OpenWhen
A web site for creating 'open when' letters where writing is free and a one-time $3.99 upgrade unlocks photos, voice notes and nicer envelopes.
Problem it solves. Makes it easy to create shareable timed/occasional letters for long-distance relationships and other milestone moments.
Who pays. people sending sentimental/occasional letters (long-distance couples, friends, family)
Market. consumer web / gifting
How it makes money. One-time $3.99 upgrade per letter (adds photos, voice notes, nicer envelopes)
Claimed. Feb $17, Apr $29, May $48, Jun $70, Jul $111, Aug $280, Sep $355, Oct $436
Poster provided month-by-month revenue growth, specific product details (pricing, tech stack) and engaged commenters treated the numbers as plausible rather than calling it self-promo or fake.
“Two numbers decide whether this compounds or stays a one-off. First, payers per hundred letters written, which is your only honest conversion while writing is free. Second, how many buyers write a second letter within 60 days.” ▲ 70
“Did you do something different in August? Revenue increase was crazy that month” ▲ 60