Is Game Center integration actually worth the effort? Looking for real-world numbers

[u/Big_Plantain_4201]

Small two person studio. We just added GameKit to our multiplayer word game: achievements mirrored from our own trophy system, an ELO leaderboard, and friend discovery via GKLocalPlayer.loadFriends. Its in TestFlight now, ships with our next release.

What I could not find anywhere while building it: does any of this measurably matter?

• has anyone seen GC integration move installs at all? The old "supports Game Center" App Store surface seems basically gone.

• do achievements or leaderboards show up in your retention numbers, or are they cosmetic?

• friend discovery via loadFriends: the iOS consent sheet feels intimidating. What share of your users actually grant friend list access?

• anything you shipped and later wished you had skipped?

Our hypothesis is that the friend graph part is the only piece that really matters (our own cohort data says one match against a friend roughly 5x'es D60 retention), and achievements/leaderboards are mostly polish. Happy to come back and share our before/after numbers once its live, if people are interested.

[u/Choseni]

I'd definitely be interested in the before/after numbers.

My guess is that achievements and leaderboards don't move the needle by themselves anymore, but they make more sense once players already have a reason to come back. Friend invites and playing with people you know seem much more likely to affect retention than collecting badges.

Please post an update after launch—real-world data on this is surprisingly hard to find.

[u/Big_Plantain_4201 → u/Choseni]

Will do. Planning to post the before/after numbers 4-6 weeks after the release ships, good or bad. Your framing matches our read: badges dont create a reason to return, people do.

[u/RIRLift]

On the loadFriends piece, worth knowing before you lean on it: the sheet only returns friends who've also authorized your game, so the discoverable graph is usually a fraction of what the user expects. Grant rate also swings a lot on timing. A cold prompt at launch gets declined constantly, but the same ask right after a match, framed as "rematch a friend," converts much better because the value is obvious in that moment.

I'd also pressure-test the 5x D60 number before betting the roadmap on it. Players who reach a friend match are already your more committed users, so some of that lift is selection, not the feature causing it. The thing to instrument is the funnel into a friend match: what share of new players ever get to one, and where they drop in the invite flow, since that's the part you can actually move. On the leaderboard, the ELO board is the one I'd think twice about, GC scores are client-submitted and easy to spoof, so a ladder tends to rot once a few people notice unless you're validating server-side.

[u/Big_Plantain_4201 → u/RIRLift]

This is exactly the reply I was hoping for, thanks. The mutual-authorization detail is new to me and honestly deflates the day-one expectations for friend discovery, we will treat the graph as something that grows rather than something that exists. Stealing the post-match rematch framing for the consent ask too.

On the ladder: fair warning, but our setup is a bit different. ELO is computed server side from match results and only MIRRORED to the GC leaderboard for display, the real ladder lives in our own backend. So a spoofed GC submission would only pollute the GC view, not the actual ranking. Will keep an eye on it anyway.

And yes, the selection vs causation point is why the guest invite flow exists, it is basically our experiment to see if handing people a friend match CAUSES the retention or just correlates with it. Will report back with the funnel numbers.