Postcurve turns the numbers X already shows you into analytics you can act on. Every post is compared with your own posts at the same age, so you know within hours whether it’s taking off. It all stays in your browser.
How it works
X shows each post’s totals so far. Set a two-hour-old post beside last week’s and even a great start looks ordinary. Postcurve records your posts’ numbers whenever X shows them to you, and compares each post with your own posts at the same age.
Impressions by post age · example
Three hours in, this post has 1,400 impressions; your typical post had 350 at that age. Only real observations are plotted: lines just connect them.
A post with 600 impressions, 2 hours after posting · example
From 5 minutes to 7 days, at the observation nearest each age
Similar posts first (same format), then all your original posts. Each comparison says how many posts it used and how close their ages were.
What you’ll see
Not another wall of totals. Postcurve picks out what changed, what stands out and what has tended to work, and shows how many posts each answer rests on.
Open any post to see how it ranks among your posts at the same age, how fast it started, and which of your patterns it fits.
Your posts grouped by hook, format, length, media, links, call to action and topics you define, each against your typical post at the same age.
A day-by-time map of how your posts did against your typical post. Every cell says how many posts it’s based on, so a lucky hour can’t pass for a pattern.
Live breakouts, patterns, rising and fading trends and unusual posts, ordered by how reliable, large and recent they are. Save what helps and dismiss what doesn’t.
Also in the free version
No caps on posts or history. Every feature on this page is free.
Weekly, monthly and yearly reports, and cards for your wins. Cards are drawn in your browser; nothing is posted unless you press Post on X.
Every post with filters and ready-made views, like the most notable tenth.
Follower history from your profile visits, lined up with what you posted. Timing, never cause.
Your gap, recent pace and a projection that’s always labeled as one.
Find posts on a subject and see how they did together.
Fill in the past from your X archive or an X analytics export, read on your computer.
Optional: a post taking off, follower milestones, your weekly report.
Everything as CSV or JSON, whenever you like.
Built on evidence
Analytics are only useful if you can trust them. These rules hold everywhere in Postcurve.
How many posts, compared with what, over which dates, and how reliable that makes it.
No opaque 0–100 ratings. You see multiples of your typical post, ranks and counts you can check.
Questions have historically gone with more replies on your account.
It says what has gone together on your account. It never claims a post won you followers.
Moments X didn’t show you are left out, not filled in. A rounded “1.2K” is kept as unknown, never guessed.
Private by design
No account to create, nothing to sign in to, no server to send anything to. The free version has none.
Sent to us: nothing. Not your posts, not your numbers, not your X login.
Get started
From the Chrome Web Store. It’s coming soon.
Click the toolbar button while you’re signed in to X, and enable analytics for your handle.
Your history builds as you browse. Visit your profile now and then to keep it fresh.
Questions
Anything else? Email admin@oddlyserious.company.
Yes. Every feature on this page is in the free version, with no limit on posts or history.
Never. It doesn’t click, scroll or post on X. When you share a card, X’s own composer opens and nothing is posted until you press Post yourself.
No. It reads the numbers X already shows you on x.com while you’re signed in. It never asks for your password and doesn’t use X’s paid API.
In your browser’s own storage on this computer. Nothing is uploaded. You can export it as CSV or JSON, or delete everything from Settings.
No. Postcurve records your posts’ numbers whenever X shows them to you: your profile, your posts, your timeline. The more often you look, the finer the picture. Moments it didn’t see are left out, never filled in.
No. It works only for your own account, after you turn it on for it. Other people’s posts aren’t stored.
Yes. Import your X data archive to fill in your post history (archives don’t include view counts), or an export from X’s analytics page to add the numbers X reported. Both are read on your computer.
Google Chrome 111 or later on a computer. It’s coming soon to the Chrome Web Store.
No. Postcurve is independent and isn’t affiliated with or endorsed by X Corp.
Postcurve is coming soon to the Chrome Web Store. Follow @OddlyBuilding on X to hear when it’s out.
Coming soon to Chrome