vibeling
A vocabulary app that keeps all training modes free but limits the supply of recommended new words for free users, with a paid plan that increases daily recommended words and allows studying multiple languages.
Problem it solves. Helps language learners know which words to study next instead of gating study features.
Who pays. Language learners who need curated word recommendations
Market. education / language learning apps
How it makes money. Pro subscription that raises recommended words per day (free = 3/day, pro = 10/day) and multi-language study
Claimed. $237 MRR, 45 active subscriptions against 3,292 active users in 28 days
Author provides concrete traction metrics (MRR, subscriber count, active users) and commenters critique instrumentation but do not allege fraud or promotion.
“28 day active is a wide net, most of those 3,292 never hit the 3 word cap, so 1.4% measures casual users more than the wall hitters who refused to pay.” ▲ -20
“I don't have that cohort broken out, which is the obvious thing to instrument next.” ▲ -15
“45 subs over nine months means the 60 and 90 day cohorts are single digits, so any curve I draw off them is noise.” ▲ -10