23+ decks, 1,000+ cards, zero accounts: what we measured running Party Challenges (free 18+ browser party card game)

Party Challenges is a free 18+ browser party card game we built at Inithouse. 1,000+ cards across 23+ themed decks, three game modes (Hot Seat, No Hesitation, Spin It), segments for solo play, couples, and groups. No app install, no account creation, no login wall. You open partychallenges.com and start playing.

We shipped it without accounts on purpose. The product fills a specific moment: someone at a party or on a date night pulls out their phone, and the game needs to be running in seconds, not after a signup flow. Here is what running a no-account game product taught us about what you can and cannot measure when you have zero user records.

What we actually track

Without accounts, our data sources are GA4, session recordings (Clarity), and aggregate database queries. No user IDs, no cohorts tied to individuals, no email list.

What we get: sessions, session duration, pages per session, returning vs. new visitors (GA4 cookie-based), deck selection patterns, game mode starts, scroll depth on the deck picker screen.

What we do not get: which specific person came back, what their play history looks like, or any channel to reach them again.

Which decks people actually play

We have 23+ themed decks. Confessions, dares, hot takes, flirty questions, horror-themed cards, couple prompts, solo reflections. Some land. Some do not.

The pattern after a few months of data: decks with a clear social situation in the name (Date Night, Pre-Game, After Dark, Flirt Mode) get picked at higher rates than abstract or clever-sounding names. "Truth Bombs" and "Hot Takes Only" sit in the middle. A deck called something generic without signaling who it is for or when to play it gets scrolled past.

The biggest surprise was solo play. We built solo mode late, expecting groups to dominate usage. Solo sessions turned out to be a steady, consistent share of total plays. People use the daily challenge feature alone, often during commute hours or late evenings. That showed up clearly in GA4 time-of-day breakdowns.

Decks that get started but abandoned mid-session taught us something else. Early versions of some decks had uneven card quality. Ten solid cards followed by five filler cards meant groups would hit a dead stretch and switch to another deck or close the tab entirely. We went back and cut every deck down, removing cards that did not carry their weight. After that pruning pass, average session duration on affected decks climbed and the mid-session drop pattern flattened out.

Session length by group context

GA4 does not tell us group size, but time-of-day and session duration patterns give workable hints.

Weekend evening sessions (Friday 8 PM through Saturday 2 AM) run longest. People cycle through multiple decks, switch game modes, and sessions stretch well past the weekday average. These are groups.

Weekday daytime sessions are short and focused. Mostly the daily challenge: one deck, a handful of cards, done in a few minutes. Solo players.

Couple sessions (inferred from Date Night and Flirt Mode selection during evening hours) fall between the two. They last longer than solo but shorter than group play, and couples tend to stick with one deck instead of browsing through several.

Return visits without retention tools

This was the part we were most uncertain about before launch. No push notifications. No email reminders. No account to log back into. No streak badges in a profile. Why would anyone come back?

They do come back. GA4 returning visitor percentage stabilized at a level that surprised us, given we have literally zero reengagement mechanisms. The daily challenge feature seems to be the main driver: one new card each day, and a portion of players made it part of their routine.

We also saw clear spikes tied to social calendar events. New Year's Eve, Valentine's Day, summer weekends, Halloween. People bookmark the game and pull it out when the situation fits. The no-account setup actually helps here: nobody needs to remember a password, redownload an app, or re-accept terms. Open the link, playing in three seconds.

One fail worth mentioning: we tried adding a streak counter for daily challenges. "Day 4!" with a little flame icon. It moved nothing. People who came back daily were already in the habit; the counter was decoration. We pulled it after a few weeks because it added visual clutter to the card screen without earning its place. Root cause, looking back: streak counters work when they create a fear-of-loss hook, but our daily challenge resets naturally, and people who skip a day do not lose anything. The mechanic had no teeth, so it had no effect.

What breaks without accounts

Some product directions are simply off the table. Saved favorites, personal play history, deck recommendations based on past sessions, any form of "pick up where you left off." Every session starts fresh.

Retention analysis in the traditional sense does not work either. "What share of day-1 players return on day 7?" needs individual identity. GA4 cookies approximate it, but cookie clearing, browser switching, and incognito mode all inflate churn numbers. The real return rate is higher than what we measure, but we cannot prove by how much.

And we cannot communicate with players at all. When we ship a new deck, the only distribution is organic search, social posts, and hoping people notice the addition when they come back on their own.

The tradeoff we keep choosing

Every couple of months we revisit whether to add optional accounts. Each time we weigh what we would gain (cohort data, push notifications, saved progress, a mailing list) against what we would lose (instant access, zero friction on first play, a simple privacy story). Each time we decide the tradeoff is not worth it. Yet.

The product works because of speed to first card. Someone opens a link and is reading a dare or a confession within seconds. That moment is fragile. A signup modal, even a dismissible one, changes the energy. For a game that depends on social momentum (everyone at the table waiting, someone on a date reaching for their phone), three seconds to play beats three seconds to play plus five seconds to close a modal.

Party Challenges is a free 18+ browser party card game with 1,000+ cards across 23+ decks for friends, couples and solo play. Try it at partychallenges.com.

If you are running a product where instant access matters more than knowing who your users are individually, the no-account path is more viable than it sounds. You lose the analytics comfort blanket. You gain the thing that actually makes people use the product: they can start without thinking about it.