GTM Sauce

Sub Club by RevenueCat · 2026-04-29

Why Opal Stopped Chasing Revenue – Kenneth Schlenker, Opal

Opal co-founder/CEO Kenneth Schlenker on moving the screen-time app from a hard paywall to true freemium after reaching $10M ARR with ~11 people. Pay penetration fell from ~20% to 9% of MAU, but organic growth, DAUs (1M+) and revenue rose; students became two-thirds of DAUs and pulled Opal into schools (Opal for Schools, per-student fee). Also: tuning free limits (3 free blocks), a licensed organic video as a long-running ad, a hired user-creator account (0 to 700K followers), gemstone/streak rewards, and a 'Scrolling Kills' billboard with no measurable download impact.

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9 tactics

Opal · screen time and focus app

Paying share of users fell 20% to 9%, but organic growth, 1M+ DAUs and revenue rose

After reaching $10M ARR on a hard paywall, Opal made the core product free ('truly freemium') so free users become the marketing. Success measured by install LTV plus overall free+paid retention. Freemium unlocked a new segment (high school and college students, now ~2/3 of DAUs) who spread it among classmates and family, and later pulled Opal into schools. Guiding test for where to draw the free line: would a non-payer recommend the app? If not, give away more; avoid a free tier that feels like a capped trial.

Workedpaywallword-of-mouth
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

3 free blocks gave free users a great experience while power users still pay

Core feature is 'blocks' (scheduled app blocking, e.g. social media 9-10am Mon-Fri, or open limits like Instagram 10 opens/day). Tested free allowances from 1 block (too restrictive) up to several; measured two things together: LTV of installs (conversion and payment) and overall retention of free plus paid users, looking for the point where both rise. Landed on 3 free blocks; power users who want more pay.

Workedpaywallexperimentation
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

Grew from one school to many US high schools; front-page LA Times coverage

Harvard-Westlake emailed after its students, asked how to handle a state phone ban, recommended Opal. Built Opal for Schools: students install Opal; on campus banned apps are blocked while approved apps (texting parents, ChatGPT, calculators, educational apps) stay open; after school students keep using it for sleep schedules and focus timers ('bell to bed'). Charges schools a per-student fee priced below alternatives, since the brand and family reach is worth more than the fee. A dedicated head of Opal for Schools (Andy Bennett) partners with schools, presents at events like SXSW EDU and talks to press.

Workedmarket-selectionword-of-mouth
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

Seen by dozens of millions; still running 1-2 years later

A friend sent the founder an organic video (by a filmmaker, which had gone slightly viral) that looked like an Opal ad but wasn't. A team member (Marjorie) DM'd the creator asking to license it; he turned out to be an Opal user inspired by the app and agreed. The ad is literally the organic video with the Opal logo attached. Since then Opal repurposes more organic creator videos and commissions new ones, helped by many filmmakers/designers already being users.

Workedpaid-socialugc-creators
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

0 to ~700K followers and millions of views in a few months

Found a TikTok creator (Olivia) who mentioned Opal in a video and hired her onto the team. She runs 'Olivia Unplugged', a creator account (not the Opal brand account) making educational content on screen time and focus, from making friends offline to bedtime routines. Opal is mentioned in videos and linked in bio.

Workedorganic-short-videougc-creators
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

Biggest win of the year for retention and growth; no numbers

Opal counts its own kind of streak: the more you focus, the more the streak grows. Shown as a custom animated flame (not an emoji), with Opal gemstones unlocked at streak milestones.

Workedretention
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

The app's most loved moment; users remember it and talk about it

The whole experience revolves around gemstones (the name Opal is a calming gemstone). When users pass a milestone (e.g. a number of days using the app) they are granted a new gemstone and tap to crack it open to reveal its color and shape. Took a few weeks of investment despite not being measurable and competing with more urgent features and bug fixes.

Workedretentionproduct-virality
Sub Club by RevenueCat · 2026-04-29

Opal · screen time and focus app

No effect on downloads or revenue; helped close one school deal

Bought a large billboard in New York with the message 'Scrolling Kills', intentionally without clear attribution (no opalapp.com or 'get Opal'). Intended as a brand statement; the phrase is now tied to Opal in search (scrollingkills.us).

Mixedoffline-ads
Sub Club by RevenueCat · 2026-04-29

Made PSA-style stickers reading 'Scrolling Kills' that deliberately do not mention Opal, and distributed thousands to customers and users to spark the conversation.

Unknownword-of-mouthcommunity
Sub Club by RevenueCat · 2026-04-29

Numbers mentioned

WhoMetricValueContextWhen
OpalarrUSD 5M
approximate
ARR at the time of the previous podcast appearance
OpalarrUSD 10M
approximate
Reached with a hard paywall before switching to freemium
Opalteam size11 people
approximate
Headcount when Opal reached $10M ARR
Opalusers1M users/day
approximate
Daily active users, 'over a million'
Opalconversion rate20%
approximate
Pay penetration (paying subscribers / monthly active users) under the hard paywall, before freemium
Opalconversion rate9%
approximate
Pay penetration (paying subscribers / monthly active users) after switching to freemium
Opalrevenuepays back tenfold in the long term
illustrative
Long-term revenue payoff of going freemium; no figure given
Opalshare66.7%
approximate
Share of DAUs who are high school or college students (segment unlocked by freemium)
Opalcount3 blocksNumber of blocks (scheduled app blocks / open limits) given to free users after testing 1 to several
Opaldownloads10M downloads
approximate
More than 10 million downloads
Opalretentionon par with or better than Duolingo, Spotify, Strava
estimate
Early retention, day 1 to day 7
Opalviewsdozens of millions of people
approximate
Reach of the licensed organic video run as an ad
Opalfollowers700K followers
approximate
Olivia Unplugged, Opal-powered creator account run by a hired user, across platforms; grown from 0 in a few months
Opalviewsmillions
approximate
Views on the Olivia Unplugged account in its first few months
Opalcountthousands
approximate
Unbranded 'Scrolling Kills' stickers distributed to users
marketPeople worldwide with a smartphone (addressable market for screen-time apps)market size5,000M people
approximate
marketPeople who have used or use a screen-time appusersa few dozen million
estimate