Getting users
Virality and word-of-mouth tactics
Sharing loops, invites, watermarks and other ways apps got users to bring in more users. 154 tactics from 107 founder interviews.
Most founders built sharing into the product itself, through score cards, result screens, branded links and invite rewards, so each user showed the app to someone else. When the shared thing was visual or playful, spread was fast and large. Referral rewards gave mixed results, several viral hits never turned into revenue, and apps for parents or dating found that users would not share them.
- GeoSports let players share their score after every round and reported a 53% share rate, about 98% of traffic from word of mouth and over 1M players in under a month.GeoSports
- Invite-to-unlock offers spread widely: GlamUp and Sprout let users skip paying by inviting 3 friends, logging about 1.6M code requests with conversion barely changed, and Opal's free year for 5 invites raised the share who invited anyone by 80%.GlamUpOpal
- Putting the brand on what users share brought steady traffic: Supademo said about 30% of visitors come from shared demos, watermarks and referrals, and Stagetimer said about a third of its traffic is word of mouth.SupademoStagetimer
- Reach did not always mean revenue: a PDF-to-brain-rot side site got a 41M-view video but no paying users and was shut down, and Streema hit 130K new users a day while earning about $100.pdftobrainrot.comStreema
- Referral programs often fell flat: Lose It! dropped a $10 gift card offer after a year when it only broke even and never scaled, Life360's share buttons failed, and Hily found people won't share dating apps by link.Lose It!Life360Hily
- Giving more away grew the base at a cost: Opal dropped its hard paywall and its paying share fell from about 20% to 9%, but organic growth, daily users past 1M and revenue all rose.Opal
Summary written 2026-09-29 from the tactics below. Figures are as founders stated them.
What worked, most detailed first
What didn't work, or only partly
- Duolingo: Make paid features free when a test shows they earn littleTook a small revenue hit on purpose to grow free users
- Lose It!: Give users a $10 gift card when a friend they refer upgrades to premiumRoughly broke even but didn't scale; exposed users had lower LTV; killed after a year
- Life360: Add in-app share buttons and gifted subscriptions to copy parents' word of mouthFailed across the board; parents don't share inside apps
- Clubhouse: Launch invite-only with celebrity users and just two invites per personWent viral during COVID, then collapsed
- pdftobrainrot.com: Launch a viral 'PDF to brain rot video' side site to funnel users~41M views on one video, but no paying users; shut down
- Streema: Use Facebook app notifications to spread a radio app virallyPeaked at 130K new users a day but earned $100; Facebook shut it down
- BoldVoice: Ride a TikTok trend of people crying over their low app scoresOne creator got ~300M views in a few months, no ads; lower intent than paid
- Walk around campus telling students about a student marketplace app~800 users but no revenue
- Give costly AI features away free to grow fastFast growth, but unit economics usually catch up later
- ElevenReader: Watch Reddit, Discord and X for what people share, then push itUsers post screenshots of surprising voices; still iterating
- Hily: Add invite-a-friend and sharing features to a dating appDidn't work; people won't share dating apps via links
- Deezer: Make the free tier pay for itself with ads and use it to win subscribersFree users now profitable; conversion from free 'not cracked yet'
- Opal: Let users see their friends' screen time, with phone number sign-inSlight uplift in tests; some users invite friends
Companies in this topic
More tactics (129)
- Live Tourney: Print a QR code on scorecards that opens a live leaderboard, no app install
- GlamUp: Put the app name in the copy-paste referral message so TikTok search ranks itSearching 'GlamUp' on TikTok shows only their content; founder claim
- Once: Scroll your X, LinkedIn and Instagram friend lists and ask anyone with an upcoming event4 friends agreed to try it: a Halloween party, birthday, wedding and networking event
- Pingo AI: Let users write their own scenes for the AI so creators can script funny videosCreators found the viral 'mean Pingo' format with it; users now ask for a mean mode
- Mail-Lead: Put an 'automation' button in the side tool that opens your paid main productFounder says it drove paid users into the main product; no separate numbers
- Parakeet Chat: Give users about a month of free credits when someone they bring in starts payingFounder says it helped; no numbers
- Flamme: Hide your partner's answer until you answer the question yourselfCreated a back-and-forth loop credited with lifting retention; no separate number
- DaGame: Turn a trending meme into a simple game overnight and release itAbout 2M downloads in a month; #2 on the App Store
- Run dozens of branded Instagram accounts that comment on viral Reels in your niche~300K comments brought ~7K clicks; 4x return projected halfway throughGray hat
- BeReal: Hide friends' posts until the user posts their own70% of users post; almost no passive users
- BlogToPin: Watch every user's screen recordings and build requested features within daysWord of mouth became a top-three channel; strangers now sign up on their own
- Lovely: Tweet your launch with a public goal, then quote-tweet every update40K downloads overnight, 10K from Russia in a day; added $2-3K MRR
- Lobby: Track how many new users get 5 friends on day one, then build for it60% vs 20% hit 5 friends in Israel vs elsewhere; D90 25-30%, about double
- Scanemon: Put the app's name on the scanner screen so every video shows itFounder thinks it lifts conversion; no data yet
- Jungle: Show a tree that grows on screen as students answer questionsCore engagement up 70%; onlookers in libraries ask about it
- Copia: Add a big red 'crash out' button riding a viral trend; post a slideshow12-13M views and 10-15K downloads from one two-slide TikTok
- Series: Turn 12 show spots into a race, with an invite-your-friends challenge~2,500 applicants, 150 racers; top racer invited 120 people in a day
- NGL: When Instagram opens Story links to everyone, rebuild an old viral idea on it150M monthly users; more downloads than YOLO, Yik Yak and ask.fm
- NGL: Say 'Get your own messages' instead of 'Download this app' after someone sends oneVery high share of new visitors go straight to the App Store
- Bags: Give most of the 1% trading fee to whoever invited or tipped off buyers
- Stagetimer: Put your logo with your web address on every link people shareAbout a third of traffic is word of mouth; people say they saw it at an event
- Sweatcoin: Show two ways to earn on the home screen: walk, or invite a friend for 5 coinsNew users went from under 300 a day to 300, 1,000, then 5,000 a day
- Sweatcoin: Unlock a secret prize shop after 30 successful invites, for creators with small followingsSpread 'like wildfire'; about 5% of all users came this way
- Quizlet: Estimate word of mouth from direct, branded-search and social signups per active userRevealed back-to-school and exam spikes in edtech; no numbers
- Hevy: Charge $24 a year and don't keep testing prices, so users happily tell friendsGrew to 2M users on word of mouth; guest admits revenue isn't maximized
- Headspace: Give referred friends a 30-day free trial instead of 14, with no cash rewardHigh trial redemption and good conversion from referred friends; no numbers
- Fitbod: Let subscribers share a link that gives friends 6 free workouts instead of 3Has driven users, per founder; built mainly to measure the word-of-mouth loop
- Strava: Show 'Follow back' on anyone who follows you, wherever their profile appearsBiggest jump in follow rate Strava has ever seen, despite data predicting little gain
- ZenMaid: Advertise a free-forever plan; require a card and give 14 days of paid features~40% more trials; more mentions in Facebook groups
- Papermark: Make shared links use your domain unless users add their ownFounder says most growth is organic and word of mouth; 60K+ teams
- Value Study: Reply personally to every support email and fix bugs right awayMany reviews name the founder; turned angry users into five-star reviewers
- GeoSports: Let players share their score after every round53% of players share; ~98% of traffic is word-of-mouth; 1M players in under a month
- GeoSports: Build for the web first so people can play straight from XFounder credits near-zero friction for going viral on X
- GlamUP: Swap text makeup tips for a face scan showing your before and afterStarted going viral on TikTok; founder gives no numbers
- BoldVoice: Add city-level results to the free accent tool to spark a new viral waveProduced another viral boost; no numbers
- BoldVoice: Show a sample of the full in-app results to push web users to the appFounder says it boosts web-to-app conversion; no numbers
- Symmetry: Add ranks, streaks and a friends feed to workout trackingRanks are the most-liked feature
- Visible: Offer a free app without the wearable so people can try before buyingA big chunk of acquisition, all word of mouth; barely promoted
- GlamUp: Swap text makeup tips for a face scan showing your before and afterWent viral on TikTok; app hit 1M users in 6 months
- Spend day one researching the niche and day two sketching the screen meant to go viral
- Erly: Turn a plain app into a push-up alarm using Apple's new alarm APIBecame the hook in every video; $50K/month within 4 months
- SideShift: Pay creators yourself when a brand fails to pay themExtreme creator loyalty and referrals; costs up to ~six figures/month
- Cal AI: Let users post progress photos, meals and streak badges to Instagram storiesA lot of users share progress and meals; no numbers
- Opal: Drop the hard paywall and give the core app away for freePaying share of users fell 20% to 9%, but organic growth, 1M+ DAUs and revenue rose
- Opal: Sell the app to schools as a phone policy after students asked for itGrew from one school to many US high schools; front-page LA Times coverage
- Opal: Let users tap to crack open a gemstone when they hit a focus milestoneThe app's most loved moment; users remember it and talk about it
- Pingo AI: Only build an app whose main feature looks interesting on videoTalking to the AI became the core of every video; app reached ~$500K/month
- Gamma: Let the decks and sites users make get shared and show up in searchGrew with very little paid acquisition; valued at $2B+
- Parakeet Chat: Show the first version to a few people inside and let them spread it200 users in the first month; all growth since is word of mouth, $1.5M lifetime
- Super Unlimited: Keep the free service running in poor and censored countries, even at a loss15M downloads in 4 days during a Turkey Instagram ban; each spike leaves a higher baseline
- Methods: Have your own creators post videos about your app, which recruits more creatorsFounder calls it an 'infinite user' loop; no separate numbers
- Design the app's screens and loading animation to look good on TikTok
- Lancer: Ask a beta user to introduce you to their coach, then just demo the productCoach was blown away and has referred every client since
- Ladder: Add a home-screen calendar widget that lights up workout days, and show how to install itAbout a third of users have it; guest sees it correlate with retention
- Skylight: Survey customers on whether the product is life-changing, and build to raise that shareAbout 20% say life-changing today; goal is 50%
- RevenueCat: Launch a mobile app with a home screen people want to screenshotAbout 100x more sightings on X overnight; mobile usage near dashboard usage
- Postiz: Make your whole app free to self-host and charge for the hosted version$17K MRR in a crowded category; daily posts from developers self-hosting it
- Momego: Let riders share a live trip link that opens on the web without the appFounder says people love it; no numbers
- Calm: After a meditation, let people share a quote card with your logoPeople do share them on Instagram, host saw
- Zero: Send a weekly recap of the longest fast with a button to tweet itPeople did tweet it; the feature was later dropped
- Algrow: When someone in the group asks for help, solve it with your tool instead of pitchingWord of mouth took off; new users said a friend told them
- Algrow: Give your earliest users free access so they show it to friends who payFounder credits it for the fast early growth; no numbers
- Revid.ai: Build a feature within an hour or two of a user asking for it on XFounder says requesters become vocal advocates; no numbers
- Tinder: Keep dating free for most users so there are plenty of people to match85-90% never pay; the 10-15% who do fund the business
- Pushcroll: Rebuild push-up tracking to work from the front so faces show on video
- Cursor Directory: Open-source the site and let users submit and upvote their own entriesMaintenance down to ~3 hours a month; 49K registered users
- Ask diners to post reviews in the local restaurant Facebook groupFounder says the posts spread FOMO; part of the 2-month sellout
- Stronger: Design every feature to look great as a screenshot for social postsScreenshots are the main money-maker; founder claim, no numbers
- Stronger: Turn workout numbers into a strength rank users can show off12 months with no copycat; became the main marketing asset
- Subway Surfers: Let anyone use the game in their videos, and repost the cool onesCreators, including a K-pop star, make unpaid content; the game became a meme format
- NGL: Have every user post their link, so friends who quit see it and returnChurn offset by a very high redownload rate; still popular 3 years on
- SideShift: Visit 25 college campuses in person to sign up the first usersFirst 10-20K users; strong word of mouth among college students
- Bank Statement Converter: Stop ads and spend your time fixing whatever customers complain about2-3 organic sign-ups a day, growing to $40K MRR from $6K in 2022
- Stagetimer: Offer a free plan so freelancers bring your tool to every event they workFounder says free users hitting limits and upgrading 'happens very often'
- Tolan: Hire artists to make a bright, cute character that looks great in videosLow install costs even on paid; users show it to friends and post it unprompted
- Duolingo: Ask active users to bring back friends who stopped using the appOne of the best-performing winbacks; beats app-sent messages, even from leaderboard strangers
- Sweatcoin: Kick off spikes with friendly creators, then let fast invite chains push store rankings#1 app in the US, Brazil and 65 other countries; now stable growth
- Genius Scan: Skip the paywall at signup; show it only when someone taps a paid featureFree users convert over time and recommend the app; no numbers
- Verse: Make a Spotify Wrapped-style feature for your niche and use it as the hookWent super viral; about #1 in the App Store for a few days
- StageTimer: Offer a limited free plan that shows your logo on the on-stage timerWord of mouth is 40%+ of signups; logo effect not measured
- Photoroom: Put 10+ of the app's features on your website as free tools, no loginGuest thinks it pays off long term; no internal numbers
- Mojo: Make a new kind of Instagram story people ask about, so users spread the appGrew to several hundred thousand dollars a month with $0 on ads
- Welltory: Make users' results pretty and easy to post, so they can show offGuest's example: a friend posts his results and keeps coming back; no numbers
- Surfline: Give surfers free daily forecasts, then sell the full version to the keen onesGrows with zero paid ads; free-to-paid conversion up a lot over five years
- Surfline: Publish a surf report page for every beach so searchers land on youSEO is the biggest channel after word of mouth; no numbers
- Quizlet: Let students' and teachers' flashcards rank in Google for long-tail searchesMost important of four growth loops; low-cost acquisition
- Nomorobo: Give landline blocking away free forever to gather data and users for the paid appCost up to $120K a month in phone bills; replaced any ad budget
- TalkingParents: Charge each co-parent separately, so one's video calls nudge the other to upgrade
- Lose It!: Email users when they hit weight-loss milestones and ask for their storyStories feed social, email and in-app marketing; impact not measured
- Hevy: Let users follow each other's workouts and suggest the most active users to newcomersStrangers formed their own groups in-app; main growth engine behind 2M users
- Headspace: Let anyone share a 30-60 second clip of any meditation with a friend
- Headspace: Reward the top referrers with a 1:1 session with their favorite teacher
- Rootd: Ask users to share the app right after it calms a panic attackBiggest share rate after the success screen; founder calls sharing a big growth driver
- Fitbod: Celebrate each logged workout with a shareable progress card, like total pounds liftedFounder says it matters for virality; word of mouth is still a major growth driver
- Strava: Get more people to share workout links, then turn link visitors into signupsDrove new registrations, guest says; base of several hundred thousand shares a month
- Value Study: Win over teachers, who hand your app to a whole class at onceMain growth driver; teachers share with ~30 students at a time; founder says paid outreach to them struggled
- Excel Exercises: Sell team plans to bosses after individual users bring your product to workAccelerated growth from $10K to $30K/month; requests like 50 seats
- TJM Labs: Let happy customers bring in their friends before hiring a sales team~30 pharmacies through customer referrals alone
- Cal AI: Share your growth wins and failures publicly on X, even if it invites clonesClones and 'Cal AI clone' threads drove traffic back; founder claim
- bizdraft: Give away a free AI tool to bring in traffic for your paid productsFounder pleased with early traction; no numbers
- Reframe: Raise money to buy users once each user brings in friendsFounder says organic referrals were already flowing; no spend or return numbers
- SideShift: Pay affiliates a cut of earnings and subscriptions for referring brands and creators
- Avenue: Sign lots of small local businesses first so bigger ones have seen you aroundBigger clients signed because they'd 'seen you guys everywhere'; no numbers
- Practice by Numbers: Grow on dentist referrals, great support and a few trade showsARR ~$2M -> $12.5M from 2021 to 2025
- Cat on Chair: Get your app into Instagram creators' 'favorite apps' roundup postsOne post hit 2M+ views; a Threads reshare doubled downloads and revenue overnight
- Opal: Hand out thousands of "Scrolling Kills" stickers that don't mention the app
- DOWN: Give the app a shocking name people can't help repeatingPeople lit up and wanted to try it; widely covered in the news (no numbers)
- Tolan: Show a shareable card of how the AI character's personality maps to yoursAdvisor calls it a viral artifact people share; no numbers
- Redo the store listing and launch in new countries after buying an appMonthly users grew from 200K to 5M, alongside other changes
- Supademo: Offer a free plan and brand every shared demo so viewers find you~30% of visitors come from sharing, watermarks, referrals and word of mouth
- PhotoRoom: Team up with a hit movie so users can put themselves on its set
- ChartDB: Show up on GitHub, Hacker News and r/selfhosted instead of inventing new channels21K+ GitHub stars and ~250K developers a year; no per-channel numbers
- SteelAlive: Have a friend post about your service in a founder DiscordBrought first design partners and their best clients
- ElevenLabs: Tell users how many hours their voice agents have run, so they share it
- Fitted: Let users share their priciest pieces as a 'neck worth' post
- Jungle: Put share buttons and prompts all through the app30-40% of new users come from word of mouth
- Shepherd: Pause creator videos and build invites for prayer and accountability buddies
- Cursor Directory: Copy the look of sites you love to make yours stand out from lookalikesHost thinks the design drove sharing; no numbers
- Wink: Let people swipe to add strangers on Snapchat, which lacked good friend suggestions70M downloads
- NGL: Add invite screens to every app so paid users bring friendsFounder says it works; no numbers
- Ladder: Let other users cheer you on live while you work outGetting cheered correlated with higher retention; exact numbers not recalled
- Genius Scan: Remove outside ads from the free app, even though they paid wellFounder believes happy free users drive recommendations; no numbers
- Move a Facebook-dependent app toward word of mouth and SEO
- MySwimPro: Test in-app invites with rewards for your most active usersStill being tested; no results yet
- Quizlet: Stay free for years, then add a low-priced subscriptionBuilt a teacher-student network effect; guest says rivals that monetized faster failed
- Sago Mini: Send players of your older apps to your main subscription appAbout 1M installs in a year; filled part of the gap left by lost ad channels
- Focus on making the product good so people tell friends and familyFriend-and-family users convert about 2x better
- Glam Up: Design welcome and onboarding screens to warm users up to payingFounder calls it half of her growth approach; no numbers
- Lose It!: Market the free app through app store search and word of mouth, not ads50M+ users over 15 years, mostly organic
New tactics every Monday
The week's founder interviews, boiled down to what they did and what happened.
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