# Conduit Kit: Bend, Fill, Box — Marks, cut length and box size

> Marks, cut length and box size (iPhone/iPad app by RAINBOW TREE LLC.)

- Source: https://appshunter.io/ios/app/conduit-kit-bend-fill-box/id6804251756 (this page in markdown: same URL + `.md`)
- Developer: [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Japanese
- Released: 2026-08-28
- Data updated: 2026-08-30
- User reviews in markdown: https://appshunter.io/ios/app/conduit-kit-bend-fill-box/id6804251756/reviews.md

## What is Conduit Kit?

Know the length of the piece before you cut it.

Pick the conduit and the kind of bend, type the dimensions — you get the marks measured from the end of the pipe and the cut length. Lay a tape on it and mark.

■ If it cannot be made, you hear it first
The app finds the dimensions where the arcs would overlap (at 45°, an offset smaller than 2.688 in) before you bend, and switches you to an angle that works in one tap.

■ Kinds of bend
90° stub, custom angle, offset, 3-point saddle, 4-point saddle and parallel runs. Marks can be measured to the start of the bend, the center of the arc, or the theoretical corner.

■ Bend radius against the code
Inside radius is shown with its source (NEC Chapter 9, Table 2 / Articles 342.24, 344.24, 358.24). The app does not reproduce tables — it cites them.

■ Not limited to a lookup table
Fill is computed from the conduit ID and the conductor OD, so any size works, listed or not. NEC Chapter 9, Table 1.

■ Match the app to your bender
Bend one 90° and measure the stub-up. That gives the real centerline radius of your tool, and every cut length after that matches what you actually make.

■ Keep it per job, hand it over on paper
Add bends and sizing to a job and the take-off sheet builds itself. Sticks are counted by packing the longest pieces first, so the count is never short the way total ÷ stick length would be. Export it as a PDF.

■ Works with no connection
Everything is computed on the device. Job records stay on this device only — they are not stored in iCloud, so they cannot move to a new phone.

■ About pricing
The 90° stub (cut length and the radius check) and conduit size selection are free, always. Offsets, saddles, custom angles, parallel runs, pull box sizing, bender calibration, job records and the take-off PDF are a one-time purchase. There is no subscription.

■ Units and standards
Switch between inch (NEC, North America) and mm (JIS, Japan). Conductor sizing is not offered in North America, because ampacity is given as a table (NEC Table 310.16) and showing only the voltage-drop half would give an answer that is too small.

What the app shows is a guide for installation. Compliance and the final call belong to the job's own standards and a licensed electrician.

Terms of Use: https://rainbowtree.work/app/terms
Privacy Policy: https://rainbowtree.work/privacy/densenkan-keisan.html

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Conduit Kit Pro | $9.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-28

No release notes.

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All apps by RAINBOW TREE LLC: https://appshunter.io/developer/1619997282

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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 2026-08-30.*