RoboKiller · B2C · spam call blocker app
Tell users how many millions of spam calls you blocked for everyone this month
Unknownretentionnotifications
What they did
Apple limits on user-level call data and the company's own privacy layer made personal stats hard, so RoboKiller showed stats across the whole user base (millions of calls blocked this month) to prove the background app was working.
In their words
Sub Club by RevenueCat · Why Most Apps Hit a Revenue Ceiling (and How to Plan for It) — Patrick Falzon, The App Shop“So, instead of giving you necessarily personalized stats, we would give you stats across the whole user base of we've blocked this many millions of calls this month for our users.”
Related topics
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More from this episode
- Mosaic Group: Only buy or build apps that could reach tens of millions without outspending giantsBuilt one of the leading app portfolios; sold to Bending Spoons
- Mosaic Group: Build several $30M apps instead of pushing one app past its ceilingGuest's answer to the $10-30M ceiling; three $30M apps can beat one $90M app
- Mosaic Group: Launch a new app for a new use case instead of piling features into oneGuest says slim apps segment users better and can earn more; no numbers
- RoboKiller: After the base subscription, offer data broker removal as a paid add-onReally successful; a good way to raise revenue per user (no numbers)
- Mosaic Group: Estimate lifetime value as a range of weighted guesses, then narrow it monthlyLets new products act on LTV before years of data exist; no numbers
- Mosaic Group: Count only 2-4 years of revenue per user and require fast payback early onConservative at worst; high LTV:CAC shows how much more spend cash could unlock
- Mosaic Group: Before rolling out a price test winner, check it still wins if retention drops 10-50%Annual-heavy price calls sometimes proved wrong a year later; this guards against it
- Mosaic Group: Raise prices about 10%; retention usually drops only a couple of percentNet LTV wins most of the time across the portfolio, if conversion holds
- Mosaic Group: Use early subscription cancellations to predict who will churnDidn't work: few cancel early; most cancel near the renewal reminder
- RoboKiller: Track whether each user is getting the core value, and step in when you fail themA wrongly handled call was highly correlated with churn, triggering fixes
- RoboKiller: Publish your own spam call data so reporters and regulators cite youRepeated WSJ, FT and cable news mentions; a brand halo that drove many organic installs
- Mosaic Group: Move ad designers to a different app every couple of monthsMore varied creatives, so winning styles became clear; no numbers
- Launch one ad channel at a time and change one bid per monthGuest's post-ATT method; new channels almost always underperform early forecasts
- Apalon: Switch apps from one-time paid downloads to in-app subscriptionsPhenomenal growth after the switch (no numbers)