Nutrition App Affiliate Cookie Windows Compared (September 2026)

A cookie window is how long an affiliate program credits a sale to a click you made. Cronometer gives you a 365-day window; YAZIO gives you 30 days. MacroFactor, MyNetDiary and Nutrola do not use cookies at all: they record a referral when a follower signs up inside the app using your code. The difference matters because a browser cookie and an app install are two separate pieces of software, so a cookie set on a click does not automatically follow the user into the app.

What does a cookie window do?

A cookie is a time tag. When a visitor clicks your link, the program plants a cookie that says "this person came from creator X". If that visitor buys within the cookie window, you get credit. After the window expires, the cookie is gone and you do not get credit for that customer. Cronometer's is 365 days; YAZIO's is 30 days.

Program	Cookie window	Referral method
Cronometer	365 days	Affiliate link tracking
YAZIO	30 days	Affiliate link tracking
MacroFactor	None	Code at sign-up
MyNetDiary	None	Code at sign-up
Nutrola	None	Code at sign-up
Noom	Not stated	Not stated
Cal AI	Not stated	Not stated

Cookies work well for websites: visitor clicks, browses, buys, all in the browser. The problem for app referrals is that the journey splits across two apps, and cookies live in the browser.

Why do cookies fail for app installs?

App referrals are a two-step journey split across platforms. Follower sees your code on Instagram. Clicks through to App Store or Google Play. Installs the app. Opens the app. Starts onboarding. Signs up. The cookie from the web link sits in the browser. The sign-up happens inside the native app, where browser cookies do not exist. Days or weeks may pass between the click and the sign-up.

Cronometer's 365-day window gives a lot of room, but if a user installs the app on day 100, then waits a month to open it and sign up on day 131, whether Cronometer's system can still connect that sign-up back to your original click is not stated in the listing.

How does code-at-signup avoid cookie problems?

MacroFactor, MyNetDiary and Nutrola sidestep cookies. When a new user opens the app and reaches the sign-up screen, there is a code field. The user types your code. The app records the referral right then, inside the app, without ever checking a browser cookie. There is no time window and no platform gap. A follower can see a post from two months ago, pull up the app, enter your code, and the referral counts.

This method works because the referral is recorded at the moment of action (sign-up in the app), not at the moment of a click on a web page. The programs do not rely on a cookie to connect the two events. How to read the rest of an affiliate network listing covers the other terms, like minimum payouts and in-app exclusions, that sit alongside a cookie window.

What should you ask before you apply?

When you are evaluating a nutrition app program, ask how referrals are tracked. If the program uses an affiliate link and a cookie, ask what the cookie window is and whether it covers app sign-ups or only web sales. If it uses a code, ask whether the code works from any platform or only your own account, and whether there is a time limit. The tracking method shapes how many of your followers will be credited.

Among the programs in this guide as of September 2026, a code entered at sign-up does not depend on a cookie surviving the gap between a click and an app install, since the referral is recorded inside the app itself. See which programs use codes and which use links.

How does the journey break between browser and app?

Here is how a typical app referral unfolds: a follower sees a nutrition app reel on TikTok. They click the link. It opens their device's app store: Apple App Store or Google Play. They install the app (this can take minutes or hours or days; they might even close the browser tab at this point). Later, they open the newly installed app. The app shows an onboarding screen. They create an account and enter a code. This is the moment the referral needs to be recorded. But if the program is tracking a browser cookie from the original click, that cookie is long gone. The browser that received the original click is not running anymore. The app store app does not carry the browser cookie. The newly opened native app does not have access to the browser's cookies.

Cronometer's 365-day cookie helps if the entire process happens in one browser session: click link, stay in browser, sign up on the website. But for app sign-ups, the journey splits across two or three different apps, and the browser cookie cannot bridge that gap. MacroFactor, MyNetDiary and Nutrola solve this by moving the tracking from the browser to the app itself, where the sign-up actually happens.

When do cookies work and when do they fail?

Cookies work well for web referrals where the entire journey stays in the browser: visit a website via an affiliate link, browse, add to cart, checkout, purchase, all in the browser, and the cookie set on the click is still there to get credited. Cookies are a weaker fit for app referrals, where the first action, clicking the link, happens in the browser, but the conversion action, signing up in the app, happens in a separate piece of software with no access to that browser's cookies.

A code entered at sign-up does not depend on a click surviving long enough to connect to a sign-up. The code is simply typed into the app at that moment, and the app records who sent it, which is how MacroFactor, MyNetDiary and Nutrola each avoid the cookie problem described above.