Offline • No account • No tracking Metrology helpers for daily shop work

Turn dial readings into usable results — instantly.

Dial Indicator Helper helps you practice and use dial-indicator workflows on iPhone: dial, bore gauge, and test indicator modes; imperial/metric switching; fast “Set Zero”; recorded readings; and computed stats like range, circular runout, and straightness.

View on the App Store See how it works Support

Illustration of a dial indicator workflow on iPhone

Built-in modes & calculations

Designed around what you do at the surface plate, the lathe, and the mill.

Dial mode

Zero quickly, step readings up/down, and record deltas from the current zero position.

Bore gauge mode

Use a master ring size reference, record readings, and compute values like circular runout and min inscribed diameter.

Test indicator mode

Supports angle-based cosine error correction to get a more accurate true value from the indicator reading.

Stats that matter

Range, average, straightness (least-squares), and circular runout computed from recorded readings.

Imperial & metric

Toggle units while preserving your existing readings by converting values appropriately.

Offline by design

No login, no ads, no tracking SDKs. You keep control of your data and workflow.

Quick tutorial

Example workflow to capture readings and get usable inspection numbers.

Screenshot: Dial mode — add assets/dial-screenshot-dial.png

Choose a mode Dial / Bore / Test — each one matches a real measurement workflow.

Set units & zero Toggle Imperial/Metric and tap “Set Zero” to align the digital readout with your baseline.

Record readings Save a series of readings as you rotate the part or scan along a surface.

Read the stats Range/runout/straightness are computed from your recorded data so you can make a decision quickly.

Screenshot: Bore gauge — add assets/dial-screenshot-bore.png

Screenshot: Test indicator — add assets/dial-screenshot-test.png

Screenshot: Stats — add assets/dial-screenshot-stats.png

Range / Runout Quickly see the max-min spread from your recorded readings.

Average Useful when you want a stable reference value across multiple points.

Straightness (LSQ) Least-squares straightness estimate from your scan/sequence of readings.

FAQ

Does the app need the internet?

No. Core functionality works offline.

Does it collect data or track me?

No developer analytics or tracking SDKs. See Privacy.

Where are my readings stored?

Readings are kept on-device during use; any saved records (if you choose to save) stay local to your device.

Support / contact

Email wangning.engineer@outlook.com.

Download

Open the App Store page and install on iPhone.

Open App Store Support page Privacy policy