Built for the Weld Shop

Weld Positioner RPM

Instant RPM Measurement for Welding Positioners

Place your iPhone on the turntable and tap START — instant RPM measurement. Set consistent speeds across different positioners and gear ratios. Save, export, and share welding conditions across your team.

What It Does

Key Features

Instant RPM Measurement

Place your iPhone on the turntable and tap START. The app automatically detects rotation and displays RPM — no setup required.

Save Up to 50 Records

Automatically capture measured RPM and save detailed welding conditions. Instantly recall and reproduce the same settings on any positioner.

Detailed Conditions

Record pipe size, weld type, material, filler wire, current value, and notes. Sort history by date or pipe size for quick retrieval.

CSV Export & Import

Export and import welding conditions as CSV with one tap. Share data across your team and transfer settings to a new iPhone with ease.

Any Positioner, Same Speed

Works across different manufacturers, machine sizes, and gear ratios. Reproduce the exact same rotation speed every time, on any machine.

Privacy First

All measurement data is stored only on your device. No data is sent to external servers. No advertising or analytics.

In Action

See It Work

Measuring & Recording

Complete & History

Edit & Save Record

History List

Technical

Specs

Precision measurement built for the weld shop.

RPM Display Precision

1 rpm or more: 2 decimal places (e.g. 5.66 rpm)
0.01 to less than 1 rpm: 3 decimal places (e.g. 0.551 rpm)

Pipe Size Range

3/8" (10A/DN10) to 24" (600A/DN600)

Records

Up to 50 welding condition records
Sort by date or pipe size
CSV export & import

Selectable Fields

Weld type: Fillet / Butt / Other
Material: Carbon / SUS / Al / Ti / Other
Filler wire: TIG / Solid / Flux / Metal / Other
Current value & notes

Please Note

The table does not need to be perfectly level, but level is recommended. Place the iPhone anywhere on the table away from the center. Measurement results are invalid if the iPhone is placed while the table is already rotating.

Measurement results may be affected by iPhone model, iOS version, table levelness, and placement position. Please use results as a reference only.

As we continually improve this app, if there is any discrepancy between this description and the actual behavior, the app's behavior takes precedence.

Installing the app gives you 15 free trial measurements. A subscription unlocks unlimited measurements and all features.

FAQ

Frequently Asked Questions

Which iPhone models are supported?

iOS 16.2 or later is required. iPhone 12 or later is recommended for MagSafe mounting.

"Detecting variation" keeps appearing and the reading won't stabilize.

At higher rotation speeds, minor speed fluctuations may be detected, causing "Detecting variation" to appear. You can improve this by increasing the "Stability Threshold" value in Settings. Menu (top right button) → Settings → Stability Threshold. The default value is 0.15. Try increasing it gradually, such as 0.25 or 0.50. For low-speed rotation, the default value works well.

How do I cancel my subscription?

Go to iPhone Settings → Apple ID → Subscriptions to cancel. Please cancel at least 24 hours before the next renewal date. You can also manage your subscription from "Subscription Management" in the app menu.

Will my data be lost after an update?

No, updating the app will not delete your data. However, uninstalling the app will delete all data. We recommend regularly backing up important data as a CSV file.

Can I back up my data?

Yes. You can export your history as a CSV file from the history screen. You can also import the CSV file to another iPhone, making it easy to share welding conditions.