# My LoopCal: 4-20mA Calibration — Loop Calculator & PDF Reports

> Loop Calculator & PDF Reports (iPhone/iPad app by Neobile LLC.)

- Source: https://appshunter.io/ios/app/my-loopcal-4-20ma-calibration/id6792422682 (this page in markdown: same URL + `.md`)
- Developer: [Neobile LLC](https://appshunter.io/developer/1080490647)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Indonesian, Italian, Japanese, Korean, Polish and 8 more
- Released: 2026-07-29
- Data updated: 2026-10-21

## What is My LoopCal?

LoopCal turns a 4–20 mA loop check into a calibration worksheet you can hand over, and it is the quickest way to convert a signal in the field. Built for instrumentation and calibration technicians. Fully offline.

FROM CHECK TO WORKSHEET
• Guided three-point, five-point, and custom 2–21-point checks
• As-found and as-left runs, with the error and pass/fail at every point
• Up-scale and down-scale readings with hysteresis
• Tolerance as percent of span, signal units, or engineering units
• Worst point and maximum error summarized for you
• A clean PDF worksheet with your company name and logo, in US Letter or A4, plus CSV for your records

CONVERT IN SECONDS
• 4–20 mA, 0–20 mA, 0–10 V, 1–5 V, and your own custom signal endpoints
• Direct-acting and reverse-acting ranges
• Linear and square-root (flow) transfer functions
• Engineering ranges with any unit, including negative and offset spans
• Percent, signal, and engineering values update as you type, with the substituted formula shown
• Verify this loop: take the range you just entered straight into a check

EVERY INSTRUMENT ON RECORD
• Save instruments with their ranges and calibration history
• See what is coming due, and get a reminder before the next calibration
• Reopen a saved instrument and start its next check without retyping the range

LOOP POWER MATH
• Shunt resistor voltage drop
• Required supply voltage and remaining compliance
• Maximum loop and wire resistance

PRIVATE BY DESIGN
• Everything runs on your device. No account, no ads, no tracking, no network.

LoopCal is a calculation aid and field worksheet — not a calibrator, an accredited calibration service, or a replacement for manufacturer procedures. Always follow site lockout/tagout, operations authorization, device manuals, and approved procedures.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual | $4.99 | per year |
| Monthly | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $6.99 | one-time |


## Is My LoopCal safe?

Not enough ratings yet to assess My LoopCal.

## Is My LoopCal legit?

My LoopCal: 4-20mA Calibration appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for My LoopCal is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.3.2 — 2026-10-20

Improved the experience and fixed a few bugs.

### 1.3.1 — 2026-10-15

Improved the experience and fixed a few bugs.

### 1.3 — 2026-10-06

• Verify this loop: go straight from the calculator into a three-point check — the range you entered comes with you.
• Your worksheet now appears right on the result screen after a check.
• A fuller example worksheet: five points, as-found and as-left.
• Cleaner worksheets: sections with nothing to show are no longer printed.
• “Start check” stays within reach at the bottom of the screen.
• Share LoopCal with a colleague from the More tab.
• More dependable when you work without a signal.

### 1.2 — 2026-09-24

Preview your field worksheet before exporting, and explore a clearly labeled example from the calculator. Summary actions are easier to find, and saving now keeps report identities and calibration dates consistent.

### 1.1 — 2026-09-03

Made some minor improvements

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- [SubsSnap: Subscription Tracker](https://appshunter.io/ios/app/subssnap-subscription-tracker/id6783955340)

All apps by Neobile LLC: https://appshunter.io/developer/1080490647

## Related topics

[my20twenty](https://appshunter.io/ios/topics/my20twenty) · [controller calibration](https://appshunter.io/ios/topics/controller-calibration)

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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 2026-10-21.*