Use case: referral programs

Your user invites a friend. Ferry proves the friend showed up.

A referral program pays real money for a real install. Ferry gives each user a personal link, keeps track of it through the app store, and matches the friend's first app open back to that exact click. The reward only goes out when the match is one you can trust.

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01 SHARE Each user gets their own invite link, tied to their ID

02 INSTALL The friend taps it, visits the app store, and installs

03 MATCH + REWARD Ferry matches the first open and scores its confidence

WHAT A REFERRAL PROGRAM ACTUALLY NEEDS

A friend's install is easy to lose track of.

Between a share and an install, your user leaves the app for the store and comes back a different person, on a different screen, with no link in sight. Ferry is built to carry the referral through that gap.

What you need	How Ferry handles it
A link for every user, not just every campaign	Create a personal invite link per user through the API, carrying that user's ID as structured link data.
The referral has to survive a trip to the app store	Deferred matching keeps the referrer's ID through the store visit and hands it back on the friend's first app open.
Proof it's the right friend, not a guess	Ferry prefers hard evidence, like the Play Install Referrer or an App Clip token, over a device-fingerprint guess.
A number you can gate a payout on	Every match returns a confidence score. Deterministic matches score 1.0. Fingerprint matches score lower.
No reward for an ambiguous match	When Ferry isn't confident, it returns no match at all, instead of guessing and rewarding the wrong person.

THE PART WHERE MONEY MOVES

Only pay out when you're sure.

Every match Ferry returns comes with a confidence score, not just a yes or no. Use that score to decide when a reward is safe to send automatically, and when it should wait for a human to look at it.

Match result	What it means	What to do
Deterministic match (score 1.0)	Ferry has real proof: an install referrer, a token, or a code the friend entered.	Safe to reward both users automatically.
Probabilistic match (score below 1.0)	Ferry's best guess, based on device and timing signals, not hard proof.	Route to manual review, or hold the reward instead of paying it out automatically.
No match	Ferry could not connect the install to any click with enough confidence.	Treat the install as organic. Don't pay a reward.

REWARD THE REFERRAL, NOT THE GUESS

Give every share a link Ferry can follow.

Start with one invite flow and see the confidence score on every match it produces.

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