# TandemIQ: Axle Weight Calc — Tandem slide & scale weights

> Tandem slide & scale weights (iPhone/iPad app by Donald Proctor.)

- Source: https://appshunter.io/ios/app/tandemiq-axle-weight-calc/id6790554300 (this page in markdown: same URL + `.md`)
- Developer: [Donald Proctor](https://appshunter.io/developer/1861592032)
- Category: Productivity, Navigation
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-08-26
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/tandemiq-axle-weight-calc/id6790554300/reviews.md

## What is TandemIQ?

You're on the scale, you're heavy on the drives, and there's a line behind you.

TandemIQ tells you which way to slide the tandems and exactly how many holes. In four seconds. With no signal.

$4.99 once. No ads — not now, not ever, including for people who paid.

FREE, ALWAYS
• Federal axle and gross legality check (12,000 steer / 34,000 tandem / 80,000 gross)
• Trailer tandem slide solve — which direction, how many holes, and what every axle will weigh after

FULL UNLOCK ($4.99, one time)
• Fifth-wheel slide
• Federal Bridge Formula check
• Saved trailer profiles (hole spacing and pounds-per-hole vary by trailer)
• Calibrate pounds-per-hole from a real scale ticket
• Scale ticket log with photos

THE DIRECTION IS UNMISTAKABLE
"Move tandems 3 holes FORWARD." In big letters, with an arrow. Sliding forward puts weight ON the trailer tandems and takes it OFF the drives — get that backwards and you make the problem worse. TandemIQ never does.

IT TELLS YOU WHEN SLIDING WON'T WORK
If you're over gross, no amount of sliding fixes it. Other apps return an absurd hole count. TandemIQ says "CANNOT BE LEGALIZED BY SLIDING" and tells you why.

WORKS WITH NO BARS
There is no network code in this app at all. Airplane mode, dead zone, middle of nowhere — it works exactly the same.

Always re-weigh after sliding. Estimates only — you are responsible for the legality of your load.


## Version history (last 1 release)

### 1.0 — 2026-08-26

No release notes.

## More apps by Donald Proctor

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- [LensWright: Optician Calc](https://appshunter.io/ios/app/lenswright-optician-calc/id6790553187)

All apps by Donald Proctor: https://appshunter.io/developer/1861592032

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*