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• Signal Engineering: Strategic Data Filtering for Better Ad Performance — Thomas Petit, Independent Consultant

  On the podcast I talk with Thomas about using signal engineering to optimize ad spend, how AI is changing creative testing, and why most people should avoid app2web… for now.Top Takeaways:🧠 The biggest AI opportunity in ads is smarter analysis, not faster productionAI is now good enough to produce ad-quality video and variants at scale — but that’s where 95% of the industry focus stops. The underused frontier is AI for analysis: spotting winning hooks, predicting performance, and even pre-testing creatives with “AI humans” before spend. The teams that combine rapid AI production with AI-driven analysis can iterate faster and scale what works more reliably.🔍 Signal engineering starts with fixing broken dataIf the events you send to ad networks are inaccurate or poorly mapped, you’re sabotaging the algorithms. First step: make sure event counts match internal analytics within ~5–10% (not 30–50%). Then move from “normal” to “sophisticated” by filtering for quality — for example, optimizing to high-LTV trial signups instead of all trials — and sending value-adjusted revenue that reflects predicted LTV, not just day-one spend.⚖️ Balance exploitation of winners with exploration of new conceptsWhen a creative crushes it, it’s tempting to flood your account with variations. But over-reliance on a single concept speeds fatigue and leaves you exposed when performance drops. Keep iterating on winners and testing new hooks in parallel — especially on fast-moving platforms like TikTok, where trends expire in weeks.🌐 App-to-web works best for big brands with deep resourcesMoving checkout to the web can bypass app store fees, but it’s a high-commitment experiment. Success usually requires brand trust, team bandwidth, and a well-tested flow — often with different plan structures than in-app. For most smaller teams, the opportunity cost outweighs the benefit. “Saying no to good ideas” is often the smarter prioritization.💳 Hybrid monetization is powerful, but not plug-and-playCombining subscriptions with one-time or usage-based purchases can capture more revenue from different segments — especially for AI-powered apps with real compute costs. But designing it to avoid cannibalizing subscriptions is complex. Treat hybrid as a later-stage lever: exhaust easier wins in pricing, packaging, and paywall optimization first, then experiment, possibly starting with Android or non-US markets. About Thomas Petit: 👨‍💻 Independent app growth consultant helping subscription apps like Lingokids, Deezer, and Mojo.📈 Thomas is passionate about helping subscription apps optimize their ad spend and increase ROI through smarter testing.💡 “The whole idea of signal engineering and optimization of the data that you're sending back is: send the network something better, and they're gonna do a better job. They are doing a better job — it's you who are not doing yours.”👋  LinkedInFollow us on X: David Barnard - @drbarnardJacob Eiting - @jeitingRevenueCat - @RevenueCatSubClub - @SubClubHQEpisode Highlights: [1:21] Testing smarter: How AI may be changing the game for testing ads.[13:09] Untangling the web: App-to-web can work for some, but it’s not a slam dunk.[21:19] Hedge your bets: The benefits of moving away from subscription-only and embracing hybrid monetization strategies.[26:50] Going global: When and why to consider experimenting with hybrid monetization outside the US.[31:15] Signal vs. noise: The signal engineering framework for sending the most valuable user interaction data to ad platforms.[44:47] Multi-platform: Optimizing your data and event mapping for multiple ad networks.[53:01] Low-hanging fruit: Scoring easy wins with signal engineering.[1:08:04] Hands-off: Why ad networks likely won’t (and maybe shouldn’t?) implement built-in signal engineering tools for app marketers.[1:14:05] Going deep: Advanced signal engineering techniques.[1:26:09] Volume vs. quality: Why sending fewer events to ad networks may actually yield better results.

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• Optimizing Funnels, Pricing, and Retention at Zumba — Nicole Page & Lucy Levy, Zumba

  On the podcast I talk with Lucy and Nicole about how customer-driven iteration led Zumba from VHS tapes in 2001 to launching an app in 2024, their app2web experiments that boosted LTV by 17%, and how they are able to charge for content when countless Zumba classes are available for free on YouTube.Top Takeaways:🗣️ Listening has driven 24 years of product evolutionEvery Zumba breakthrough — from instructor certifications born out of VHS buyer calls, to an app tailored for shy beginners — came directly from customer insights. The roadmap is data-led, not intuition-driven, ensuring they're always building what users genuinely want.🎯 Subscribers pay for structured programs, not endless contentZumba realized users were overwhelmed by free YouTube videos. By creating curated, goal-oriented programs, subscribers now watch twice as many videos and retention doubled. People will pay for guidance and curation — not just more content.🚀 Your growth ceiling depends on beginner retentionWith 70% of new users identifying as beginners, Zumba redesigned onboarding and UX to quickly move them toward completing three classes. Annual-plan signups reached 60%, and churn dropped dramatically. Early milestones for beginners unlock long-term growth.🌐 Web checkout can lower conversion yet raise revenueZumba shifted paywall taps to a simplified web checkout with Apple Pay and Google Pay. Immediate conversions dropped 25%, but higher annual plans, better retention, and no store fees drove a 17% lift in LTV. Optimize for long-term value, not just instant conversions.🔁 Speed of iteration beats legacy processes every timeZumba’s lean, agile team tests and pivots relentlessly — from paywall pricing to removing unsuccessful features. Daily checks in Mixpanel dictate what scales or what’s cut. Moving quickly and iterating beats established practices and keeps growth steady.About Nicole Page & Lucy Levy: 📱 Nicole Page is Senior Product Manager at Zumba, leading app development with a focus on user research and fast iteration. From onboarding experiments to web-first paywalls, she brings a data-driven mindset to every launch.💡 “Every launch is a hypothesis we’re testing, and we’re never afraid to pivot if the numbers tell us to.”👋 Nicole🚀 Lucy Levy is Chief Consumer Officer at Zumba, guiding the brand from VHS to app, boosting LTV 17% along the way with innovative strategies and beginner-focused design.🌍 Together, they’re modernizing Zumba’s global community.👋 LucyFollow us on X: David Barnard - @drbarnardJacob Eiting - @jeitingRevenueCat - @RevenueCatSubClub - @SubClubHQEpisode Highlights: [00:02:44] From VHS to app store: How three Albertos turned dance fitness into a global brand.[00:06:26] Community is the product: Why Zumba built its business around instructors, not just workouts.[00:11:01] Research at scale: How hundreds of interviews revealed why “The Shy Beginner” is their most important user.[00:14:30] Better churn than never: Why people leaving the app for live classes still counts as a win.[00:15:54] Can’t compete with free? Yes you can: The Zumba app’s curated programs outperform YouTube.[00:17:25] Double the value: Adding structured programs led to twice the content engagement and better retention.[00:20:04] Cracking community: Why their first chat-based social feature failed and what they’re planning next.[00:22:56] Test everything: Zumba’s app team operates with a growth mindset inside a 24-year-old company.[00:25:22] Data before breakfast: Why daily Mixpanel check-ins drive fast iteration and culture change.[00:26:09] App-to-web win: How a 25% drop in conversion still led to a 17% lift in LTV.[00:30:19] Checkout optimization: Using Stripe, Apple Pay, and Google Pay to simplify the paywall experience.[00:35:07] Push, don’t annoy: The team’s smart notification timing strategy based on user habits.[00:38:44] Beginner, please: 75% of users identify as new to fitness, so the app is built just for them.[00:39:01] Add friction, raise conversion: How a longer onboarding flow improved paywall success.[00:40:51] One class to hook them: Why Zumba offers just one free class before locking the app.[00:43:25] Three’s the magic number: Users who complete three classes are much more likely to stick.[00:44:56] No trial, no problem: Ditching the monthly trial increased upfront revenue and annual plan adoption.

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• The Past, Present, and Future of Building on Apple — John Gruber, Daring Fireball

  On the podcast I talk with John about the fascinating 40-year history of Apple’s developer relations, how almost going bankrupt in the 1990s shaped today’s control-focused approach, and why we might need an ‘App Store 3.0’ reset.Top Takeaways:🕹️ The 1980s: Apple’s developer DNA was born  Apple’s earliest wins came from nurturing third-party developers, even spinning off its own apps to avoid competing with outsiders.💸 Microsoft saved Apple (literally)  Apple’s near-bankruptcy in the ’90s made them both humble and wary—forever shaping how they deal with developers and competition.🍎 From “please build for us” to “we choose you”  WWDC 2008 saw Apple begging for apps and evangelist emails on slides; today, it’s the other way around.🖥️ The “Delicious Era” fueled iPhone success  Mac indie devs (Panic, Delicious Monster, Bare Bones) built a design-obsessed, passionate community—setting the stage for the iPhone App Store boom.🚪 App Store 1.0: A new world for indies  For the first time, solo developers could launch businesses from home. No server costs, no payments hassle—just build, submit, and sell.🏦 Apple’s rules got stricter as the App Store grew  As the App Store became a services giant, the partnership vibe faded. Developers went from partners to “users” of Apple’s marketplace.📉 App Store math now feels upside down  Today, indie devs can pay Apple millions, while giants like Meta pay almost nothing. The fee logic and incentives don’t fit 2025.⏳ The platform needs an “App Store 3.0” reset  John and David call for a new era: lower fees, clearer rules, and Apple acting as a true platform partner—not just a toll booth.🔄 Developer enthusiasm is Apple’s long-term moat  Apple risks becoming a “legacy only” giant if it loses developer goodwill. The most important apps are still built by outsiders.👥 A generational handoff is coming  With Apple’s senior leadership nearing retirement, now is the time to set new priorities: empower developers, invest in the ecosystem, and ensure Apple’s platforms stay vibrant for decades to come.About John Gruber: 🚀 Author of the Daring Fireball blog, host of The Talk Show, and co-creator of Markdown.🍎 John is a lifelong Apple fan and is passionate about discussing all things iPhone, App Store, and developer relations.💡 “I feel like Apple is dwelling on the success and the innovation that completely revolutionized the phone industry […] for too long and that they should move on and build something else new.”👋  Daring Fireball Resources: Bill Gates in 1984 promoting Apple Macintosh Bill Gates on stage with Steve Jobs in 1983The Macintosh Way — Guy KawasakiCocoa Programming for Mac OS X — Aaron HillegassDaring FireballFollow us on X: David Barnard - @drbarnardJacob Eiting - @jeitingRevenueCat - @RevenueCatSubClub - @SubClubHQEpisode Highlights: [0:00] Apple Kremlinology: Why understanding Apple requires a special kind of obsession - and a long memory.[4:58] Fanboys unite: David shares how his love of Apple led him from audio engineer to App Store developer.[8:48] Turning point: John’s link to David’s iPhone mileage app in 2008 helped jumpstart his indie career.[13:37] Joz, Phil, and Eddy: The developer relations and most of the App Store are overseen by three Apple execs who joined in the ‘80s.[17:01] The crossroads: How Apple’s early decision to unbundle first-party apps in the ‘80s encouraged third-party innovation.[21:25] Hands off: Why Apple’s decade-long retreat from building software paved the way for a thriving developer ecosystem.[27:07] Vision parallels: John compares Vision Pro’s slow start to the original Mac - and explains why it doesn’t have to be perfect (yet).[30:32] Betting on the future: How Apple playing the long-game is their biggest advantage in launching and sustaining new platforms.[33:55] What comes after the Mac: The ‘90s were filled with failed next-gen Apple platforms - and it almost killed the company.[36:47] Burned by success: Apple’s trauma from near-bankruptcy shaped their need to control developer relationships.[41:13] The App Store revolution: Why the 2008 launch of the App Store wasn’t just a business move, it was a turning point for software itself.[45:07] Developer momentum: How passionate indie devs and Mac software of the 2000s primed the iPhone for success.[53:46] iPhone jailbreakers: Why the jailbreak community may have pushed Apple to launch the SDK sooner than expected.[57:39] App Store 2.0: In 2016, Apple dropped some commission rates, opened up subscriptions, and kicked off a new era.[1:03:03] Time for 3.0: Why David believes the App Store needs another reset - and a shift in mindset.[1:08:26] Humility and hardware: Steve Jobs’ 1997 apology to a developer at WWDC still echoes - and it’s exactly what developers need to hear in 2025.[1:13:30] Holding on too tight: How Apple’s fear of losing control is costing them developer goodwill.[1:26:35] A legacy worth protecting: The iPhone isn’t going anywhere - but without change, Apple could become a legacy business as other platforms take over.[1:32:06] Red flags on Vision Pro: Why developers aren’t building for Apple’s newest platform - and why that should worry Apple.[1:39:18] The indie paradox: How small developers pay millions to Apple, while giants like Meta pay almost nothing.[1:41:39] Fluke of history: Schiller once floated capping App Store revenue at $1B. What if Jobs had said yes?[1:44:35] The trust gap: Could a more generous App Store policy bring Netflix and others back?[1:47:08] It’s not too late: Why Apple should proactively change the App Store instead of waiting on regulation.[1:57:26] Developer vibes: A simpler App Store (with clearer rules and lower fees) could renew trust and drive innovation.[2:00:29] Bigger than profit: Making great soft...

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• Turning a Side Project into a Six-Figure Subscription Business – Eric Duffett, Shot Pattern

  On the podcast we talk with Eric about his journey from a failed first app to success with his second, the advantage of building for problems people are already talking about, and why he turned down a lucrative acquisition offer to keep building.Top Takeaways:🔍 Demand-first discipline winsTesting for willingness to pay before writing a line of code can spare you five years of false starts. Quick interviews or landing pages that capture real purchase signals reveal genuine demand—an indispensable early litmus test against building in a vacuum.🔄 Ride existing habitsRather than convincing users to adopt completely new rituals, plug into behaviors they already practice. When pros were manually measuring holes on satellite maps, the real breakthrough was automating that exact process in real time—sidestepping the steep education curve of a brand-new workflow.🛑 Bet on a long-term vision, not a quick exitAn early $75K acquisition offer can feel like a no-brainer, but sometimes the best move is to walk away. Turning down a strategic buyout kept ownership in entrepreneurial hands and paved the way for multiples of that valuation through continued iteration and growth.💼 Treat side projects like businessesA side hustle stays a hobby until you put real money on the line. Investing $5K in core data and infrastructure forced a shift from tinkering to professional-grade execution—transforming assumptions into data-driven priorities and unlocking deeper product opportunities.🤝 Niche community fuel sparks growthNo launch strategy outpaces genuine community engagement. By sharing expert tips in specialized forums and social channels before and during build, small audiences morph into early adopters, trial converts, and your most effective brand advocates.Resources Very Good Ventures (Website)Seth Miller (LinkedIn)Curtis Herbert (LinkedIn)Eric’s story (RevenueCat blog post)Follow us on X: David Barnard - @drbarnardJacob Eiting - @jeitingRevenueCat - @RevenueCatSubClub - @SubClubHQEpisode Highlights: [3:24] If at first you don’t succeed: How (and when) Eric realized his first app, Undaunted Golf, didn’t have good product-market fit.[7:28] Try, try again: Why Eric’s second golf app, Shot Pattern, was a success.[11:21] If you build it: Instead of just launching on the App Store, Eric implemented a content marketing strategy to promote Shot Pattern.[13:18] Back to black: How Eric’s $5,000 upfront investment in Shot Pattern unlocked some key product differentiators and paid off in a big way.[20:23] Sell, sell, sell?: After receiving an acquisition offer from a potential buyer, Eric used RevenueCat’s app benchmarks to analyze Shot Pattern’s performance data and determine a rough valuation.[25:06] Have a little faith: What happened when Eric turned down a $75,000 buyout offer and kept working on Shot Pattern.[31:25] Video games: How Eric increased Shot Pattern’s annual revenue to $185,000 with video ads.[37:24] Quit your day job: What would make Eric consider quitting his full-time teaching job to focus on his growing subscription app business.[39:18] One-man show: Besides partnering with some content creators, Eric does most of the work for Shot Pattern by himself.[42:25] Success story: How RevenueCat helped Eric launch and grow a successful app business that changed his life.

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• WWDC 2025: What Subscription Apps Need to Know

  On the podcast, I talk with Charlie about why Liquid Glass represents a big opportunity for new and existing apps, Apple’s new on-device AI models and their practical limitations, and why the improved App Store Analytics complement rather than replace third-party tools like Appfigures and RevenueCat.Top Takeaways:🫧 A style refresh is a growth hackA major UI overhaul—like Apple’s new “liquid glass” design—creates a once-in-cycle chance to stand out. Apps that ship the new look on day one dominate screenshots, roundup articles, and “App of the Day” slots. It’s free reach: adopt the guidelines early, respect the new hierarchy (avoid stacking glass on glass), and you can siphon users from slower rivals without a bigger ad budget.🎯 Keywords deserve their own landing pagesYou can now pin specific search terms to specific custom product pages. A running-focused page for “5k training,” a cycling page for “bike tracker,” each with its own screenshots and messaging. App Store Connect then breaks analytics down by page, turning guesswork into clear attribution. The result: higher paid-per-download and a shortcut to segment-level A/B testing—no SDK required.⚡ Tiny, local AI = instant delightApple’s on-device foundation models aren’t GPT-4, and that’s fine. Their super-fast, private inference (with a 496-token context window) shines at micro-tasks: sentiment tags, quick text rewrites, lightweight image badges, feature-name suggestions. Treat them as edge helpers, not flagship features. For deep research or long context, hand off to a cloud model. Paired wisely, the mix keeps experiences snappy without sacrificing quality.🪟 Build like screens will foldiPadOS 26 finally lets apps run true windows, offload background work, and juggle tasks like a desktop. That’s great for tablets today and a rehearsal for rumored foldables tomorrow. Audit your layouts: do panes resize gracefully? Can a process finish if the user drags your window aside? Investing in this responsiveness now means you’re launch-ready when new form factors arrive.🔑 Promotions should be measurableOffer codes used to be subscription-only; now they work for consumables and one-time purchases too. You get up to ten trackable code groups (each with up to a million codes) plus UTM-style links and the expanded App Store analytics to see which podcast promo, TikTok ad, or partner giveaway actually drove revenue. You can finally run seasonal sales or affiliate deals without duct-tape spreadsheets and double down on what moves the needle.About Charlie Chapman: 👟 Senior Developer Advocate at RevenueCat and indie app creator behind a suite of iOS and macOS tools.🎯 Charlie blends indie instincts with platform insight, translating Apple’s latest changes into real opportunities for developers.💡 “Don’t build a chatbot around this (on-device models). But if you’re looking for a fast, free way to make your app better in small, thoughtful ways, the new on-device models are really interesting.”👋  LinkedInFollow us on X: David Barnard - @drbarnardJacob Eiting - @jeitingRevenueCat - @RevenueCatSubClub - @SubClubHQ

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