A measuring instrument for internet photos
Banana for scale.
Now with a scale.
Put your subject next to something everyone already knows the size of — a lighter, a can, a €1 coin. Pick that reference from the catalogue, hold the phone straight, and the frame has a scale everyone can read.
No account needed to browse or post · 18+
How it works
Three steps, and one of them is just taking a photo
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Step 01
Get both in frame
Your subject and one object from the catalogue, in the same shot, from the in-app camera. Hold it straight and the shot earns its Level and Tilt badges.
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Step 02
The reference sets the scale
A lighter is 78mm. That is not a guess, so once it is in the frame, nothing else in the frame is a guess either.
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Step 03
The feed argues about it
Tag what you shot, post it, and it lands in the grid. Likes, shares, and comparisons against other people's posts.
Posting
Point, level, shoot
This is the real capture view. Turn the camera on, right here, and watch the badges light up as you straighten the phone. Nothing leaves your browser until you post from the app.
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Level guide
Red, amber, green. A tilted phone skews the size ratio, so the frame tells you when it's straight.
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Level and Tilt badges
Level means no side-to-side roll, and Tilt means no forward or back lean. Each is checked at the moment you shoot and stays on the post, so people can see the comparison is a fair one.
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Reference
Pick the object in the shot from the catalogue. Its known size is the scale.
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Item
Tag what you shot, in your own words. That tag is how the feed finds it.
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Post or Save
Add a title if you like. Post it to the feed, or Save it privately to your gallery.
The feed
One grid, sliced three ways
What is being measured and what it is measured against are different questions. Most feeds collapse them into one tag. This one does not — every post carries both, so you can pull the grid apart on either.
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Sort by
Trending, newest, or top. The order, and nothing else.
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Item
The subject, as a tag anyone can type. Show me every hailstone anyone has ever posted.
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Against
The reference. Show me everything anyone has measured in AA batteries.
Compare
Two posts, one frame
Found something to settle? Tap Compare on any post, pick a second one, and arrange the pair yourself — side by side or overlaid. Two badged shots make the fairest fight.
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Arrange it
Move, resize, rotate, flip, crop and tilt-correct each photo on its own.
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Line it up
Overlay at half opacity, boost contrast, or cut a hard split between the two.
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Browse them
The Compare tab collects every comparison, plus the ones your posts are in.
And the rest
The parts that make it an app
Search by tag
Suggestions as you type, your recent searches, popular tags, and the posts you viewed last.
A profile that's yours
Avatar, name, bio and links, with your posts, comparisons and likes counted. Guests can post first and sign up later.
Likes and shares
Like what you'd argue for. Share any post or profile with a proper preview card.
Safe by default
Adult posts stay blurred until you switch the app to NSFW. Every upload is screened before it's stored.
Reported, reviewed
Report a post or a profile. Moderators see it and act on it.
Install it
Add CompareIt to your home screen and it opens like any other app. Light, dark, or match your system.
The catalogue
The reference is the instrument
You do not type in a size. You pick an object whose size is known, and that is the scale. Objects, not hashtags — a lighter is 78mm whoever is holding it.
- Lighter 78mm
- Monster Can (500ml) 168mm
- Monster Can (473ml) 157mm
- Ruler 300mm
- Redbull Can 134mm
- €1 Coin 23.25mm
- €2 Coin 25.75mm
- Dollar Bill 156mm
- AA Battery 50.5mm
- AAA Battery 44.5mm
- and counting
The rules
How the number stays honest
A measurement is only worth having if the photo behind it is. Four rules the pipeline does not bend on.
Shot in the app, or not at all
Posts come from the in-app camera. There is no upload-from-gallery button, so every photo was taken for the comparison it's in.
Straight shots get a badge
The phone's own sensors check roll and pitch at the moment you shoot. Level and Tilt are earned, never typed in, and you can't add them afterwards.
Checked before it's stored
Each upload carries a capture marker and goes through image screening. If either check fails, nothing is written.
Originals stay original
The photo your phone produces is stored as-is. The grid shows smaller copies, and measurements never run on those.
On the bench
Pixel-counting. Measuring straight off the original photo, so every post gets its number.
On the bench
Leaderboards. Biggest of the week, per object, and a crown for the winner.
On the bench
Comments. A thread under every post, for the arguments a like can't settle.
Something in your house is bigger than you think
Go and find out by how much. Browse the feed or post your own, no account needed.