VibeLing: a vocabulary app at $1,037 a month (RevenueCat-verified), vibe coded by a solo founder who hand-wrote only the core
A free iOS and Android vocabulary app: save words and phrases you come across and it turns them into short daily practice with translations, examples, audio and spaced repetition, in 15 languages.
$1,037 in the last 30 daysper month, $410 MRR from 98 subscriptions, $2,794 all-time; TrustMRR, RevenueCat-verified, Oct 21, 2026
Figure as posted on X on . Last checked by Shipped & Paid on . What these dates mean
- Verification
- Verified Revenue read from a payment provider via a public third-party profile (e.g. TrustMRR) that matches the claim. See verification.
- App type
- Education & learning
- Currency
- US dollars (USD)
- Built with
- Not stated
- Got customers via
- Reddit, Building in public
- Prior audience
- About 766 followers on X (an Oct 2026 count, not a pre-launch figure) (source)
- Source
- @vital_pavlenko (Pavlenko, founder) on X, Oct 15, 2026
“I wrote this core part myself, by hand, because it's very important. One of the few places where I wrote the code myself. And you say vibe-coded products are crap.”
Editor's note: The founder, who posts as Pavlenko and lists Serbia as his location, writes in Russian; the quote is our translation. He wrote it after finding a seven-month-old bug in the spaced-repetition logic, the one part of VibeLing he says he coded by hand, which implies the rest was built with AI. He doesn't name the coding tool he used for the app itself; elsewhere he uses Claude Code for Reddit automation and for a language tutor that adds words to VibeLing over MCP. He also added ruble payments on Android through YooKassa. His X bio links vibeling.app, and TrustMRR links the listing to the same account.
How they got customers
Reddit is his main described channel: he joins language-learning subreddits as a helpful member and mentions VibeLing sparingly, and he automated the commenting with Claude Code using a persona built from his own backstory. He also builds in public on X, a Telegram channel and Habr. A recent MCP server lets people connect VibeLing to Claude Code or ChatGPT, which he says brought $200 in a day. The app is free, in 15 languages, with a paid subscription.
Steps to try
Hand-write the one part that must be right (here, the spaced-repetition logic) and let AI build the rest; even then, test it.
From the sourceBe a useful member of niche subreddits first and mention your product only in passing.
From the sourceAdd an MCP server so AI assistants can feed your app; he says it made $200 in a day.
From the sourceOffer local payment methods where app stores block them; he added ruble payments on Android.
From the sourceA free app with a subscription can grow slowly for months before it pays: revenue went from about $23 to $855 a month in a year.
Our suggestion
"From the source" steps summarize the linked post. "Our suggestion" steps are general practice from us, not claims by the founder.
Source
We summarize and link. Figures are reproduced as stated and are unaudited unless marked Verified. Founder? Request a correction or removal.
Quick answers
How much does VibeLing make?
VibeLing reports $1,037 in the last 30 days (per month, $410 MRR from 98 subscriptions, $2,794 all-time; TrustMRR, RevenueCat-verified, Oct 21, 2026). Source: @vital_pavlenko (Pavlenko, founder), Oct 15, 2026. Proof level: Verified. Revenue read from a payment provider via a public third-party profile (e.g. TrustMRR) that matches the claim.
What was VibeLing built with?
The source doesn't say which AI tools were used.
How did VibeLing get customers?
Main growth channels: Reddit and Building in public. Reddit is his main described channel: he joins language-learning subreddits as a helpful member and mentions VibeLing sparingly, and he automated the commenting with Claude Code using a persona built from his own backstory. He also builds in public on X, a Telegram channel and Habr. A recent MCP server lets people connect VibeLing to Claude Code or ChatGPT, which he says brought $200 in a day. The app is free, in 15 languages, with a paid subscription.