Founder Playbook · Sub Club by RevenueCat
12 tactics from Chris Hulls
Freemium Done Right: Lessons From a Multi-Billion-Dollar App
Watch the full episode“I hate when we do tests based on percent of user base I hate it... we need to test 1% and you got to put in the bill rights No percents No percents... if you want to do like a paint a door test you should be able to do that on 100 people or 10 people”
Test to 100 absolute users — never test by percent
Chris Hulls calls percent-based A/B testing one of his biggest pet peeves. At 100M users, 1% is 1M people — far too large for a test of something genuinely new. Run fake-door and exploratory tests on absolute Ns (100–1,000 people); if you can't see a signal at that scale, your change is too small to matter. Reserve percent-based rollouts for scaling proven wins (1% → 5% → 10% → 50%), not for discovery.
“you click it and it breaks or you have made some graceful failure You should be able to do that on 100 people or 10 people and well then we're not going to get enough uh predictive power But I'm kind of okay and I paint a door that you get like 70% certainty”
Paint the door before you build the room
Before writing real code for a feature, show 100 users a button or screen for it, let them click through to a graceful failure, then survey them. A fake door to 100 people gives ~70% confidence on intent signal — enough to justify the real build or kill it. Hulls explicitly calls this the alternative to statistically-burdened percent rollouts: get the learning cheap, then commit.
“I actually think killing someone's battery is it's a one-way door not a two-way door... they will forever feel like you're killing the battery And we still have that from a few handfuls of battery bugs”
Battery drain is a one-way door — never fix it twice
At Life360, battery drain and location accuracy are treated as guilt-until-proven-innocent bugs worth chasing even when 80–90% of alerts turn out to be ghosts. The reasoning: a single real battery drain bug is irreversible — users never forgive it even after you fix it, and they churn permanently. Hulls identifies 'one-way door' bugs as a separate class from ordinary quality issues, warranting asymmetric paranoia and resource allocation.
“I don't really mind because we have almost no competition which is weird... people almost uh only bad parents and bad families use location sharing It's creepy I think that was more of the attitude”
Stigmatized categories attract almost zero competition
Life360 reached 80M+ active users in the family-location category with almost no direct competition for 15+ years — because VCs and tech press wrote the category off as 'spying on kids.' Cultural stigma around a real use case is not a red flag; it is a moat. Founders should hunt for categories that are genuinely large but culturally uncomfortable, because stigma repels well-funded competition more reliably than patents.
“Find my came out later Like location's everywhere We would be dead in the water if we tried to... it really helped us because it reduced the stigma that was there... someone's using fine my they've got over the hump that this is a real need and then we're just so much better”
A big-tech free competitor can validate your category for you
When Apple launched Find My, Life360 expected a threat but got a tailwind: Find My reduced the cultural stigma around family tracking and sent Life360 a stream of ready buyers who wanted 'Find My, but better.' A dominant free product from a platform giant can act as top-of-funnel education for your paid product. The key condition: your category has to be genuinely better — not just differentiated — so the validated buyer naturally converts.
“we actually recently just wrote a bill of rights for our free user because it so easy to chip into that... location history and place alerts they must be free doesn't mean we can't move the pay wall a bit but like real value there no deceptive tactics around and dark patterns”
Write a free user bill of rights before you scale
Life360 wrote an internal constitution that enshrines which features must always be free — location history and place alerts chief among them — and bans dark patterns, deceptive UX, and interruptions to the core job-to-be-done. The document exists because at scale it is easy to chip away at free user value one small product decision at a time, each justified by an A/B test, without noticing you have crossed a line. Having it written down forces every PM to explicitly justify any erosion.
“I call I have a doc of hot dogs Like do you hear the Costco hot dog story like you'll never change the price Yeah It's a $149 Yeah And it's like doesn't matter if we're losing margin on doesn't matter It's always going to be a $149”
The Costco Hot Dog list: write down what never changes
Hulls maintains an explicit written list — inspired by Costco's famous $1.50 hot dog that has never increased in price — of core features and prices that will never change regardless of PM pressure or board mandates. The discipline matters because product managers cycle out every 18–24 months; without a written anchor, each new hire re-litigates the same trade-offs from scratch. Apple's long-term product coherence is cited as the same principle applied at platform scale.
“we basically locked in on this strategy of you free location pay for safety and it was the combo of the thing that engages you keeps you top of mind brings you back again and then peace of mind that people pay for”
Free location daily + paid safety: the freemium formula
Life360's freemium formula pairs free location sharing — which drives 22 app opens per day from parents — with paid safety features like crash detection and roadside assistance. Safety is something users pay for but forget about without prompting; daily location utility keeps the product top-of-mind so the safety upsell lands when a real need arises. Without the daily engagement layer, safety alone would be a dormant, low-conversion subscription.
“once you have someone on a subscription you can actually really really squeeze them if you want to We haven't done that I don't think that's we're trying to build a product and brand and platform that people love which means you want to keep a pretty big”
Never go harvest mode — keep subscriptions feeling like a deal
Even with 80M+ active users and $400M+ ARR, Chris Hulls explicitly refuses to move Life360 into 'harvest mode' — raising prices or degrading the free experience to extract maximum short-term revenue. His framing: platform love is the compounding asset; over-monetizing it burns the asset permanently. The practical rule is to keep subscriptions feeling like a real deal, not just a tolerated tax.
“you've taken this away you've taken that away you've taken that away and I don't think we would ever just fall off a cliff... you would need to run hold out for a half a decade You know what I mean and with 20 features in a bucket and it's coming over time So it's almost impossible”
Dark patterns compound invisibly — you need a 5-year holdout
No individual A/B test reveals the cumulative brand damage of 20 small dark-pattern decisions — deceptive CTAs, guilt-tripping cancellation flows, surprise price bumps — because each test looks fine in isolation. The only rigorous measurement would be a five-year holdout group that experienced none of the changes, which is operationally impossible. Hulls treats brand integrity as a non-negotiable constraint rather than a variable to optimize.
“the company that did that the best nothing to do with subscription but Credit Karma... You don't even know it's an ad right you're just using their website... you are actually getting matched with a product and service that is good for you”
Credit Karma ads model: helpful matching beats banner spam
Life360's aspirational ad model is Credit Karma: match driving-score data to insurance offers, or surface an Uber tap-to-book when the app detects a user just landed at an airport. Their internal bill of rights forbids any ad that interrupts the job-to-be-done. Ads that add genuine contextual value convert better than banner spam and preserve trust with the 87.5% of Life360's user base who are permanently on free.
“you can be a good CEO and a bad manager I'm legitimately not a very good manager... the craft changes They're certainly going to bring a different set of like personal values right to the process of building stuff”
CEO and manager are orthogonal skills — own it
Hulls explicitly distinguishes CEO skills (vision, capital allocation, culture, willingness to pick fights) from management skills (developing individuals, executing ops). Product managers at large companies often are not builders at all — they are strategy aligners — and the skills that make a great founder rarely produce a great middle manager. Founders who believe they are failing because they struggle with people management may actually be excellent CEOs; the two roles are not a linear progression.