downloads.

What it is

A surf forecast app: wave height, period and direction, wind and tides, a beach map, and saved favorite spots. The free version has ads. Paid Surfguru PRO adds 15-day forecasts, custom alerts, live beach cameras, email reports and over 10 years of wave history. The store page spells out its roots: "Do Swell Fax, em 1995, ao aplicativo de hoje" (from the swell fax in 1995 to today's app).

It's published by Surfguru Portal de Internet LTDA, which has this app as its only product. The app is available in Portuguese and English, and its store subtitle is "Previsão de Ondas e Marés" (Wave and Tide Forecast).

How much it grew

Source: App Store Brazil charts and ratings, 11-01 to 11-06. It charted only in the Brazil store, not the overall chart. Rating: 5.0.

Take these numbers with a grain of salt. The Brazil Weather category has a low bar: Metarcast, near #10 on Top Grossing, has only 75 ratings in total. So "Top Grossing #12" shows people are paying in the app, but not how much. A few thousand downloads is probably enough to reach the top of Top Free (estimate).

On Nov 3, 5 five-star reviews came in within a single day, and they read like longtime users:

"sempre consulto o surfguru pra conferir como está a previsão da minha praia, agora com o app…" (I always check Surfguru for my beach's forecast, and now with the app…)

"moderno, as câmeras integradas direto na previsão, carregando super rápido" (modern, the cameras built right into the forecast, loads super fast)

One review also used the brand hashtag #SurfGuruAvisou. Five reviews landing on the same day looks like friends and loyal followers writing praise together (inferred).

Where users come from

The old website's audience moved to a new entry point. This is the main source. surfguru.com.br is known to almost everyone in Brazil's surf community; per Similarweb's search summary, it ranked #1 among Brazilian water-sports websites in September 2026 (not verified on the original page). The site already had a free ad-supported version and a PRO subscription, it just never had a native app.

One post handled the launch. That's the opening Reel. The timing lines up: posted 11-02, hit #2,11-05 on Top Free 11-04 and gained 14 ratings in a day. It also picked a good moment: the week before big swells, when surfers most want a forecast.

TikTok barely got used. The same warning video 11-03 was posted on TikTok, 516 views; 11-05 the "tap the profile link" one got only 131 views (TikTok @surfgurupro, 4,583 followers).

Nothing else turned up. No paid ads, creator partnerships or press coverage found, and nobody mentioned it on X in 30 days.

Where the money comes from

In-app PRO subscription: R$25 per month, R$250 per year (App Store Brazil page). Subscribing on the website is cheaper: R$20 per month, or R$16 per month billed annually (surfguru.com.br/assine). The in-app premium is roughly 20%, about what Apple takes, and it passes that to users while keeping the cheaper web route open. The free version carries ads, which the store rating lists as "Contém publicidade" (contains ads).

It reached the top 20 of Top Grossing in the first week, so people subscribed to PRO in the app directly. How many were new users versus existing web subscribers switching over can't be seen from the outside.

Who it's competing with

This category is crowded:

Surfguru wins on localization: Portuguese, Brazilian spots, real-denominated pricing, plus local community content like the "swell alert", #SurfguruAvisou and beach-cleanup events. But that's why it became the top site over many years, not why it could chart in one week. This week ran on an existing audience.

How long the chart run can last

It's already sliding: Top Free fell from #2 on 11-04 to #6 on 11-06, and daily new ratings dropped from 14 to 8. The one-time influx of traffic will run out, and whether it sticks depends on whether users formed a habit of opening the app during the 8 to 11 big-swell period. Android data isn't available yet.

If it were you

D. Worth knowing about, nothing more. An established brand moved 25 years of audience into a new entry point. Outsiders can't copy that user base, and surf forecasting already has Surfline, Windy and several Brazilian local apps crowding it.

Who it's for: anyone who already has a website, a community or a account with tens of thousands of followers, and a vertical service that has never shipped a native app. For you, this launch playbook can be used directly.

Who it's not for: indie developers starting from zero who want to build surf, tide or weather forecasting. You have no existing users, and you'd be competing with global leaders, general weather apps and an entrenched local brand all at once. Surfing also depends heavily on season and location, so the market is small to begin with.

How to do it (if you have an audience): the app only needs to be "faster than the website, with the two things people use most on one page" (Surfguru put the cameras right in the forecast view). Wrap the launch post in a recurring segment you already run, rather than a standalone ad. Say in the post "comment a keyword, we'll DM the link," and use an auto-reply tool to send the download link. Price the in-app subscription about 20% above web to pass the Apple cut through, and keep the cheaper web route. In the first two days, have your most loyal users leave reviews to build the starting rating.

How to get users: your own social accounts. Post in the week with the strongest demand (here, before the big swells), chart in a low-barrier category, and use the chart position to drive a second wave of organic downloads.

Is there a deadline: none. This playbook doesn't depend on a window; it depends on whether you already have an audience.

What would mean I got this wrong: (1) By December (Brazilian summer, surf season), Surfguru is still in the top 10 of Top Free Weather in Brazil and still climbing on Top Grossing. That would mean Brazilian surfers will pay for a localized app and the paying market is bigger than it looks, so "a localized surf forecast for another country" (e.g. Portuguese- or Spanish-speaking coastal countries without a decent local app) deserves a serious look, and the grade should go up. (2) If it quickly launches on Android and also charts near the top in Google Play categories, it would show this wave isn't just loyal fans switching entry points.