Most trackers answer that question with whatever the photo happened to look like. Topline measures three angles the same way every month, knows how much its own score wobbles, and says “stable” when the difference is smaller than that.
Up 8 points since Aug 26, over 31 days. That is outside the measurement band, so it counts as a real move.
Under a minute, once a month. Most of the work is spent making sure the photograph is not what changed.
Two scans of the same head, three hours apart, in different light, can differ by several points. Every hairline app on your phone would show you that difference as progress.
Topline measures its own wobble and refuses to print anything smaller. Inside the band the chip says stable, not “+3”. A second scan the same week replaces the first instead of adding a point to your trend. The written analysis stays quiet until a month has passed, because that is how fast hair moves.
You lose a few green arrows. You gain a number that means something when it finally moves.
+3 over 34 days. Inside the band, so it reads as unchanged, not as a gain.
Two scans the same day. The second replaces the first; you choose which one the trend keeps.
Outside the band and 31 days apart. This one is real, and it is the only one wearing colour.
Bathroom light at 8am and 11pm tell you two different stories about the same head. Topline gates the light instead of averaging the panic.
Scans are analyzed in flight and never written to our storage. There is no photo column in our database and no image bucket. No email, no password.
Started something six months ago? The trend answers in points, and only when the difference is bigger than the instrument. That is the whole reason to keep the receipts.
This wall fills with real TestFlight feedback. No fabricated reviews, ever. That's the whole brand.
Not ratings, not downloads. What the code does.
One scan every 30 days, free, no card. Pro reveals the score, the stage and the trend.
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