Likes and reach do not pay invoices. Castlytics shows you which creators drive real purchases — with promo codes, link-in-bio tracking, and story attribution.
Stop paying for engagement. Start paying for conversions.
Instagram is one of the most popular influencer channels — and one of the hardest to measure accurately.
Instagram allows only one clickable link — the bio. Captions cannot have working URLs. This forces all link-driven traffic through a single bottleneck that creators may not update between campaigns.
Instagram Stories disappear after 24 hours. The link sticker is gone with them. Any followers who saw the story but visited later have no trackable link to follow — unless you have a promo code.
A creator with 100,000 followers and 8% engagement may drive zero purchases. Instagram analytics shows reach and impressions — not orders. Without attribution data, you are guessing.
Three independent signals work together to catch every follower who converts — whether they clicked, typed, or saved the post for later.
castlytics.app/r/abc123 placed in the creator's bio
Give each creator a unique tracking link for their bio. When followers tap the bio link and arrive on your site, the visit is attributed to that creator's campaign instantly. If the creator uses a linktree or similar tool, the tracking link goes into that too.
Best for: feed posts, reels, and carousels that direct followers to the bio link
Follower uses EMMA20 at checkout — matched to the campaign
The promo code is the most reliable signal for Instagram. Include it in the caption, the story overlay text, and the verbal CTA in reels. When a follower uses it at checkout — even days after seeing the content — the conversion is attributed to the right creator.
Best for: all Instagram placements, especially stories that expire before conversion
Follower converts 3 days later — still attributed correctly
Instagram followers often save content and come back to it later. Castlytics maintains a configurable attribution window so followers who saw a post on Monday and purchased on Thursday are still tied back to that creator campaign.
Best for: higher-priced products, first-time buyers who need more consideration time
The creators with the most likes are rarely the creators who drive the most revenue. Here is why — and why promo codes are essential for Instagram.
A lifestyle creator with 500K followers and 7% engagement may have an audience that follows for inspiration but is not ready to buy. High save rates and comments do not mean high purchase intent.
Promo codes are the only signal that works regardless of how a follower converted — even if they saw a story that expired, visited days later, or found the product through a screenshot. They are not optional for Instagram; they are the primary attribution method.
Get a tracking link and promo code ready for each creator in under 3 minutes.
Paste one script tag into your site's <head>. It captures the tracking link visit and holds the attribution until the follower converts.
<script src="https://castlytics.app/tracker.js" data-key="YOUR_KEY" async></script>Enter the creator's name, set a unique promo code, and get the tracking link for their bio. Set your attribution window (7 days recommended for feed posts, 14 days for reels).
Give the creator: the tracking link for their bio, the promo code for their caption and story CTA. Remind them to update their bio link before the post goes live — and to include the promo code in every piece of content for that campaign.
Instagram limits clickable links to one — the bio. Captions have no clickable URLs, stories expire after 24 hours, and the platform passes no referrer data. Standard analytics shows Instagram-driven purchases as direct traffic with no attribution.
Each creator gets a unique promo code. When a follower uses it at checkout — even days after seeing the post — Castlytics matches it to that creator's campaign. This is the most reliable method for Instagram because it does not depend on a link click.
Yes. Use your Castlytics tracking link as the story link sticker destination. Taps are attributed to the campaign immediately. Stories expire, so always pair the story link with a promo code for followers who convert after the story is gone.
Engagement measures content performance, not purchase intent. A creator with 10% engagement in a lifestyle niche may have followers who like posts but rarely buy. A creator with 3% engagement but a loyal, product-curious audience can drive far higher ROAS.
Feed posts peak in the first 24–48 hours, reels can surface for 7–14 days. We recommend a 7-day window for standard posts and 14 days for reels. Use 30 days for high-consideration products where followers bookmark the content and return later.
Free plan includes 3 campaigns, unlimited clicks, and 30-day attribution. No credit card required.
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