Choose your platform, enter your real numbers, and get a weighted viral likelihood score based on how Instagram and TikTok's algorithms actually behave.
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Instagram · Reels
Awaiting your data
Enter your numbers below
Fill in the form and tap Calculate — your personalised score will appear here.
Engagement
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weight · 40%
Completion
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weight · 35%
Format
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weight · 25%
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Platform
Your post numbers
Enter the real stats from your post analytics
Raw metrics
Views / Plays · total reach
Likes · total count
Comments · discussion signal
Shares / Sends · distribution
Saves · highest-intent signal
Story replies · DM engagement
Stitches / Duets · creator engagement
Profile visits · discovery signal
Your followers · account size
Video completion
Find these in your platform's native analytics
weight · 35%
Watch-through rate
% of viewers who watch to the end
40%
0%100%
Rewatch / loop rate
% who play the video more than once
8%
0%50%
Format & content signals
Tick everything that applies to this post
weight · 25%
Strong hook in first 3 seconds
Visual + verbal pattern interrupt right at the open
Readable without sound
On-screen text makes sense with audio off
Trending audio used
Audio is currently in the platform's top sounds
Re-hook at the 30-second mark
New angle, bold statement, or payoff tease mid-video
Save-worthy final frame
Last screen gives a clear reason to save the Reel
Carousel or multi-image format
Swipeable posts get 3× the average Reel reach on Instagram
Caption CTA drives engagement
e.g. "Save this for later" or "Tag someone who needs this"
Comment-bait moment
Content naturally sparks debate, a reply, or a "this is me"
Riding an active TikTok trend
Format, sound, or theme matches a currently growing trend
Clear For You page hook
Optimised for a cold audience who doesn't follow you yet