Web app · Utilities
TongueCheck
Type in your CAT scale slip and get the nine numbers it never prints
Enter your door-jamb ratings once, log each weigh pass, and TongueCheck derives tongue or pin weight, tongue percent, trailer weight, gross combined, payload remaining and how much front axle your WDH restored — with red/yellow/green margin cards. Free, offline, no account.
Stored in your browser only. Nothing you do in the web version is sent to our servers. Clear your browser data and it's gone — so export a backup from the in-app menu if you want to keep it.
In your browser
What you can do in TongueCheck on the web
Rig garage
Store each combo's GVWR, GCWR, front and rear GAWR, payload placard and both receiver tongue ratings, plus the trailer's GVWR, axle rating and type — entered once from the stickers.
Slip decoder
Log the steer, drive and trailer axle weights from each pass (truck only, hitched bars off, hitched bars on) and get tongue or pin weight, tongue percent, trailer weight, GCW, truck GVW and payload remaining instantly.
Margin cards
Every stored rating becomes a red, yellow or green bar showing pounds of headroom, with where to find that rating on the vehicle and what it actually governs.
WDH comparison
Bars-off versus bars-on for the steer, drive and trailer axles, plus the front-axle load restoration percent and a verdict against the 50–100% band.
Cargo ledger
Track each item of gear by weight and where it rides — cab, bed or trailer — and watch estimated payload remaining move before you ever pay for a weigh.
History and weigh report
Tongue percent charted weigh by weigh, gross combined weight over the season, and any visit exported as a plain-text one-page report or the whole log as CSV.
Screens
Every screen, rebuilt for the browser
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1
Rig garage
Latest decoded coupler weight, every rig with its verdict, and the most recent scale visits.
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2
Rig
One combo: latest weigh, tools, all the stickered ratings, and every scale visit.
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3
Rig ratings
Enter the tow vehicle and trailer ratings straight off the door jamb and certification label.
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4
Weigh session
One scale visit: the decoded figure, the raw slip, every pass, and the passes still missing.
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5
Decoded slip
Tongue or pin weight big, then percent, trailer weight, GCW, truck GVW, payload left and front-axle restoration.
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6
Margin cards
Every rating versus what the scale said, as red, yellow and green headroom bars.
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7
WDH comparison
Front axle load restored, axle-by-axle bars off versus bars on, and how to read it.
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8
Cargo ledger
Estimated payload remaining and every item of gear you can toggle on or off.
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9
Weigh history
Tongue percent per weigh, gross combined over time, and every visit grouped by rig.
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10
Weigh report
A one-page text report — ratings, passes, derived figures and margins — to download or copy.
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11
Settings
Yellow-band width, raw slip display, default trailer type, CSV and JSON export, erase.
Try it with sample data: Loads two rigs — an F-150 with a Rockwood travel trailer and a Tundra with a Reflection fifth wheel — five scale visits over about four months (including a dead-weight tow and an over-payload fifth-wheel weigh) and a five-item cargo ledger. You can start fresh at any time.
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Questions
Is the web version of TongueCheck free?+
Yes. Sign in with a free All Things AI account and use every screen — no subscription, no in-app purchases.
Where is my data stored?+
Only in this browser's local storage. Nothing you enter is sent to our servers, so we can't see it, back it up, or restore it. Clearing site data, a private window, or another device starts empty. Export a backup from the in-app menu to keep it.
Do I need an account?+
You can read about the app without one, but you must sign in to open it. Sign-in is free and takes a few seconds with Google.
How is the web version different from the TongueCheck iPhone app?+
The iPhone app renders the weigh report as a shareable PDF; the web version downloads the same content as a formatted plain-text page you can print. There is no scale locator and no way to pay for the weigh here — buy the weigh at the CAT scale, then type the three numbers in. Everything is stored in this browser only; clearing site data or switching browsers loses your rigs and weighs unless you exported the JSON backup first. Ratings are whatever you type in — TongueCheck cannot read your door-jamb sticker, so check the numbers against the vehicle.